asiva@google.com
c363448f55
Review URL: https://codereview.chromium.org//1128333005 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@45743 260f80e4-7a28-3924-810f-c04153c831b5
4417 lines
161 KiB
C++
4417 lines
161 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/flow_graph_builder.h"
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#include "lib/invocation_mirror.h"
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#include "vm/ast_printer.h"
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#include "vm/bit_vector.h"
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#include "vm/class_finalizer.h"
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#include "vm/exceptions.h"
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#include "vm/flags.h"
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#include "vm/flow_graph.h"
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#include "vm/flow_graph_compiler.h"
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#include "vm/heap.h"
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#include "vm/il_printer.h"
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#include "vm/intermediate_language.h"
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#include "vm/isolate.h"
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#include "vm/object.h"
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#include "vm/object_store.h"
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#include "vm/os.h"
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#include "vm/parser.h"
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#include "vm/report.h"
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#include "vm/resolver.h"
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#include "vm/scopes.h"
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#include "vm/stack_frame.h"
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#include "vm/stub_code.h"
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#include "vm/symbols.h"
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#include "vm/token.h"
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#include "vm/zone.h"
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namespace dart {
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DEFINE_FLAG(bool, eliminate_type_checks, true,
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"Eliminate type checks when allowed by static type analysis.");
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DEFINE_FLAG(bool, print_ast, false, "Print abstract syntax tree.");
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DEFINE_FLAG(bool, print_scopes, false, "Print scopes of local variables.");
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DEFINE_FLAG(bool, support_debugger, true, "Emit code needed for debugging");
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DEFINE_FLAG(bool, trace_type_check_elimination, false,
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"Trace type check elimination at compile time.");
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DECLARE_FLAG(int, optimization_counter_threshold);
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DECLARE_FLAG(bool, warn_on_javascript_compatibility);
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DECLARE_FLAG(bool, use_field_guards);
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// Quick access to the locally defined zone() method.
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#define Z (zone())
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// TODO(srdjan): Allow compiler to add constants as they are encountered in
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// the compilation.
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const double kCommonDoubleConstants[] =
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{-1.0, -0.5, -0.1, 0.0, 0.1, 0.5, 1.0, 2.0, 4.0, 5.0,
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10.0, 20.0, 30.0, 64.0, 255.0, NAN,
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// From dart:math
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2.718281828459045, 2.302585092994046, 0.6931471805599453,
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1.4426950408889634, 0.4342944819032518, 3.1415926535897932,
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0.7071067811865476, 1.4142135623730951};
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uword FlowGraphBuilder::FindDoubleConstant(double value) {
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intptr_t len = sizeof(kCommonDoubleConstants) / sizeof(double); // NOLINT
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for (intptr_t i = 0; i < len; i++) {
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if (Utils::DoublesBitEqual(value, kCommonDoubleConstants[i])) {
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return reinterpret_cast<uword>(&kCommonDoubleConstants[i]);
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}
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}
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return 0;
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}
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#define RECOGNIZE_FACTORY(test_factory_symbol, cid, fp) \
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{ Symbols::k##test_factory_symbol##Id, cid, \
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fp, #test_factory_symbol ", " #cid },
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static struct {
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intptr_t symbold_id;
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intptr_t cid;
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intptr_t finger_print;
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const char* name;
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} factory_recognizer_list[] = {
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RECOGNIZED_LIST_FACTORY_LIST(RECOGNIZE_FACTORY)
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{ Symbols::kIllegal, -1, -1, NULL }
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};
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#undef RECOGNIZE_FACTORY
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intptr_t FactoryRecognizer::ResultCid(const Function& factory) {
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ASSERT(factory.IsFactory());
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const Class& function_class = Class::Handle(factory.Owner());
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const Library& lib = Library::Handle(function_class.library());
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ASSERT((lib.raw() == Library::CoreLibrary()) ||
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(lib.raw() == Library::TypedDataLibrary()));
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const String& factory_name = String::Handle(factory.name());
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for (intptr_t i = 0;
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factory_recognizer_list[i].symbold_id != Symbols::kIllegal;
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i++) {
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if (String::EqualsIgnoringPrivateKey(
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factory_name,
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Symbols::Symbol(factory_recognizer_list[i].symbold_id))) {
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return factory_recognizer_list[i].cid;
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}
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}
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return kDynamicCid;
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}
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// Base class for a stack of enclosing statements of interest (e.g.,
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// blocks (breakable) and loops (continuable)).
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class NestedStatement : public ValueObject {
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public:
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FlowGraphBuilder* owner() const { return owner_; }
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const SourceLabel* label() const { return label_; }
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NestedStatement* outer() const { return outer_; }
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JoinEntryInstr* break_target() const { return break_target_; }
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virtual intptr_t ContextLevel() const;
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virtual JoinEntryInstr* BreakTargetFor(SourceLabel* label);
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virtual JoinEntryInstr* ContinueTargetFor(SourceLabel* label);
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protected:
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NestedStatement(FlowGraphBuilder* owner, const SourceLabel* label)
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: owner_(owner),
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label_(label),
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outer_(owner->nesting_stack_),
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break_target_(NULL),
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try_index_(owner->try_index()) {
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// Push on the owner's nesting stack.
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owner->nesting_stack_ = this;
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}
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intptr_t try_index() const { return try_index_; }
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virtual ~NestedStatement() {
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// Pop from the owner's nesting stack.
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ASSERT(owner_->nesting_stack_ == this);
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owner_->nesting_stack_ = outer_;
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}
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private:
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FlowGraphBuilder* owner_;
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const SourceLabel* label_;
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NestedStatement* outer_;
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JoinEntryInstr* break_target_;
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const intptr_t try_index_;
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};
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intptr_t NestedStatement::ContextLevel() const {
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// Context level is determined by the innermost nested statement having one.
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return (outer() == NULL) ? 0 : outer()->ContextLevel();
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}
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intptr_t FlowGraphBuilder::context_level() const {
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return (nesting_stack() == NULL) ? 0 : nesting_stack()->ContextLevel();
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}
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JoinEntryInstr* NestedStatement::BreakTargetFor(SourceLabel* label) {
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if (label != label_) return NULL;
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if (break_target_ == NULL) {
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break_target_ =
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new(owner()->zone()) JoinEntryInstr(owner()->AllocateBlockId(),
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owner()->try_index());
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}
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return break_target_;
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}
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JoinEntryInstr* NestedStatement::ContinueTargetFor(SourceLabel* label) {
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return NULL;
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}
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// A nested statement that has its own context level.
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class NestedBlock : public NestedStatement {
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public:
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NestedBlock(FlowGraphBuilder* owner, SequenceNode* node)
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: NestedStatement(owner, node->label()), scope_(node->scope()) {}
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virtual intptr_t ContextLevel() const;
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private:
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LocalScope* scope_;
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};
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intptr_t NestedBlock::ContextLevel() const {
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return ((scope_ == NULL) || (scope_->num_context_variables() == 0))
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? NestedStatement::ContextLevel()
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: scope_->context_level();
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}
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// A nested statement that can be the target of a continue as well as a
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// break.
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class NestedLoop : public NestedStatement {
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public:
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NestedLoop(FlowGraphBuilder* owner, SourceLabel* label)
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: NestedStatement(owner, label), continue_target_(NULL) {
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owner->IncrementLoopDepth();
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}
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virtual ~NestedLoop() {
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owner()->DecrementLoopDepth();
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}
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JoinEntryInstr* continue_target() const { return continue_target_; }
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virtual JoinEntryInstr* ContinueTargetFor(SourceLabel* label);
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private:
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JoinEntryInstr* continue_target_;
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};
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JoinEntryInstr* NestedLoop::ContinueTargetFor(SourceLabel* label) {
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if (label != this->label()) return NULL;
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if (continue_target_ == NULL) {
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continue_target_ =
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new(owner()->zone()) JoinEntryInstr(owner()->AllocateBlockId(),
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try_index());
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}
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return continue_target_;
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}
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// A nested switch which can be the target of a break if labeled, and whose
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// cases can be the targets of continues.
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class NestedSwitch : public NestedStatement {
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public:
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NestedSwitch(FlowGraphBuilder* owner, SwitchNode* node);
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virtual JoinEntryInstr* ContinueTargetFor(SourceLabel* label);
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private:
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GrowableArray<SourceLabel*> case_labels_;
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GrowableArray<JoinEntryInstr*> case_targets_;
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};
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NestedSwitch::NestedSwitch(FlowGraphBuilder* owner, SwitchNode* node)
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: NestedStatement(owner, node->label()),
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case_labels_(node->body()->length()),
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case_targets_(node->body()->length()) {
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SequenceNode* body = node->body();
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for (intptr_t i = 0; i < body->length(); ++i) {
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CaseNode* case_node = body->NodeAt(i)->AsCaseNode();
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if (case_node != NULL) {
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case_labels_.Add(case_node->label());
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case_targets_.Add(NULL);
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}
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}
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}
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JoinEntryInstr* NestedSwitch::ContinueTargetFor(SourceLabel* label) {
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// Allocate a join for a case clause that matches the label. This block
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// is not necessarily targeted by a continue, but we always use a join in
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// the graph anyway.
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for (intptr_t i = 0; i < case_labels_.length(); ++i) {
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if (label != case_labels_[i]) continue;
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if (case_targets_[i] == NULL) {
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case_targets_[i] =
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new(owner()->zone()) JoinEntryInstr(owner()->AllocateBlockId(),
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try_index());
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}
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return case_targets_[i];
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}
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return NULL;
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}
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FlowGraphBuilder::FlowGraphBuilder(
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const ParsedFunction& parsed_function,
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const ZoneGrowableArray<const ICData*>& ic_data_array,
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InlineExitCollector* exit_collector,
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intptr_t osr_id) :
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parsed_function_(parsed_function),
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ic_data_array_(ic_data_array),
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num_copied_params_(parsed_function.num_copied_params()),
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// All parameters are copied if any parameter is.
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num_non_copied_params_((num_copied_params_ == 0)
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? parsed_function.function().num_fixed_parameters()
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: 0),
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num_stack_locals_(parsed_function.num_stack_locals()),
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exit_collector_(exit_collector),
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last_used_block_id_(0), // 0 is used for the graph entry.
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try_index_(CatchClauseNode::kInvalidTryIndex),
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catch_try_index_(CatchClauseNode::kInvalidTryIndex),
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loop_depth_(0),
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graph_entry_(NULL),
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temp_count_(0),
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args_pushed_(0),
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nesting_stack_(NULL),
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osr_id_(osr_id),
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jump_count_(0),
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await_joins_(new(Z) ZoneGrowableArray<JoinEntryInstr*>()),
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await_levels_(new(Z) ZoneGrowableArray<intptr_t>()) { }
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void FlowGraphBuilder::AddCatchEntry(CatchBlockEntryInstr* entry) {
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graph_entry_->AddCatchEntry(entry);
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}
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void InlineExitCollector::PrepareGraphs(FlowGraph* callee_graph) {
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ASSERT(callee_graph->graph_entry()->SuccessorCount() == 1);
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ASSERT(callee_graph->max_block_id() > caller_graph_->max_block_id());
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ASSERT(callee_graph->max_virtual_register_number() >
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caller_graph_->max_virtual_register_number());
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// Adjust the caller's maximum block id and current SSA temp index.
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caller_graph_->set_max_block_id(callee_graph->max_block_id());
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caller_graph_->set_current_ssa_temp_index(
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callee_graph->max_virtual_register_number());
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// Attach the outer environment on each instruction in the callee graph.
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ASSERT(call_->env() != NULL);
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// Scale the edge weights by the call count for the inlined function.
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double scale_factor = static_cast<double>(call_->CallCount())
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/ static_cast<double>(caller_graph_->graph_entry()->entry_count());
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for (BlockIterator block_it = callee_graph->postorder_iterator();
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!block_it.Done();
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block_it.Advance()) {
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BlockEntryInstr* block = block_it.Current();
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if (block->IsTargetEntry()) {
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block->AsTargetEntry()->adjust_edge_weight(scale_factor);
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}
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Instruction* instr = block;
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if (block->env() != NULL) {
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call_->env()->DeepCopyToOuter(callee_graph->zone(), block);
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}
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for (ForwardInstructionIterator it(block); !it.Done(); it.Advance()) {
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instr = it.Current();
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// TODO(zerny): Avoid creating unnecessary environments. Note that some
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// optimizations need deoptimization info for non-deoptable instructions,
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// eg, LICM on GOTOs.
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if (instr->env() != NULL) {
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call_->env()->DeepCopyToOuter(callee_graph->zone(), instr);
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}
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}
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if (instr->IsGoto()) {
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instr->AsGoto()->adjust_edge_weight(scale_factor);
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}
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}
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}
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void InlineExitCollector::AddExit(ReturnInstr* exit) {
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Data data = { NULL, exit };
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exits_.Add(data);
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}
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void InlineExitCollector::Union(const InlineExitCollector* other) {
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// It doesn't make sense to combine different calls or calls from
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// different graphs.
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ASSERT(caller_graph_ == other->caller_graph_);
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ASSERT(call_ == other->call_);
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exits_.AddArray(other->exits_);
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}
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int InlineExitCollector::LowestBlockIdFirst(const Data* a, const Data* b) {
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return (a->exit_block->block_id() - b->exit_block->block_id());
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}
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void InlineExitCollector::SortExits() {
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// Assign block entries here because we did not necessarily know them when
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// the return exit was added to the array.
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for (int i = 0; i < exits_.length(); ++i) {
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exits_[i].exit_block = exits_[i].exit_return->GetBlock();
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}
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exits_.Sort(LowestBlockIdFirst);
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}
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Definition* InlineExitCollector::JoinReturns(BlockEntryInstr** exit_block,
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Instruction** last_instruction,
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intptr_t try_index) {
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// First sort the list of exits by block id (caching return instruction
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// block entries as a side effect).
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SortExits();
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intptr_t num_exits = exits_.length();
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if (num_exits == 1) {
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ReturnAt(0)->UnuseAllInputs();
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*exit_block = ExitBlockAt(0);
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*last_instruction = LastInstructionAt(0);
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return call_->HasUses() ? ValueAt(0)->definition() : NULL;
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} else {
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ASSERT(num_exits > 1);
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// Create a join of the returns.
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intptr_t join_id = caller_graph_->max_block_id() + 1;
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caller_graph_->set_max_block_id(join_id);
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JoinEntryInstr* join =
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new(Z) JoinEntryInstr(join_id, try_index);
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// The dominator set of the join is the intersection of the dominator
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// sets of all the predecessors. If we keep the dominator sets ordered
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// by height in the dominator tree, we can also get the immediate
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// dominator of the join node from the intersection.
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//
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// block_dominators is the dominator set for each block, ordered from
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// the immediate dominator to the root of the dominator tree. This is
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// the order we collect them in (adding at the end).
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//
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// join_dominators is the join's dominators ordered from the root of the
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// dominator tree to the immediate dominator. This order supports
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// removing during intersection by truncating the list.
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GrowableArray<BlockEntryInstr*> block_dominators;
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GrowableArray<BlockEntryInstr*> join_dominators;
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for (intptr_t i = 0; i < num_exits; ++i) {
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// Add the control-flow edge.
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GotoInstr* goto_instr = new(Z) GotoInstr(join);
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goto_instr->InheritDeoptTarget(zone(), ReturnAt(i));
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LastInstructionAt(i)->LinkTo(goto_instr);
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ExitBlockAt(i)->set_last_instruction(LastInstructionAt(i)->next());
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join->predecessors_.Add(ExitBlockAt(i));
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// Collect the block's dominators.
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block_dominators.Clear();
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BlockEntryInstr* dominator = ExitBlockAt(i)->dominator();
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while (dominator != NULL) {
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block_dominators.Add(dominator);
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dominator = dominator->dominator();
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}
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if (i == 0) {
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// The initial dominator set is the first predecessor's dominator
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// set. Reverse it.
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for (intptr_t j = block_dominators.length() - 1; j >= 0; --j) {
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join_dominators.Add(block_dominators[j]);
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}
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} else {
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// Intersect the block's dominators with the join's dominators so far.
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intptr_t last = block_dominators.length() - 1;
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for (intptr_t j = 0; j < join_dominators.length(); ++j) {
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intptr_t k = last - j; // Corresponding index in block_dominators.
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if ((k < 0) || (join_dominators[j] != block_dominators[k])) {
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// We either exhausted the dominators for this block before
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// exhausting the current intersection, or else we found a block
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// on the path from the root of the tree that is not in common.
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// I.e., there cannot be an empty set of dominators.
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ASSERT(j > 0);
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join_dominators.TruncateTo(j);
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break;
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}
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}
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}
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}
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// The immediate dominator of the join is the last one in the ordered
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// intersection.
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join_dominators.Last()->AddDominatedBlock(join);
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*exit_block = join;
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*last_instruction = join;
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// If the call has uses, create a phi of the returns.
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if (call_->HasUses()) {
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// Add a phi of the return values.
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PhiInstr* phi = new(Z) PhiInstr(join, num_exits);
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phi->set_ssa_temp_index(caller_graph_->alloc_ssa_temp_index());
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phi->mark_alive();
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for (intptr_t i = 0; i < num_exits; ++i) {
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ReturnAt(i)->RemoveEnvironment();
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phi->SetInputAt(i, ValueAt(i));
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}
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join->InsertPhi(phi);
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join->InheritDeoptTargetAfter(caller_graph_, call_, phi);
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return phi;
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} else {
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// In the case that the result is unused, remove the return value uses
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// from their definition's use list.
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for (intptr_t i = 0; i < num_exits; ++i) {
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ReturnAt(i)->UnuseAllInputs();
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}
|
|
join->InheritDeoptTargetAfter(caller_graph_, call_, NULL);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void InlineExitCollector::ReplaceCall(TargetEntryInstr* callee_entry) {
|
|
ASSERT(call_->previous() != NULL);
|
|
ASSERT(call_->next() != NULL);
|
|
BlockEntryInstr* call_block = call_->GetBlock();
|
|
|
|
// Insert the callee graph into the caller graph.
|
|
BlockEntryInstr* callee_exit = NULL;
|
|
Instruction* callee_last_instruction = NULL;
|
|
|
|
if (exits_.length() == 0) {
|
|
// Handle the case when there are no normal return exits from the callee
|
|
// (i.e. the callee unconditionally throws) by inserting an artificial
|
|
// branch (true === true).
|
|
// The true successor is the inlined body, the false successor
|
|
// goes to the rest of the caller graph. It is removed as unreachable code
|
|
// by the constant propagation.
|
|
TargetEntryInstr* false_block =
|
|
new(Z) TargetEntryInstr(caller_graph_->allocate_block_id(),
|
|
call_block->try_index());
|
|
false_block->InheritDeoptTargetAfter(caller_graph_, call_, NULL);
|
|
false_block->LinkTo(call_->next());
|
|
call_block->ReplaceAsPredecessorWith(false_block);
|
|
|
|
ConstantInstr* true_const = caller_graph_->GetConstant(Bool::True());
|
|
BranchInstr* branch =
|
|
new(Z) BranchInstr(
|
|
new(Z) StrictCompareInstr(call_block->start_pos(),
|
|
Token::kEQ_STRICT,
|
|
new(Z) Value(true_const),
|
|
new(Z) Value(true_const),
|
|
false)); // No number check.
|
|
branch->InheritDeoptTarget(zone(), call_);
|
|
*branch->true_successor_address() = callee_entry;
|
|
*branch->false_successor_address() = false_block;
|
|
|
|
call_->previous()->AppendInstruction(branch);
|
|
call_block->set_last_instruction(branch);
|
|
|
|
// Update dominator tree.
|
|
call_block->AddDominatedBlock(callee_entry);
|
|
call_block->AddDominatedBlock(false_block);
|
|
|
|
} else {
|
|
Definition* callee_result = JoinReturns(&callee_exit,
|
|
&callee_last_instruction,
|
|
call_block->try_index());
|
|
if (callee_result != NULL) {
|
|
call_->ReplaceUsesWith(callee_result);
|
|
}
|
|
if (callee_last_instruction == callee_entry) {
|
|
// There are no instructions in the inlined function (e.g., it might be
|
|
// a return of a parameter or a return of a constant defined in the
|
|
// initial definitions).
|
|
call_->previous()->LinkTo(call_->next());
|
|
} else {
|
|
call_->previous()->LinkTo(callee_entry->next());
|
|
callee_last_instruction->LinkTo(call_->next());
|
|
}
|
|
if (callee_exit != callee_entry) {
|
|
// In case of control flow, locally update the predecessors, phis and
|
|
// dominator tree.
|
|
//
|
|
// Pictorially, the graph structure is:
|
|
//
|
|
// Bc : call_block Bi : callee_entry
|
|
// before_call inlined_head
|
|
// call ... other blocks ...
|
|
// after_call Be : callee_exit
|
|
// inlined_foot
|
|
// And becomes:
|
|
//
|
|
// Bc : call_block
|
|
// before_call
|
|
// inlined_head
|
|
// ... other blocks ...
|
|
// Be : callee_exit
|
|
// inlined_foot
|
|
// after_call
|
|
//
|
|
// For successors of 'after_call', the call block (Bc) is replaced as a
|
|
// predecessor by the callee exit (Be).
|
|
call_block->ReplaceAsPredecessorWith(callee_exit);
|
|
// For successors of 'inlined_head', the callee entry (Bi) is replaced
|
|
// as a predecessor by the call block (Bc).
|
|
callee_entry->ReplaceAsPredecessorWith(call_block);
|
|
|
|
// The callee exit is now the immediate dominator of blocks whose
|
|
// immediate dominator was the call block.
|
|
ASSERT(callee_exit->dominated_blocks().is_empty());
|
|
for (intptr_t i = 0; i < call_block->dominated_blocks().length(); ++i) {
|
|
BlockEntryInstr* block = call_block->dominated_blocks()[i];
|
|
callee_exit->AddDominatedBlock(block);
|
|
}
|
|
// The call block is now the immediate dominator of blocks whose
|
|
// immediate dominator was the callee entry.
|
|
call_block->ClearDominatedBlocks();
|
|
for (intptr_t i = 0; i < callee_entry->dominated_blocks().length(); ++i) {
|
|
BlockEntryInstr* block = callee_entry->dominated_blocks()[i];
|
|
call_block->AddDominatedBlock(block);
|
|
}
|
|
}
|
|
|
|
// Callee entry in not in the graph anymore. Remove it from use lists.
|
|
callee_entry->UnuseAllInputs();
|
|
}
|
|
// Neither call nor the graph entry (if present) are in the
|
|
// graph at this point. Remove them from use lists.
|
|
if (callee_entry->PredecessorCount() > 0) {
|
|
callee_entry->PredecessorAt(0)->AsGraphEntry()->UnuseAllInputs();
|
|
}
|
|
call_->UnuseAllInputs();
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::Append(const EffectGraphVisitor& other_fragment) {
|
|
ASSERT(is_open());
|
|
if (other_fragment.is_empty()) return;
|
|
if (is_empty()) {
|
|
entry_ = other_fragment.entry();
|
|
} else {
|
|
exit()->LinkTo(other_fragment.entry());
|
|
}
|
|
exit_ = other_fragment.exit();
|
|
}
|
|
|
|
|
|
Value* EffectGraphVisitor::Bind(Definition* definition) {
|
|
ASSERT(is_open());
|
|
owner()->DeallocateTemps(definition->InputCount());
|
|
owner()->add_args_pushed(-definition->ArgumentCount());
|
|
definition->set_temp_index(owner()->AllocateTemp());
|
|
if (is_empty()) {
|
|
entry_ = definition;
|
|
} else {
|
|
exit()->LinkTo(definition);
|
|
}
|
|
exit_ = definition;
|
|
return new(Z) Value(definition);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::Do(Definition* definition) {
|
|
ASSERT(is_open());
|
|
owner()->DeallocateTemps(definition->InputCount());
|
|
owner()->add_args_pushed(-definition->ArgumentCount());
|
|
if (is_empty()) {
|
|
entry_ = definition;
|
|
} else {
|
|
exit()->LinkTo(definition);
|
|
}
|
|
exit_ = definition;
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::AddInstruction(Instruction* instruction) {
|
|
ASSERT(is_open());
|
|
ASSERT(instruction->IsPushArgument() || !instruction->IsDefinition());
|
|
ASSERT(!instruction->IsBlockEntry());
|
|
owner()->DeallocateTemps(instruction->InputCount());
|
|
owner()->add_args_pushed(-instruction->ArgumentCount());
|
|
if (is_empty()) {
|
|
entry_ = exit_ = instruction;
|
|
} else {
|
|
exit()->LinkTo(instruction);
|
|
exit_ = instruction;
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::AddReturnExit(intptr_t token_pos, Value* value) {
|
|
ASSERT(is_open());
|
|
ReturnInstr* return_instr = new(Z) ReturnInstr(token_pos, value);
|
|
AddInstruction(return_instr);
|
|
InlineExitCollector* exit_collector = owner()->exit_collector();
|
|
if (exit_collector != NULL) {
|
|
exit_collector->AddExit(return_instr);
|
|
}
|
|
CloseFragment();
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::Goto(JoinEntryInstr* join) {
|
|
ASSERT(is_open());
|
|
if (is_empty()) {
|
|
entry_ = new(Z) GotoInstr(join);
|
|
} else {
|
|
exit()->Goto(join);
|
|
}
|
|
CloseFragment();
|
|
}
|
|
|
|
|
|
// Appends a graph fragment to a block entry instruction. Returns the entry
|
|
// instruction if the fragment was empty or else the exit of the fragment if
|
|
// it was non-empty (so NULL if the fragment is closed).
|
|
//
|
|
// Note that the fragment is no longer a valid fragment after calling this
|
|
// function -- the fragment is closed at its entry because the entry has a
|
|
// predecessor in the graph.
|
|
static Instruction* AppendFragment(BlockEntryInstr* entry,
|
|
const EffectGraphVisitor& fragment) {
|
|
if (fragment.is_empty()) return entry;
|
|
entry->LinkTo(fragment.entry());
|
|
return fragment.exit();
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::Join(const TestGraphVisitor& test_fragment,
|
|
const EffectGraphVisitor& true_fragment,
|
|
const EffectGraphVisitor& false_fragment) {
|
|
// We have: a test graph fragment with zero, one, or two available exits;
|
|
// and a pair of effect graph fragments with zero or one available exits.
|
|
// We want to append the branch and (if necessary) a join node to this
|
|
// graph fragment.
|
|
ASSERT(is_open());
|
|
|
|
// 1. Connect the test to this graph.
|
|
Append(test_fragment);
|
|
|
|
// 2. Connect the true and false bodies to the test and record their exits
|
|
// (if any).
|
|
BlockEntryInstr* true_entry = test_fragment.CreateTrueSuccessor();
|
|
Instruction* true_exit = AppendFragment(true_entry, true_fragment);
|
|
|
|
BlockEntryInstr* false_entry = test_fragment.CreateFalseSuccessor();
|
|
Instruction* false_exit = AppendFragment(false_entry, false_fragment);
|
|
|
|
// 3. Add a join or select one (or neither) of the arms as exit.
|
|
if (true_exit == NULL) {
|
|
exit_ = false_exit; // May be NULL.
|
|
} else if (false_exit == NULL) {
|
|
exit_ = true_exit;
|
|
} else {
|
|
JoinEntryInstr* join =
|
|
new(Z) JoinEntryInstr(owner()->AllocateBlockId(), owner()->try_index());
|
|
true_exit->Goto(join);
|
|
false_exit->Goto(join);
|
|
exit_ = join;
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::TieLoop(
|
|
intptr_t token_pos,
|
|
const TestGraphVisitor& test_fragment,
|
|
const EffectGraphVisitor& body_fragment,
|
|
const EffectGraphVisitor& test_preamble_fragment) {
|
|
// We have: a test graph fragment with zero, one, or two available exits;
|
|
// and an effect graph fragment with zero or one available exits. We want
|
|
// to append the 'while loop' consisting of the test graph fragment as
|
|
// condition and the effect graph fragment as body.
|
|
ASSERT(is_open());
|
|
|
|
// 1. Connect the body to the test if it is reachable, and if so record
|
|
// its exit (if any).
|
|
BlockEntryInstr* body_entry = test_fragment.CreateTrueSuccessor();
|
|
Instruction* body_exit = AppendFragment(body_entry, body_fragment);
|
|
|
|
// 2. Connect the test to this graph, including the body if reachable and
|
|
// using a fresh join node if the body is reachable and has an open exit.
|
|
if (body_exit == NULL) {
|
|
Append(test_preamble_fragment);
|
|
Append(test_fragment);
|
|
} else {
|
|
JoinEntryInstr* join =
|
|
new(Z) JoinEntryInstr(owner()->AllocateBlockId(), owner()->try_index());
|
|
CheckStackOverflowInstr* check =
|
|
new(Z) CheckStackOverflowInstr(token_pos, owner()->loop_depth());
|
|
join->LinkTo(check);
|
|
if (!test_preamble_fragment.is_empty()) {
|
|
check->LinkTo(test_preamble_fragment.entry());
|
|
test_preamble_fragment.exit()->LinkTo(test_fragment.entry());
|
|
} else {
|
|
check->LinkTo(test_fragment.entry());
|
|
}
|
|
Goto(join);
|
|
body_exit->Goto(join);
|
|
}
|
|
|
|
// 3. Set the exit to the graph to be the false successor of the test, a
|
|
// fresh target node
|
|
exit_ = test_fragment.CreateFalseSuccessor();
|
|
}
|
|
|
|
|
|
PushArgumentInstr* EffectGraphVisitor::PushArgument(Value* value) {
|
|
owner_->add_args_pushed(1);
|
|
PushArgumentInstr* result = new(Z) PushArgumentInstr(value);
|
|
AddInstruction(result);
|
|
return result;
|
|
}
|
|
|
|
|
|
Definition* EffectGraphVisitor::BuildStoreTemp(const LocalVariable& local,
|
|
Value* value) {
|
|
ASSERT(!local.is_captured());
|
|
return new(Z) StoreLocalInstr(local, value);
|
|
}
|
|
|
|
|
|
Definition* EffectGraphVisitor::BuildStoreExprTemp(Value* value) {
|
|
return BuildStoreTemp(*owner()->parsed_function().expression_temp_var(),
|
|
value);
|
|
}
|
|
|
|
|
|
Definition* EffectGraphVisitor::BuildLoadExprTemp() {
|
|
return BuildLoadLocal(*owner()->parsed_function().expression_temp_var());
|
|
}
|
|
|
|
|
|
Definition* EffectGraphVisitor::BuildStoreLocal(const LocalVariable& local,
|
|
Value* value) {
|
|
if (local.is_captured()) {
|
|
LocalVariable* tmp_var = EnterTempLocalScope(value);
|
|
intptr_t delta =
|
|
owner()->context_level() - local.owner()->context_level();
|
|
ASSERT(delta >= 0);
|
|
Value* context = Bind(BuildCurrentContext());
|
|
while (delta-- > 0) {
|
|
context = Bind(new(Z) LoadFieldInstr(
|
|
context, Context::parent_offset(), Type::ZoneHandle(Z, Type::null()),
|
|
Scanner::kNoSourcePos));
|
|
}
|
|
Value* tmp_val = Bind(new(Z) LoadLocalInstr(*tmp_var));
|
|
StoreInstanceFieldInstr* store =
|
|
new(Z) StoreInstanceFieldInstr(Context::variable_offset(local.index()),
|
|
context,
|
|
tmp_val,
|
|
kEmitStoreBarrier,
|
|
Scanner::kNoSourcePos);
|
|
Do(store);
|
|
return ExitTempLocalScope(tmp_var);
|
|
} else {
|
|
return new(Z) StoreLocalInstr(local, value);
|
|
}
|
|
}
|
|
|
|
|
|
Definition* EffectGraphVisitor::BuildLoadLocal(const LocalVariable& local) {
|
|
if (local.IsConst()) {
|
|
return new(Z) ConstantInstr(*local.ConstValue());
|
|
} else if (local.is_captured()) {
|
|
intptr_t delta =
|
|
owner()->context_level() - local.owner()->context_level();
|
|
ASSERT(delta >= 0);
|
|
Value* context = Bind(BuildCurrentContext());
|
|
while (delta-- > 0) {
|
|
context = Bind(new(Z) LoadFieldInstr(
|
|
context, Context::parent_offset(), Type::ZoneHandle(Z, Type::null()),
|
|
Scanner::kNoSourcePos));
|
|
}
|
|
return new(Z) LoadFieldInstr(context,
|
|
Context::variable_offset(local.index()),
|
|
local.type(),
|
|
Scanner::kNoSourcePos);
|
|
} else {
|
|
return new(Z) LoadLocalInstr(local);
|
|
}
|
|
}
|
|
|
|
|
|
// Stores current context into the 'variable'
|
|
void EffectGraphVisitor::BuildSaveContext(const LocalVariable& variable) {
|
|
Value* context = Bind(BuildCurrentContext());
|
|
Do(BuildStoreLocal(variable, context));
|
|
}
|
|
|
|
|
|
// Loads context saved in 'context_variable' into the current context.
|
|
void EffectGraphVisitor::BuildRestoreContext(const LocalVariable& variable) {
|
|
Value* load_saved_context = Bind(BuildLoadLocal(variable));
|
|
Do(BuildStoreContext(load_saved_context));
|
|
}
|
|
|
|
|
|
Definition* EffectGraphVisitor::BuildStoreContext(Value* value) {
|
|
return new(Z) StoreLocalInstr(
|
|
*owner()->parsed_function().current_context_var(), value);
|
|
}
|
|
|
|
|
|
Definition* EffectGraphVisitor::BuildCurrentContext() {
|
|
return new(Z) LoadLocalInstr(
|
|
*owner()->parsed_function().current_context_var());
|
|
}
|
|
|
|
|
|
void TestGraphVisitor::ConnectBranchesTo(
|
|
const GrowableArray<TargetEntryInstr**>& branches,
|
|
JoinEntryInstr* join) const {
|
|
ASSERT(!branches.is_empty());
|
|
for (intptr_t i = 0; i < branches.length(); i++) {
|
|
TargetEntryInstr* target =
|
|
new(Z) TargetEntryInstr(owner()->AllocateBlockId(),
|
|
owner()->try_index());
|
|
*(branches[i]) = target;
|
|
target->Goto(join);
|
|
}
|
|
}
|
|
|
|
|
|
void TestGraphVisitor::IfTrueGoto(JoinEntryInstr* join) const {
|
|
ConnectBranchesTo(true_successor_addresses_, join);
|
|
}
|
|
|
|
|
|
void TestGraphVisitor::IfFalseGoto(JoinEntryInstr* join) const {
|
|
ConnectBranchesTo(false_successor_addresses_, join);
|
|
}
|
|
|
|
|
|
BlockEntryInstr* TestGraphVisitor::CreateSuccessorFor(
|
|
const GrowableArray<TargetEntryInstr**>& branches) const {
|
|
ASSERT(!branches.is_empty());
|
|
|
|
if (branches.length() == 1) {
|
|
TargetEntryInstr* target =
|
|
new(Z) TargetEntryInstr(owner()->AllocateBlockId(),
|
|
owner()->try_index());
|
|
*(branches[0]) = target;
|
|
return target;
|
|
}
|
|
|
|
JoinEntryInstr* join =
|
|
new(Z) JoinEntryInstr(owner()->AllocateBlockId(), owner()->try_index());
|
|
ConnectBranchesTo(branches, join);
|
|
return join;
|
|
}
|
|
|
|
|
|
BlockEntryInstr* TestGraphVisitor::CreateTrueSuccessor() const {
|
|
return CreateSuccessorFor(true_successor_addresses_);
|
|
}
|
|
|
|
|
|
BlockEntryInstr* TestGraphVisitor::CreateFalseSuccessor() const {
|
|
return CreateSuccessorFor(false_successor_addresses_);
|
|
}
|
|
|
|
|
|
void TestGraphVisitor::ReturnValue(Value* value) {
|
|
if (Isolate::Current()->TypeChecksEnabled() ||
|
|
Isolate::Current()->AssertsEnabled()) {
|
|
value = Bind(new(Z) AssertBooleanInstr(condition_token_pos(), value));
|
|
}
|
|
Value* constant_true = Bind(new(Z) ConstantInstr(Bool::True()));
|
|
StrictCompareInstr* comp =
|
|
new(Z) StrictCompareInstr(condition_token_pos(),
|
|
Token::kEQ_STRICT,
|
|
value,
|
|
constant_true,
|
|
false); // No number check.
|
|
BranchInstr* branch = new(Z) BranchInstr(comp);
|
|
AddInstruction(branch);
|
|
CloseFragment();
|
|
|
|
true_successor_addresses_.Add(branch->true_successor_address());
|
|
false_successor_addresses_.Add(branch->false_successor_address());
|
|
}
|
|
|
|
|
|
void TestGraphVisitor::MergeBranchWithComparison(ComparisonInstr* comp) {
|
|
BranchInstr* branch;
|
|
if (Token::IsStrictEqualityOperator(comp->kind())) {
|
|
ASSERT(comp->IsStrictCompare());
|
|
branch = new(Z) BranchInstr(comp);
|
|
} else if (Token::IsEqualityOperator(comp->kind()) &&
|
|
(comp->left()->BindsToConstantNull() ||
|
|
comp->right()->BindsToConstantNull())) {
|
|
branch = new(Z) BranchInstr(new(Z) StrictCompareInstr(
|
|
comp->token_pos(),
|
|
(comp->kind() == Token::kEQ) ? Token::kEQ_STRICT : Token::kNE_STRICT,
|
|
comp->left(),
|
|
comp->right(),
|
|
false)); // No number check.
|
|
} else {
|
|
branch = new(Z) BranchInstr(comp);
|
|
branch->set_is_checked(Isolate::Current()->TypeChecksEnabled());
|
|
}
|
|
AddInstruction(branch);
|
|
CloseFragment();
|
|
true_successor_addresses_.Add(branch->true_successor_address());
|
|
false_successor_addresses_.Add(branch->false_successor_address());
|
|
}
|
|
|
|
|
|
void TestGraphVisitor::MergeBranchWithNegate(BooleanNegateInstr* neg) {
|
|
ASSERT(!Isolate::Current()->TypeChecksEnabled());
|
|
Value* constant_true = Bind(new(Z) ConstantInstr(Bool::True()));
|
|
StrictCompareInstr* comp =
|
|
new(Z) StrictCompareInstr(condition_token_pos(),
|
|
Token::kNE_STRICT,
|
|
neg->value(),
|
|
constant_true,
|
|
false); // No number check.
|
|
BranchInstr* branch = new(Z) BranchInstr(comp);
|
|
AddInstruction(branch);
|
|
CloseFragment();
|
|
true_successor_addresses_.Add(branch->true_successor_address());
|
|
false_successor_addresses_.Add(branch->false_successor_address());
|
|
}
|
|
|
|
|
|
void TestGraphVisitor::ReturnDefinition(Definition* definition) {
|
|
ComparisonInstr* comp = definition->AsComparison();
|
|
if (comp != NULL) {
|
|
MergeBranchWithComparison(comp);
|
|
return;
|
|
}
|
|
if (!Isolate::Current()->TypeChecksEnabled()) {
|
|
BooleanNegateInstr* neg = definition->AsBooleanNegate();
|
|
if (neg != NULL) {
|
|
MergeBranchWithNegate(neg);
|
|
return;
|
|
}
|
|
}
|
|
ReturnValue(Bind(definition));
|
|
}
|
|
|
|
|
|
// Special handling for AND/OR.
|
|
void TestGraphVisitor::VisitBinaryOpNode(BinaryOpNode* node) {
|
|
// Operators "&&" and "||" cannot be overloaded therefore do not call
|
|
// operator.
|
|
if ((node->kind() == Token::kAND) || (node->kind() == Token::kOR)) {
|
|
TestGraphVisitor for_left(owner(), node->left()->token_pos());
|
|
node->left()->Visit(&for_left);
|
|
|
|
TestGraphVisitor for_right(owner(), node->right()->token_pos());
|
|
node->right()->Visit(&for_right);
|
|
|
|
Append(for_left);
|
|
|
|
if (node->kind() == Token::kAND) {
|
|
AppendFragment(for_left.CreateTrueSuccessor(), for_right);
|
|
true_successor_addresses_.AddArray(for_right.true_successor_addresses_);
|
|
false_successor_addresses_.AddArray(for_left.false_successor_addresses_);
|
|
false_successor_addresses_.AddArray(for_right.false_successor_addresses_);
|
|
} else {
|
|
ASSERT(node->kind() == Token::kOR);
|
|
AppendFragment(for_left.CreateFalseSuccessor(), for_right);
|
|
false_successor_addresses_.AddArray(for_right.false_successor_addresses_);
|
|
true_successor_addresses_.AddArray(for_left.true_successor_addresses_);
|
|
true_successor_addresses_.AddArray(for_right.true_successor_addresses_);
|
|
}
|
|
CloseFragment();
|
|
return;
|
|
}
|
|
ValueGraphVisitor::VisitBinaryOpNode(node);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::Bailout(const char* reason) const {
|
|
owner()->Bailout(reason);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::InlineBailout(const char* reason) const {
|
|
owner()->function().set_is_inlinable(false);
|
|
if (owner()->IsInlining()) owner()->Bailout(reason);
|
|
}
|
|
|
|
|
|
// <Statement> ::= Return { value: <Expression>
|
|
// inlined_finally_list: <InlinedFinally>* }
|
|
void EffectGraphVisitor::VisitReturnNode(ReturnNode* node) {
|
|
ValueGraphVisitor for_value(owner());
|
|
node->value()->Visit(&for_value);
|
|
Append(for_value);
|
|
Value* return_value = for_value.value();
|
|
|
|
if (node->inlined_finally_list_length() > 0) {
|
|
LocalVariable* temp = owner()->parsed_function().finally_return_temp_var();
|
|
ASSERT(temp != NULL);
|
|
Do(BuildStoreLocal(*temp, return_value));
|
|
for (intptr_t i = 0; i < node->inlined_finally_list_length(); i++) {
|
|
InlineBailout("EffectGraphVisitor::VisitReturnNode (exception)");
|
|
EffectGraphVisitor for_effect(owner());
|
|
node->InlinedFinallyNodeAt(i)->Visit(&for_effect);
|
|
Append(for_effect);
|
|
if (!is_open()) {
|
|
return;
|
|
}
|
|
}
|
|
return_value = Bind(BuildLoadLocal(*temp));
|
|
}
|
|
|
|
// Call to stub that checks whether the debugger is in single
|
|
// step mode. This call must happen before the contexts are
|
|
// unchained so that captured variables can be inspected.
|
|
// No debugger check is done in native functions or for return
|
|
// statements for which there is no associated source position.
|
|
const Function& function = owner()->function();
|
|
if (FLAG_support_debugger &&
|
|
(node->token_pos() != Scanner::kNoSourcePos) && !function.is_native()) {
|
|
AddInstruction(new(Z) DebugStepCheckInstr(node->token_pos(),
|
|
RawPcDescriptors::kRuntimeCall));
|
|
}
|
|
|
|
if (Isolate::Current()->TypeChecksEnabled()) {
|
|
const bool is_implicit_dynamic_getter =
|
|
(!function.is_static() &&
|
|
((function.kind() == RawFunction::kImplicitGetter) ||
|
|
(function.kind() == RawFunction::kImplicitStaticFinalGetter)));
|
|
// Implicit getters do not need a type check at return, unless they compute
|
|
// the initial value of a static field.
|
|
// The body of a constructor cannot modify the type of the
|
|
// constructed instance, which is passed in as an implicit parameter.
|
|
// However, factories may create an instance of the wrong type.
|
|
if (!is_implicit_dynamic_getter && !function.IsGenerativeConstructor()) {
|
|
const AbstractType& dst_type =
|
|
AbstractType::ZoneHandle(Z, function.result_type());
|
|
return_value = BuildAssignableValue(node->value()->token_pos(),
|
|
return_value,
|
|
dst_type,
|
|
Symbols::FunctionResult());
|
|
}
|
|
}
|
|
|
|
// Async functions contain two types of return statements:
|
|
// 1) Returns that should complete the completer once all finally blocks have
|
|
// been inlined (call: :async_completer.complete(return_value)). These
|
|
// returns end up returning null in the end.
|
|
// 2) "Continuation" returns that should not complete the completer but return
|
|
// the value.
|
|
//
|
|
// We distinguish those kinds of nodes via is_regular_return().
|
|
//
|
|
if (function.IsAsyncClosure() &&
|
|
(node->return_type() == ReturnNode::kRegular)) {
|
|
// Temporary store the computed return value.
|
|
Do(BuildStoreExprTemp(return_value));
|
|
|
|
LocalVariable* rcv_var =
|
|
node->scope()->LookupVariable(Symbols::AsyncCompleter(), false);
|
|
ASSERT(rcv_var != NULL && rcv_var->is_captured());
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(2);
|
|
Value* rcv_value = Bind(BuildLoadLocal(*rcv_var));
|
|
arguments->Add(PushArgument(rcv_value));
|
|
Value* returned_value = Bind(BuildLoadExprTemp());
|
|
arguments->Add(PushArgument(returned_value));
|
|
InstanceCallInstr* call = new(Z) InstanceCallInstr(
|
|
Scanner::kNoSourcePos,
|
|
Symbols::CompleterComplete(),
|
|
Token::kILLEGAL,
|
|
arguments,
|
|
Object::null_array(),
|
|
1,
|
|
owner()->ic_data_array());
|
|
Do(call);
|
|
|
|
// Rebind the return value for the actual return call to be null.
|
|
return_value = BuildNullValue();
|
|
}
|
|
|
|
intptr_t current_context_level = owner()->context_level();
|
|
ASSERT(current_context_level >= 0);
|
|
if (HasContextScope()) {
|
|
UnchainContexts(current_context_level);
|
|
}
|
|
|
|
AddReturnExit(node->token_pos(), return_value);
|
|
|
|
if ((function.IsAsyncClosure() ||
|
|
function.IsSyncGenClosure() ||
|
|
function.IsAsyncGenClosure()) &&
|
|
(node->return_type() == ReturnNode::kContinuationTarget)) {
|
|
JoinEntryInstr* const join = new(Z) JoinEntryInstr(
|
|
owner()->AllocateBlockId(), owner()->try_index());
|
|
owner()->await_joins()->Add(join);
|
|
exit_ = join;
|
|
}
|
|
}
|
|
|
|
|
|
// <Expression> ::= Literal { literal: Instance }
|
|
void EffectGraphVisitor::VisitLiteralNode(LiteralNode* node) {
|
|
ReturnDefinition(new(Z) ConstantInstr(node->literal()));
|
|
}
|
|
|
|
|
|
// Type nodes are used when a type is referenced as a literal. Type nodes
|
|
// can also be used for the right-hand side of instanceof comparisons,
|
|
// but they are handled specially in that context, not here.
|
|
void EffectGraphVisitor::VisitTypeNode(TypeNode* node) {
|
|
return;
|
|
}
|
|
|
|
|
|
void ValueGraphVisitor::VisitTypeNode(TypeNode* node) {
|
|
const AbstractType& type = node->type();
|
|
// Type may be malbounded, but not malformed.
|
|
ASSERT(type.IsFinalized() && !type.IsMalformed());
|
|
if (type.IsInstantiated()) {
|
|
ReturnDefinition(new(Z) ConstantInstr(type));
|
|
} else {
|
|
const Class& instantiator_class = Class::ZoneHandle(
|
|
Z, owner()->function().Owner());
|
|
Value* instantiator_value = BuildInstantiatorTypeArguments(
|
|
node->token_pos(), instantiator_class, NULL);
|
|
ReturnDefinition(new(Z) InstantiateTypeInstr(
|
|
node->token_pos(), type, instantiator_class, instantiator_value));
|
|
}
|
|
}
|
|
|
|
|
|
// Returns true if the type check can be skipped, for example, if the
|
|
// destination type is dynamic or if the compile type of the value is a subtype
|
|
// of the destination type.
|
|
bool EffectGraphVisitor::CanSkipTypeCheck(intptr_t token_pos,
|
|
Value* value,
|
|
const AbstractType& dst_type,
|
|
const String& dst_name) {
|
|
ASSERT(!dst_type.IsNull());
|
|
ASSERT(dst_type.IsFinalized());
|
|
|
|
// If the destination type is malformed or malbounded, a dynamic type error
|
|
// must be thrown at run time.
|
|
if (dst_type.IsMalformedOrMalbounded()) {
|
|
return false;
|
|
}
|
|
|
|
// Any type is more specific than the dynamic type and than the Object type.
|
|
if (dst_type.IsDynamicType() || dst_type.IsObjectType()) {
|
|
return true;
|
|
}
|
|
|
|
// Do not perform type check elimination if this optimization is turned off.
|
|
if (!FLAG_eliminate_type_checks) {
|
|
return false;
|
|
}
|
|
|
|
// If nothing is known about the value, as is the case for passed-in
|
|
// parameters, and since dst_type is not one of the tested cases above, then
|
|
// the type test cannot be eliminated.
|
|
if (value == NULL) {
|
|
return false;
|
|
}
|
|
|
|
const bool eliminated = value->Type()->IsAssignableTo(dst_type);
|
|
if (FLAG_trace_type_check_elimination) {
|
|
FlowGraphPrinter::PrintTypeCheck(owner()->parsed_function(),
|
|
token_pos,
|
|
value,
|
|
dst_type,
|
|
dst_name,
|
|
eliminated);
|
|
}
|
|
return eliminated;
|
|
}
|
|
|
|
|
|
// <Expression> :: Assignable { expr: <Expression>
|
|
// type: AbstractType
|
|
// dst_name: String }
|
|
void EffectGraphVisitor::VisitAssignableNode(AssignableNode* node) {
|
|
ValueGraphVisitor for_value(owner());
|
|
node->expr()->Visit(&for_value);
|
|
Append(for_value);
|
|
Definition* checked_value;
|
|
if (CanSkipTypeCheck(node->expr()->token_pos(),
|
|
for_value.value(),
|
|
node->type(),
|
|
node->dst_name())) {
|
|
// Drop the value and 0 additional temporaries.
|
|
checked_value = new(Z) DropTempsInstr(0, for_value.value());
|
|
} else {
|
|
checked_value = BuildAssertAssignable(node->expr()->token_pos(),
|
|
for_value.value(),
|
|
node->type(),
|
|
node->dst_name());
|
|
}
|
|
ReturnDefinition(checked_value);
|
|
}
|
|
|
|
|
|
void ValueGraphVisitor::VisitAssignableNode(AssignableNode* node) {
|
|
ValueGraphVisitor for_value(owner());
|
|
node->expr()->Visit(&for_value);
|
|
Append(for_value);
|
|
ReturnValue(BuildAssignableValue(node->expr()->token_pos(),
|
|
for_value.value(),
|
|
node->type(),
|
|
node->dst_name()));
|
|
}
|
|
|
|
|
|
// <Expression> :: BinaryOp { kind: Token::Kind
|
|
// left: <Expression>
|
|
// right: <Expression> }
|
|
void EffectGraphVisitor::VisitBinaryOpNode(BinaryOpNode* node) {
|
|
// Operators "&&" and "||" cannot be overloaded therefore do not call
|
|
// operator.
|
|
if ((node->kind() == Token::kAND) || (node->kind() == Token::kOR)) {
|
|
// See ValueGraphVisitor::VisitBinaryOpNode.
|
|
TestGraphVisitor for_left(owner(), node->left()->token_pos());
|
|
node->left()->Visit(&for_left);
|
|
EffectGraphVisitor empty(owner());
|
|
if (Isolate::Current()->TypeChecksEnabled() ||
|
|
Isolate::Current()->AssertsEnabled()) {
|
|
ValueGraphVisitor for_right(owner());
|
|
node->right()->Visit(&for_right);
|
|
Value* right_value = for_right.value();
|
|
for_right.Do(new(Z) AssertBooleanInstr(node->right()->token_pos(),
|
|
right_value));
|
|
if (node->kind() == Token::kAND) {
|
|
Join(for_left, for_right, empty);
|
|
} else {
|
|
Join(for_left, empty, for_right);
|
|
}
|
|
} else {
|
|
EffectGraphVisitor for_right(owner());
|
|
node->right()->Visit(&for_right);
|
|
if (node->kind() == Token::kAND) {
|
|
Join(for_left, for_right, empty);
|
|
} else {
|
|
Join(for_left, empty, for_right);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
ValueGraphVisitor for_left_value(owner());
|
|
node->left()->Visit(&for_left_value);
|
|
Append(for_left_value);
|
|
PushArgumentInstr* push_left = PushArgument(for_left_value.value());
|
|
|
|
ValueGraphVisitor for_right_value(owner());
|
|
node->right()->Visit(&for_right_value);
|
|
Append(for_right_value);
|
|
PushArgumentInstr* push_right = PushArgument(for_right_value.value());
|
|
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(2);
|
|
arguments->Add(push_left);
|
|
arguments->Add(push_right);
|
|
const String& name = String::ZoneHandle(Z, Symbols::New(node->TokenName()));
|
|
const intptr_t kNumArgsChecked = 2;
|
|
InstanceCallInstr* call = new(Z) InstanceCallInstr(node->token_pos(),
|
|
name,
|
|
node->kind(),
|
|
arguments,
|
|
Object::null_array(),
|
|
kNumArgsChecked,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(call);
|
|
}
|
|
|
|
|
|
// Special handling for AND/OR.
|
|
void ValueGraphVisitor::VisitBinaryOpNode(BinaryOpNode* node) {
|
|
// Operators "&&" and "||" cannot be overloaded therefore do not call
|
|
// operator.
|
|
if ((node->kind() == Token::kAND) || (node->kind() == Token::kOR)) {
|
|
// Implement short-circuit logic: do not evaluate right if evaluation
|
|
// of left is sufficient.
|
|
// AND: left ? right === true : false;
|
|
// OR: left ? true : right === true;
|
|
|
|
TestGraphVisitor for_test(owner(), node->left()->token_pos());
|
|
node->left()->Visit(&for_test);
|
|
|
|
ValueGraphVisitor for_right(owner());
|
|
node->right()->Visit(&for_right);
|
|
Value* right_value = for_right.value();
|
|
if (Isolate::Current()->TypeChecksEnabled() ||
|
|
Isolate::Current()->AssertsEnabled()) {
|
|
right_value =
|
|
for_right.Bind(new(Z) AssertBooleanInstr(node->right()->token_pos(),
|
|
right_value));
|
|
}
|
|
Value* constant_true = for_right.Bind(new(Z) ConstantInstr(Bool::True()));
|
|
Value* compare =
|
|
for_right.Bind(new(Z) StrictCompareInstr(node->token_pos(),
|
|
Token::kEQ_STRICT,
|
|
right_value,
|
|
constant_true,
|
|
false)); // No number check.
|
|
for_right.Do(BuildStoreExprTemp(compare));
|
|
|
|
if (node->kind() == Token::kAND) {
|
|
ValueGraphVisitor for_false(owner());
|
|
Value* constant_false =
|
|
for_false.Bind(new(Z) ConstantInstr(Bool::False()));
|
|
for_false.Do(BuildStoreExprTemp(constant_false));
|
|
Join(for_test, for_right, for_false);
|
|
} else {
|
|
ASSERT(node->kind() == Token::kOR);
|
|
ValueGraphVisitor for_true(owner());
|
|
Value* constant_true = for_true.Bind(new(Z) ConstantInstr(Bool::True()));
|
|
for_true.Do(BuildStoreExprTemp(constant_true));
|
|
Join(for_test, for_true, for_right);
|
|
}
|
|
ReturnDefinition(BuildLoadExprTemp());
|
|
return;
|
|
}
|
|
EffectGraphVisitor::VisitBinaryOpNode(node);
|
|
}
|
|
|
|
|
|
static const String& BinaryOpAndMaskName(BinaryOpNode* node) {
|
|
if (node->kind() == Token::kSHL) {
|
|
return Library::PrivateCoreLibName(Symbols::_leftShiftWithMask32());
|
|
}
|
|
UNIMPLEMENTED();
|
|
return String::ZoneHandle(Thread::Current()->zone(), String::null());
|
|
}
|
|
|
|
|
|
// <Expression> :: BinaryOp { kind: Token::Kind
|
|
// left: <Expression>
|
|
// right: <Expression>
|
|
// mask32: constant }
|
|
void EffectGraphVisitor::VisitBinaryOpWithMask32Node(
|
|
BinaryOpWithMask32Node* node) {
|
|
ASSERT((node->kind() != Token::kAND) && (node->kind() != Token::kOR));
|
|
ValueGraphVisitor for_left_value(owner());
|
|
node->left()->Visit(&for_left_value);
|
|
Append(for_left_value);
|
|
PushArgumentInstr* push_left = PushArgument(for_left_value.value());
|
|
|
|
ValueGraphVisitor for_right_value(owner());
|
|
node->right()->Visit(&for_right_value);
|
|
Append(for_right_value);
|
|
PushArgumentInstr* push_right = PushArgument(for_right_value.value());
|
|
|
|
Value* mask_value = Bind(new(Z) ConstantInstr(
|
|
Integer::ZoneHandle(Z, Integer::New(node->mask32(), Heap::kOld))));
|
|
PushArgumentInstr* push_mask = PushArgument(mask_value);
|
|
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(3);
|
|
arguments->Add(push_left);
|
|
arguments->Add(push_right);
|
|
// Call to special method 'BinaryOpAndMaskName(node)'.
|
|
arguments->Add(push_mask);
|
|
const intptr_t kNumArgsChecked = 2;
|
|
InstanceCallInstr* call = new(Z) InstanceCallInstr(node->token_pos(),
|
|
BinaryOpAndMaskName(node),
|
|
Token::kILLEGAL,
|
|
arguments,
|
|
Object::null_array(),
|
|
kNumArgsChecked,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(call);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildTypecheckPushArguments(
|
|
intptr_t token_pos,
|
|
PushArgumentInstr** push_instantiator_result,
|
|
PushArgumentInstr** push_instantiator_type_arguments_result) {
|
|
const Class& instantiator_class = Class::Handle(
|
|
Z, owner()->function().Owner());
|
|
// Since called only when type tested against is not instantiated.
|
|
ASSERT(instantiator_class.NumTypeParameters() > 0);
|
|
Value* instantiator_type_arguments = NULL;
|
|
Value* instantiator = BuildInstantiator(instantiator_class);
|
|
if (instantiator == NULL) {
|
|
// No instantiator when inside factory.
|
|
*push_instantiator_result = PushArgument(BuildNullValue());
|
|
instantiator_type_arguments =
|
|
BuildInstantiatorTypeArguments(token_pos, instantiator_class, NULL);
|
|
} else {
|
|
instantiator = Bind(BuildStoreExprTemp(instantiator));
|
|
*push_instantiator_result = PushArgument(instantiator);
|
|
Value* loaded = Bind(BuildLoadExprTemp());
|
|
instantiator_type_arguments =
|
|
BuildInstantiatorTypeArguments(token_pos, instantiator_class, loaded);
|
|
}
|
|
*push_instantiator_type_arguments_result =
|
|
PushArgument(instantiator_type_arguments);
|
|
}
|
|
|
|
|
|
|
|
void EffectGraphVisitor::BuildTypecheckArguments(
|
|
intptr_t token_pos,
|
|
Value** instantiator_result,
|
|
Value** instantiator_type_arguments_result) {
|
|
Value* instantiator = NULL;
|
|
Value* instantiator_type_arguments = NULL;
|
|
const Class& instantiator_class = Class::Handle(
|
|
Z, owner()->function().Owner());
|
|
// Since called only when type tested against is not instantiated.
|
|
ASSERT(instantiator_class.NumTypeParameters() > 0);
|
|
instantiator = BuildInstantiator(instantiator_class);
|
|
if (instantiator == NULL) {
|
|
// No instantiator when inside factory.
|
|
instantiator = BuildNullValue();
|
|
instantiator_type_arguments =
|
|
BuildInstantiatorTypeArguments(token_pos, instantiator_class, NULL);
|
|
} else {
|
|
// Preserve instantiator.
|
|
instantiator = Bind(BuildStoreExprTemp(instantiator));
|
|
Value* loaded = Bind(BuildLoadExprTemp());
|
|
instantiator_type_arguments =
|
|
BuildInstantiatorTypeArguments(token_pos, instantiator_class, loaded);
|
|
}
|
|
*instantiator_result = instantiator;
|
|
*instantiator_type_arguments_result = instantiator_type_arguments;
|
|
}
|
|
|
|
|
|
Value* EffectGraphVisitor::BuildNullValue() {
|
|
return Bind(new(Z) ConstantInstr(Object::ZoneHandle(Z, Object::null())));
|
|
}
|
|
|
|
|
|
// Used for testing incoming arguments.
|
|
AssertAssignableInstr* EffectGraphVisitor::BuildAssertAssignable(
|
|
intptr_t token_pos,
|
|
Value* value,
|
|
const AbstractType& dst_type,
|
|
const String& dst_name) {
|
|
// Build the type check computation.
|
|
Value* instantiator = NULL;
|
|
Value* instantiator_type_arguments = NULL;
|
|
if (dst_type.IsInstantiated()) {
|
|
instantiator = BuildNullValue();
|
|
instantiator_type_arguments = BuildNullValue();
|
|
} else {
|
|
BuildTypecheckArguments(token_pos,
|
|
&instantiator,
|
|
&instantiator_type_arguments);
|
|
}
|
|
|
|
const intptr_t deopt_id = Isolate::Current()->GetNextDeoptId();
|
|
return new(Z) AssertAssignableInstr(token_pos,
|
|
value,
|
|
instantiator,
|
|
instantiator_type_arguments,
|
|
dst_type,
|
|
dst_name,
|
|
deopt_id);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildSyncYieldJump(LocalVariable* old_context,
|
|
LocalVariable* iterator_param,
|
|
const intptr_t old_ctx_level,
|
|
JoinEntryInstr* target) {
|
|
// Building a jump consists of the following actions:
|
|
// * Load the generator body's iterator parameter (:iterator)
|
|
// from the current context into a temporary.
|
|
// * Restore the old context from :await_cxt_var.
|
|
// * Copy the iterator saved above into the restored context.
|
|
// * Append a Goto to the target's join.
|
|
ASSERT((iterator_param != NULL) && iterator_param->is_captured());
|
|
ASSERT((old_context != NULL) && old_context->is_captured());
|
|
// Before restoring the context we need to temporarily save the
|
|
// iterator parameter.
|
|
LocalVariable* temp_iterator_var =
|
|
EnterTempLocalScope(Bind(BuildLoadLocal(*iterator_param)));
|
|
|
|
// Restore the saved continuation context, i.e. the context that was
|
|
// saved into :await_ctx_var before the closure suspended.
|
|
BuildRestoreContext(*old_context);
|
|
|
|
// Store the continuation result and continuation error values into
|
|
// the restored context.
|
|
|
|
// FlowGraphBuilder is at top context level, but the continuation
|
|
// target has possibly been recorded in a nested context (old_ctx_level).
|
|
// We need to unroll manually here.
|
|
intptr_t delta =
|
|
old_ctx_level - iterator_param->owner()->context_level();
|
|
ASSERT(delta >= 0);
|
|
Value* context = Bind(BuildCurrentContext());
|
|
while (delta-- > 0) {
|
|
context = Bind(new(Z) LoadFieldInstr(
|
|
context, Context::parent_offset(), Type::ZoneHandle(Z, Type::null()),
|
|
Scanner::kNoSourcePos));
|
|
}
|
|
LocalVariable* temp_context_var = EnterTempLocalScope(context);
|
|
|
|
Value* context_val = Bind(new(Z) LoadLocalInstr(*temp_context_var));
|
|
Value* store_val = Bind(new(Z) LoadLocalInstr(*temp_iterator_var));
|
|
StoreInstanceFieldInstr* store = new(Z) StoreInstanceFieldInstr(
|
|
Context::variable_offset(iterator_param->index()),
|
|
context_val,
|
|
store_val,
|
|
kEmitStoreBarrier,
|
|
Scanner::kNoSourcePos);
|
|
Do(store);
|
|
|
|
Do(ExitTempLocalScope(temp_context_var));
|
|
Do(ExitTempLocalScope(temp_iterator_var));
|
|
|
|
// Goto saved join.
|
|
Goto(target);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildAsyncJump(LocalVariable* old_context,
|
|
LocalVariable* continuation_result,
|
|
LocalVariable* continuation_error,
|
|
LocalVariable* continuation_stack_trace,
|
|
const intptr_t old_ctx_level,
|
|
JoinEntryInstr* target) {
|
|
// Building a jump consists of the following actions:
|
|
// * Load the current continuation result parameter (:async_result)
|
|
// and continuation error parameter (:async_error_param) from
|
|
// the current context into temporaries.
|
|
// * Restore the old context from :await_cxt_var.
|
|
// * Copy the result and error parameters saved above into the restored
|
|
// context.
|
|
// * Append a Goto to the target's join.
|
|
ASSERT((continuation_result != NULL) && continuation_result->is_captured());
|
|
ASSERT((continuation_error != NULL) && continuation_error->is_captured());
|
|
ASSERT((old_context != NULL) && old_context->is_captured());
|
|
// Before restoring the continuation context we need to temporary save the
|
|
// result and error parameter.
|
|
LocalVariable* temp_result_var =
|
|
EnterTempLocalScope(Bind(BuildLoadLocal(*continuation_result)));
|
|
LocalVariable* temp_error_var =
|
|
EnterTempLocalScope(Bind(BuildLoadLocal(*continuation_error)));
|
|
LocalVariable* temp_stack_trace_var =
|
|
EnterTempLocalScope(Bind(BuildLoadLocal(*continuation_stack_trace)));
|
|
|
|
// Restore the saved continuation context, i.e. the context that was
|
|
// saved into :await_ctx_var before the closure suspended.
|
|
BuildRestoreContext(*old_context);
|
|
|
|
// Store the continuation result and continuation error values into
|
|
// the restored context.
|
|
|
|
// FlowGraphBuilder is at top context level, but the await target has possibly
|
|
// been recorded in a nested context (old_ctx_level). We need to unroll
|
|
// manually here.
|
|
intptr_t delta =
|
|
old_ctx_level - continuation_result->owner()->context_level();
|
|
ASSERT(delta >= 0);
|
|
Value* context = Bind(BuildCurrentContext());
|
|
while (delta-- > 0) {
|
|
context = Bind(new(Z) LoadFieldInstr(
|
|
context, Context::parent_offset(), Type::ZoneHandle(Z, Type::null()),
|
|
Scanner::kNoSourcePos));
|
|
}
|
|
LocalVariable* temp_context_var = EnterTempLocalScope(context);
|
|
|
|
Value* context_val = Bind(new(Z) LoadLocalInstr(*temp_context_var));
|
|
Value* store_val = Bind(new(Z) LoadLocalInstr(*temp_result_var));
|
|
StoreInstanceFieldInstr* store = new(Z) StoreInstanceFieldInstr(
|
|
Context::variable_offset(continuation_result->index()),
|
|
context_val,
|
|
store_val,
|
|
kEmitStoreBarrier,
|
|
Scanner::kNoSourcePos);
|
|
Do(store);
|
|
context_val = Bind(new(Z) LoadLocalInstr(*temp_context_var));
|
|
store_val = Bind(new(Z) LoadLocalInstr(*temp_error_var));
|
|
StoreInstanceFieldInstr* store2 = new(Z) StoreInstanceFieldInstr(
|
|
Context::variable_offset(continuation_error->index()),
|
|
context_val,
|
|
store_val,
|
|
kEmitStoreBarrier,
|
|
Scanner::kNoSourcePos);
|
|
Do(store2);
|
|
|
|
context_val = Bind(new(Z) LoadLocalInstr(*temp_context_var));
|
|
store_val = Bind(new(Z) LoadLocalInstr(*temp_stack_trace_var));
|
|
StoreInstanceFieldInstr* store3 = new(Z) StoreInstanceFieldInstr(
|
|
Context::variable_offset(continuation_stack_trace->index()),
|
|
context_val,
|
|
store_val,
|
|
kEmitStoreBarrier,
|
|
Scanner::kNoSourcePos);
|
|
Do(store3);
|
|
|
|
Do(ExitTempLocalScope(temp_context_var));
|
|
Do(ExitTempLocalScope(temp_stack_trace_var));
|
|
Do(ExitTempLocalScope(temp_error_var));
|
|
Do(ExitTempLocalScope(temp_result_var));
|
|
|
|
// Goto saved join.
|
|
Goto(target);
|
|
}
|
|
|
|
|
|
// Used for type casts and to test assignments.
|
|
Value* EffectGraphVisitor::BuildAssignableValue(intptr_t token_pos,
|
|
Value* value,
|
|
const AbstractType& dst_type,
|
|
const String& dst_name) {
|
|
if (CanSkipTypeCheck(token_pos, value, dst_type, dst_name)) {
|
|
return value;
|
|
}
|
|
return Bind(BuildAssertAssignable(token_pos, value, dst_type, dst_name));
|
|
}
|
|
|
|
|
|
bool FlowGraphBuilder::WarnOnJSIntegralNumTypeTest(
|
|
AstNode* node, const AbstractType& type) const {
|
|
if (!(node->IsLiteralNode() && (type.IsIntType() || type.IsDoubleType()))) {
|
|
return false;
|
|
}
|
|
const Instance& instance = node->AsLiteralNode()->literal();
|
|
if (type.IsIntType()) {
|
|
if (instance.IsDouble()) {
|
|
const Double& double_instance = Double::Cast(instance);
|
|
double value = double_instance.value();
|
|
if (floor(value) == value) {
|
|
return true;
|
|
}
|
|
}
|
|
} else {
|
|
ASSERT(type.IsDoubleType());
|
|
if (instance.IsInteger()) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildTypeTest(ComparisonNode* node) {
|
|
ASSERT(Token::IsTypeTestOperator(node->kind()));
|
|
const AbstractType& type = node->right()->AsTypeNode()->type();
|
|
ASSERT(type.IsFinalized() && !type.IsMalformedOrMalbounded());
|
|
const bool negate_result = (node->kind() == Token::kISNOT);
|
|
// All objects are instances of type T if Object type is a subtype of type T.
|
|
const Type& object_type = Type::Handle(Z, Type::ObjectType());
|
|
if (type.IsInstantiated() && object_type.IsSubtypeOf(type, NULL)) {
|
|
// Must evaluate left side.
|
|
EffectGraphVisitor for_left_value(owner());
|
|
node->left()->Visit(&for_left_value);
|
|
Append(for_left_value);
|
|
ReturnDefinition(new(Z) ConstantInstr(Bool::Get(!negate_result)));
|
|
return;
|
|
}
|
|
ValueGraphVisitor for_left_value(owner());
|
|
node->left()->Visit(&for_left_value);
|
|
Append(for_left_value);
|
|
PushArgumentInstr* push_left = PushArgument(for_left_value.value());
|
|
PushArgumentInstr* push_instantiator = NULL;
|
|
PushArgumentInstr* push_type_args = NULL;
|
|
if (type.IsInstantiated()) {
|
|
push_instantiator = PushArgument(BuildNullValue());
|
|
push_type_args = PushArgument(BuildNullValue());
|
|
} else {
|
|
BuildTypecheckPushArguments(node->token_pos(),
|
|
&push_instantiator,
|
|
&push_type_args);
|
|
}
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(5);
|
|
arguments->Add(push_left);
|
|
arguments->Add(push_instantiator);
|
|
arguments->Add(push_type_args);
|
|
ASSERT(!node->right()->AsTypeNode()->type().IsNull());
|
|
Value* type_arg = Bind(
|
|
new(Z) ConstantInstr(node->right()->AsTypeNode()->type()));
|
|
arguments->Add(PushArgument(type_arg));
|
|
const Bool& negate = Bool::Get(node->kind() == Token::kISNOT);
|
|
Value* negate_arg = Bind(new(Z) ConstantInstr(negate));
|
|
arguments->Add(PushArgument(negate_arg));
|
|
const intptr_t kNumArgsChecked = 1;
|
|
InstanceCallInstr* call = new(Z) InstanceCallInstr(
|
|
node->token_pos(),
|
|
Library::PrivateCoreLibName(Symbols::_instanceOf()),
|
|
node->kind(),
|
|
arguments,
|
|
Object::null_array(), // No argument names.
|
|
kNumArgsChecked,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(call);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildTypeCast(ComparisonNode* node) {
|
|
ASSERT(Token::IsTypeCastOperator(node->kind()));
|
|
ASSERT(!node->right()->AsTypeNode()->type().IsNull());
|
|
const AbstractType& type = node->right()->AsTypeNode()->type();
|
|
ASSERT(type.IsFinalized() && !type.IsMalformed() && !type.IsMalbounded());
|
|
ValueGraphVisitor for_value(owner());
|
|
node->left()->Visit(&for_value);
|
|
Append(for_value);
|
|
const String& dst_name = String::ZoneHandle(
|
|
Z, Symbols::New(Exceptions::kCastErrorDstName));
|
|
if (CanSkipTypeCheck(node->token_pos(),
|
|
for_value.value(),
|
|
type,
|
|
dst_name)) {
|
|
// Check for javascript compatibility.
|
|
// Do not skip type check if javascript compatibility warning is required.
|
|
if (!FLAG_warn_on_javascript_compatibility ||
|
|
!owner()->WarnOnJSIntegralNumTypeTest(node->left(), type)) {
|
|
ReturnValue(for_value.value());
|
|
return;
|
|
}
|
|
}
|
|
PushArgumentInstr* push_left = PushArgument(for_value.value());
|
|
PushArgumentInstr* push_instantiator = NULL;
|
|
PushArgumentInstr* push_type_args = NULL;
|
|
if (type.IsInstantiated()) {
|
|
push_instantiator = PushArgument(BuildNullValue());
|
|
push_type_args = PushArgument(BuildNullValue());
|
|
} else {
|
|
BuildTypecheckPushArguments(node->token_pos(),
|
|
&push_instantiator,
|
|
&push_type_args);
|
|
}
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(4);
|
|
arguments->Add(push_left);
|
|
arguments->Add(push_instantiator);
|
|
arguments->Add(push_type_args);
|
|
Value* type_arg = Bind(new(Z) ConstantInstr(type));
|
|
arguments->Add(PushArgument(type_arg));
|
|
const intptr_t kNumArgsChecked = 1;
|
|
InstanceCallInstr* call = new(Z) InstanceCallInstr(
|
|
node->token_pos(),
|
|
Library::PrivateCoreLibName(Symbols::_as()),
|
|
node->kind(),
|
|
arguments,
|
|
Object::null_array(), // No argument names.
|
|
kNumArgsChecked,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(call);
|
|
}
|
|
|
|
|
|
StrictCompareInstr* EffectGraphVisitor::BuildStrictCompare(AstNode* left,
|
|
AstNode* right,
|
|
Token::Kind kind,
|
|
intptr_t token_pos) {
|
|
ValueGraphVisitor for_left_value(owner());
|
|
left->Visit(&for_left_value);
|
|
Append(for_left_value);
|
|
ValueGraphVisitor for_right_value(owner());
|
|
right->Visit(&for_right_value);
|
|
Append(for_right_value);
|
|
StrictCompareInstr* comp = new(Z) StrictCompareInstr(token_pos,
|
|
kind,
|
|
for_left_value.value(),
|
|
for_right_value.value(),
|
|
true); // Number check.
|
|
return comp;
|
|
}
|
|
|
|
|
|
// <Expression> :: Comparison { kind: Token::Kind
|
|
// left: <Expression>
|
|
// right: <Expression> }
|
|
void EffectGraphVisitor::VisitComparisonNode(ComparisonNode* node) {
|
|
if (Token::IsTypeTestOperator(node->kind())) {
|
|
BuildTypeTest(node);
|
|
return;
|
|
}
|
|
if (Token::IsTypeCastOperator(node->kind())) {
|
|
BuildTypeCast(node);
|
|
return;
|
|
}
|
|
|
|
if ((node->kind() == Token::kEQ_STRICT) ||
|
|
(node->kind() == Token::kNE_STRICT)) {
|
|
ReturnDefinition(BuildStrictCompare(node->left(), node->right(),
|
|
node->kind(), node->token_pos()));
|
|
return;
|
|
}
|
|
|
|
if ((node->kind() == Token::kEQ) || (node->kind() == Token::kNE)) {
|
|
// Eagerly fold null-comparisons.
|
|
LiteralNode* left_lit = node->left()->AsLiteralNode();
|
|
LiteralNode* right_lit = node->right()->AsLiteralNode();
|
|
if (((left_lit != NULL) && left_lit->literal().IsNull()) ||
|
|
((right_lit != NULL) && right_lit->literal().IsNull())) {
|
|
Token::Kind kind =
|
|
(node->kind() == Token::kEQ) ? Token::kEQ_STRICT : Token::kNE_STRICT;
|
|
StrictCompareInstr* compare =
|
|
BuildStrictCompare(node->left(), node->right(),
|
|
kind, node->token_pos());
|
|
ReturnDefinition(compare);
|
|
return;
|
|
}
|
|
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(2);
|
|
|
|
ValueGraphVisitor for_left_value(owner());
|
|
node->left()->Visit(&for_left_value);
|
|
Append(for_left_value);
|
|
PushArgumentInstr* push_left = PushArgument(for_left_value.value());
|
|
arguments->Add(push_left);
|
|
|
|
ValueGraphVisitor for_right_value(owner());
|
|
node->right()->Visit(&for_right_value);
|
|
Append(for_right_value);
|
|
PushArgumentInstr* push_right = PushArgument(for_right_value.value());
|
|
arguments->Add(push_right);
|
|
|
|
Definition* result = new(Z) InstanceCallInstr(
|
|
node->token_pos(),
|
|
Symbols::EqualOperator(),
|
|
Token::kEQ, // Result is negated later for kNE.
|
|
arguments,
|
|
Object::null_array(),
|
|
2,
|
|
owner()->ic_data_array());
|
|
if (node->kind() == Token::kNE) {
|
|
if (Isolate::Current()->TypeChecksEnabled() ||
|
|
Isolate::Current()->AssertsEnabled()) {
|
|
Value* value = Bind(result);
|
|
result = new(Z) AssertBooleanInstr(node->token_pos(), value);
|
|
}
|
|
Value* value = Bind(result);
|
|
result = new(Z) BooleanNegateInstr(value);
|
|
}
|
|
ReturnDefinition(result);
|
|
return;
|
|
}
|
|
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(2);
|
|
|
|
ValueGraphVisitor for_left_value(owner());
|
|
node->left()->Visit(&for_left_value);
|
|
Append(for_left_value);
|
|
PushArgumentInstr* push_left = PushArgument(for_left_value.value());
|
|
arguments->Add(push_left);
|
|
|
|
ValueGraphVisitor for_right_value(owner());
|
|
node->right()->Visit(&for_right_value);
|
|
Append(for_right_value);
|
|
PushArgumentInstr* push_right = PushArgument(for_right_value.value());
|
|
arguments->Add(push_right);
|
|
|
|
ASSERT(Token::IsRelationalOperator(node->kind()));
|
|
InstanceCallInstr* comp = new(Z) InstanceCallInstr(
|
|
node->token_pos(),
|
|
String::ZoneHandle(Z, Symbols::New(node->TokenName())),
|
|
node->kind(),
|
|
arguments,
|
|
Object::null_array(),
|
|
2,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(comp);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitUnaryOpNode(UnaryOpNode* node) {
|
|
// "!" cannot be overloaded, therefore do not call operator.
|
|
if (node->kind() == Token::kNOT) {
|
|
ValueGraphVisitor for_value(owner());
|
|
node->operand()->Visit(&for_value);
|
|
Append(for_value);
|
|
Value* value = for_value.value();
|
|
if (Isolate::Current()->TypeChecksEnabled() ||
|
|
Isolate::Current()->AssertsEnabled()) {
|
|
value =
|
|
Bind(new(Z) AssertBooleanInstr(node->operand()->token_pos(), value));
|
|
}
|
|
BooleanNegateInstr* negate = new(Z) BooleanNegateInstr(value);
|
|
ReturnDefinition(negate);
|
|
return;
|
|
}
|
|
|
|
ValueGraphVisitor for_value(owner());
|
|
node->operand()->Visit(&for_value);
|
|
Append(for_value);
|
|
PushArgumentInstr* push_value = PushArgument(for_value.value());
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(1);
|
|
arguments->Add(push_value);
|
|
InstanceCallInstr* call = new(Z) InstanceCallInstr(
|
|
node->token_pos(),
|
|
String::ZoneHandle(Z, Symbols::New(node->TokenName())),
|
|
node->kind(),
|
|
arguments,
|
|
Object::null_array(),
|
|
1,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(call);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitConditionalExprNode(ConditionalExprNode* node) {
|
|
TestGraphVisitor for_test(owner(), node->condition()->token_pos());
|
|
node->condition()->Visit(&for_test);
|
|
|
|
// Translate the subexpressions for their effects.
|
|
EffectGraphVisitor for_true(owner());
|
|
node->true_expr()->Visit(&for_true);
|
|
EffectGraphVisitor for_false(owner());
|
|
node->false_expr()->Visit(&for_false);
|
|
|
|
Join(for_test, for_true, for_false);
|
|
}
|
|
|
|
|
|
void ValueGraphVisitor::VisitConditionalExprNode(ConditionalExprNode* node) {
|
|
TestGraphVisitor for_test(owner(), node->condition()->token_pos());
|
|
node->condition()->Visit(&for_test);
|
|
|
|
ValueGraphVisitor for_true(owner());
|
|
node->true_expr()->Visit(&for_true);
|
|
ASSERT(for_true.is_open());
|
|
for_true.Do(BuildStoreExprTemp(for_true.value()));
|
|
|
|
ValueGraphVisitor for_false(owner());
|
|
node->false_expr()->Visit(&for_false);
|
|
ASSERT(for_false.is_open());
|
|
for_false.Do(BuildStoreExprTemp(for_false.value()));
|
|
|
|
Join(for_test, for_true, for_false);
|
|
ReturnDefinition(BuildLoadExprTemp());
|
|
}
|
|
|
|
|
|
// <Statement> ::= If { condition: <Expression>
|
|
// true_branch: <Sequence>
|
|
// false_branch: <Sequence> }
|
|
void EffectGraphVisitor::VisitIfNode(IfNode* node) {
|
|
TestGraphVisitor for_test(owner(), node->condition()->token_pos());
|
|
node->condition()->Visit(&for_test);
|
|
|
|
EffectGraphVisitor for_true(owner());
|
|
EffectGraphVisitor for_false(owner());
|
|
|
|
node->true_branch()->Visit(&for_true);
|
|
// The for_false graph fragment will be empty (default graph fragment) if
|
|
// we do not call Visit.
|
|
if (node->false_branch() != NULL) node->false_branch()->Visit(&for_false);
|
|
Join(for_test, for_true, for_false);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitSwitchNode(SwitchNode* node) {
|
|
NestedSwitch nested_switch(owner(), node);
|
|
EffectGraphVisitor switch_body(owner());
|
|
node->body()->Visit(&switch_body);
|
|
Append(switch_body);
|
|
if (nested_switch.break_target() != NULL) {
|
|
if (is_open()) Goto(nested_switch.break_target());
|
|
exit_ = nested_switch.break_target();
|
|
}
|
|
}
|
|
|
|
|
|
// A case node contains zero or more case expressions, can contain default
|
|
// and a case statement body.
|
|
// Compose fragment as follows:
|
|
// - if no case expressions, must have default:
|
|
// a) target
|
|
// b) [ case-statements ]
|
|
//
|
|
// - if has 1 or more case statements
|
|
// a) target-0
|
|
// b) [ case-expression-0 ] -> (true-target-0, target-1)
|
|
// c) target-1
|
|
// d) [ case-expression-1 ] -> (true-target-1, exit-target)
|
|
// e) true-target-0 -> case-statements-join
|
|
// f) true-target-1 -> case-statements-join
|
|
// g) case-statements-join
|
|
// h) [ case-statements ] -> exit-join
|
|
// i) exit-target -> exit-join
|
|
// j) exit-join
|
|
//
|
|
// Note: The specification of switch/case is under discussion and may change
|
|
// drastically.
|
|
void EffectGraphVisitor::VisitCaseNode(CaseNode* node) {
|
|
const intptr_t len = node->case_expressions()->length();
|
|
// Create case statements instructions.
|
|
EffectGraphVisitor for_case_statements(owner());
|
|
// Compute the start of the statements fragment.
|
|
JoinEntryInstr* statement_start = NULL;
|
|
if (node->label() == NULL) {
|
|
statement_start = new(Z) JoinEntryInstr(owner()->AllocateBlockId(),
|
|
owner()->try_index());
|
|
} else {
|
|
// The case nodes are nested inside a SequenceNode that is the body of a
|
|
// SwitchNode. The SwitchNode on the nesting stack contains the
|
|
// continue labels for all the case clauses.
|
|
statement_start =
|
|
owner()->nesting_stack()->outer()->ContinueTargetFor(node->label());
|
|
}
|
|
ASSERT(statement_start != NULL);
|
|
node->statements()->Visit(&for_case_statements);
|
|
Instruction* statement_exit =
|
|
AppendFragment(statement_start, for_case_statements);
|
|
if (is_open() && (len == 0)) {
|
|
ASSERT(node->contains_default());
|
|
// Default only case node.
|
|
Goto(statement_start);
|
|
exit_ = statement_exit;
|
|
return;
|
|
}
|
|
|
|
// Generate instructions for all case expressions.
|
|
TargetEntryInstr* next_target = NULL;
|
|
for (intptr_t i = 0; i < len; i++) {
|
|
AstNode* case_expr = node->case_expressions()->NodeAt(i);
|
|
TestGraphVisitor for_case_expression(owner(), case_expr->token_pos());
|
|
case_expr->Visit(&for_case_expression);
|
|
if (i == 0) {
|
|
// Append only the first one, everything else is connected from it.
|
|
Append(for_case_expression);
|
|
} else {
|
|
ASSERT(next_target != NULL);
|
|
AppendFragment(next_target, for_case_expression);
|
|
}
|
|
for_case_expression.IfTrueGoto(statement_start);
|
|
next_target = for_case_expression.CreateFalseSuccessor()->AsTargetEntry();
|
|
}
|
|
|
|
// Once a test fragment has been added, this fragment is closed.
|
|
ASSERT(!is_open());
|
|
|
|
Instruction* exit_instruction = NULL;
|
|
// Handle last (or only) case: false goes to exit or to statement if this
|
|
// node contains default.
|
|
if (len > 0) {
|
|
ASSERT(next_target != NULL);
|
|
if (node->contains_default()) {
|
|
// True and false go to statement start.
|
|
next_target->Goto(statement_start);
|
|
exit_instruction = statement_exit;
|
|
} else {
|
|
if (statement_exit != NULL) {
|
|
JoinEntryInstr* join = new(Z) JoinEntryInstr(owner()->AllocateBlockId(),
|
|
owner()->try_index());
|
|
statement_exit->Goto(join);
|
|
next_target->Goto(join);
|
|
exit_instruction = join;
|
|
} else {
|
|
exit_instruction = next_target;
|
|
}
|
|
}
|
|
} else {
|
|
// A CaseNode without case expressions must contain default.
|
|
ASSERT(node->contains_default());
|
|
Goto(statement_start);
|
|
exit_instruction = statement_exit;
|
|
}
|
|
|
|
ASSERT(!is_open());
|
|
exit_ = exit_instruction;
|
|
}
|
|
|
|
|
|
// <Statement> ::= While { label: SourceLabel
|
|
// condition: <Expression>
|
|
// body: <Sequence> }
|
|
// The fragment is composed as follows:
|
|
// a) loop-join
|
|
// b) [ test_preamble ]?
|
|
// c) [ test ] -> (body-entry-target, loop-exit-target)
|
|
// d) body-entry-target
|
|
// e) [ body ] -> (continue-join)
|
|
// f) continue-join -> (loop-join)
|
|
// g) loop-exit-target
|
|
// h) break-join (optional)
|
|
void EffectGraphVisitor::VisitWhileNode(WhileNode* node) {
|
|
NestedLoop nested_loop(owner(), node->label());
|
|
|
|
EffectGraphVisitor for_preamble(owner());
|
|
if (node->condition_preamble() != NULL) {
|
|
node->condition_preamble()->Visit(&for_preamble);
|
|
}
|
|
|
|
TestGraphVisitor for_test(owner(), node->condition()->token_pos());
|
|
node->condition()->Visit(&for_test);
|
|
ASSERT(!for_test.is_empty()); // Language spec.
|
|
|
|
EffectGraphVisitor for_body(owner());
|
|
node->body()->Visit(&for_body);
|
|
|
|
// Labels are set after body traversal.
|
|
JoinEntryInstr* join = nested_loop.continue_target();
|
|
if (join != NULL) {
|
|
if (for_body.is_open()) for_body.Goto(join);
|
|
for_body.exit_ = join;
|
|
}
|
|
TieLoop(node->token_pos(), for_test, for_body, for_preamble);
|
|
join = nested_loop.break_target();
|
|
if (join != NULL) {
|
|
Goto(join);
|
|
exit_ = join;
|
|
}
|
|
}
|
|
|
|
|
|
// The fragment is composed as follows:
|
|
// a) body-entry-join
|
|
// b) [ body ]
|
|
// c) test-entry (continue-join or body-exit-target)
|
|
// d) [ test-entry ] -> (back-target, loop-exit-target)
|
|
// e) back-target -> (body-entry-join)
|
|
// f) loop-exit-target
|
|
// g) break-join
|
|
void EffectGraphVisitor::VisitDoWhileNode(DoWhileNode* node) {
|
|
NestedLoop nested_loop(owner(), node->label());
|
|
|
|
// Traverse the body first in order to generate continue and break labels.
|
|
EffectGraphVisitor for_body(owner());
|
|
node->body()->Visit(&for_body);
|
|
|
|
TestGraphVisitor for_test(owner(), node->condition()->token_pos());
|
|
node->condition()->Visit(&for_test);
|
|
ASSERT(is_open());
|
|
|
|
// Tie do-while loop (test is after the body).
|
|
JoinEntryInstr* body_entry_join =
|
|
new(Z) JoinEntryInstr(owner()->AllocateBlockId(),
|
|
owner()->try_index());
|
|
Goto(body_entry_join);
|
|
Instruction* body_exit = AppendFragment(body_entry_join, for_body);
|
|
|
|
JoinEntryInstr* join = nested_loop.continue_target();
|
|
if ((body_exit != NULL) || (join != NULL)) {
|
|
if (join == NULL) {
|
|
join = new(Z) JoinEntryInstr(owner()->AllocateBlockId(),
|
|
owner()->try_index());
|
|
}
|
|
CheckStackOverflowInstr* check = new(Z) CheckStackOverflowInstr(
|
|
node->token_pos(), owner()->loop_depth());
|
|
join->LinkTo(check);
|
|
check->LinkTo(for_test.entry());
|
|
if (body_exit != NULL) {
|
|
body_exit->Goto(join);
|
|
}
|
|
}
|
|
|
|
for_test.IfTrueGoto(body_entry_join);
|
|
join = nested_loop.break_target();
|
|
if (join == NULL) {
|
|
exit_ = for_test.CreateFalseSuccessor();
|
|
} else {
|
|
for_test.IfFalseGoto(join);
|
|
exit_ = join;
|
|
}
|
|
}
|
|
|
|
|
|
// A ForNode can contain break and continue jumps. 'break' joins to
|
|
// ForNode exit, 'continue' joins at increment entry. The fragment is composed
|
|
// as follows:
|
|
// a) [ initializer ]
|
|
// b) loop-join
|
|
// c) [ test ] -> (body-entry-target, loop-exit-target)
|
|
// d) body-entry-target
|
|
// e) [ body ]
|
|
// f) continue-join (optional)
|
|
// g) [ increment ] -> (loop-join)
|
|
// h) loop-exit-target
|
|
// i) break-join
|
|
void EffectGraphVisitor::VisitForNode(ForNode* node) {
|
|
EffectGraphVisitor for_initializer(owner());
|
|
node->initializer()->Visit(&for_initializer);
|
|
Append(for_initializer);
|
|
ASSERT(is_open());
|
|
|
|
NestedLoop nested_loop(owner(), node->label());
|
|
// Compose body to set any jump labels.
|
|
EffectGraphVisitor for_body(owner());
|
|
node->body()->Visit(&for_body);
|
|
|
|
EffectGraphVisitor for_increment(owner());
|
|
node->increment()->Visit(&for_increment);
|
|
|
|
// Join the loop body and increment and then tie the loop.
|
|
JoinEntryInstr* continue_join = nested_loop.continue_target();
|
|
if ((continue_join != NULL) || for_body.is_open()) {
|
|
JoinEntryInstr* loop_entry =
|
|
new(Z) JoinEntryInstr(owner()->AllocateBlockId(), owner()->try_index());
|
|
if (continue_join != NULL) {
|
|
if (for_body.is_open()) for_body.Goto(continue_join);
|
|
Instruction* current = AppendFragment(continue_join, for_increment);
|
|
current->Goto(loop_entry);
|
|
} else {
|
|
for_body.Append(for_increment);
|
|
for_body.Goto(loop_entry);
|
|
}
|
|
Goto(loop_entry);
|
|
exit_ = loop_entry;
|
|
AddInstruction(
|
|
new(Z) CheckStackOverflowInstr(node->token_pos(),
|
|
owner()->loop_depth()));
|
|
}
|
|
|
|
if (node->condition() == NULL) {
|
|
// Endless loop, no test.
|
|
Append(for_body);
|
|
exit_ = nested_loop.break_target(); // May be NULL.
|
|
} else {
|
|
EffectGraphVisitor for_test_preamble(owner());
|
|
if (node->condition_preamble() != NULL) {
|
|
node->condition_preamble()->Visit(&for_test_preamble);
|
|
Append(for_test_preamble);
|
|
}
|
|
|
|
TestGraphVisitor for_test(owner(), node->condition()->token_pos());
|
|
node->condition()->Visit(&for_test);
|
|
Append(for_test);
|
|
|
|
BlockEntryInstr* body_entry = for_test.CreateTrueSuccessor();
|
|
AppendFragment(body_entry, for_body);
|
|
|
|
if (nested_loop.break_target() == NULL) {
|
|
exit_ = for_test.CreateFalseSuccessor();
|
|
} else {
|
|
for_test.IfFalseGoto(nested_loop.break_target());
|
|
exit_ = nested_loop.break_target();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitJumpNode(JumpNode* node) {
|
|
for (intptr_t i = 0; i < node->inlined_finally_list_length(); i++) {
|
|
EffectGraphVisitor for_effect(owner());
|
|
node->InlinedFinallyNodeAt(i)->Visit(&for_effect);
|
|
Append(for_effect);
|
|
if (!is_open()) return;
|
|
}
|
|
|
|
// Unchain the context(s) up to the outer context level of the scope which
|
|
// contains the destination label.
|
|
SourceLabel* label = node->label();
|
|
ASSERT(label->owner() != NULL);
|
|
int target_context_level = 0;
|
|
LocalScope* target_scope = label->owner();
|
|
if (target_scope->num_context_variables() > 0) {
|
|
// The scope of the target label allocates a context, therefore its outer
|
|
// scope is at a lower context level.
|
|
target_context_level = target_scope->context_level() - 1;
|
|
} else {
|
|
// The scope of the target label does not allocate a context, so its outer
|
|
// scope is at the same context level. Find it.
|
|
while ((target_scope != NULL) &&
|
|
(target_scope->num_context_variables() == 0)) {
|
|
target_scope = target_scope->parent();
|
|
}
|
|
if (target_scope != NULL) {
|
|
target_context_level = target_scope->context_level();
|
|
}
|
|
}
|
|
ASSERT(target_context_level >= 0);
|
|
intptr_t current_context_level = owner()->context_level();
|
|
ASSERT(current_context_level >= target_context_level);
|
|
UnchainContexts(current_context_level - target_context_level);
|
|
|
|
JoinEntryInstr* jump_target = NULL;
|
|
NestedStatement* current = owner()->nesting_stack();
|
|
while (current != NULL) {
|
|
jump_target = (node->kind() == Token::kBREAK)
|
|
? current->BreakTargetFor(node->label())
|
|
: current->ContinueTargetFor(node->label());
|
|
if (jump_target != NULL) break;
|
|
current = current->outer();
|
|
}
|
|
ASSERT(jump_target != NULL);
|
|
Goto(jump_target);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitArgumentListNode(ArgumentListNode* node) {
|
|
UNREACHABLE();
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitAwaitNode(AwaitNode* node) {
|
|
// Await nodes are temporary during parsing.
|
|
UNREACHABLE();
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitAwaitMarkerNode(AwaitMarkerNode* node) {
|
|
// We need to create a new await state which involves:
|
|
// * Increase the jump counter. Sanity check against the list of targets.
|
|
// * Save the current context for resuming.
|
|
ASSERT(node->scope() != NULL);
|
|
LocalVariable* jump_var = node->scope()->LookupVariable(
|
|
Symbols::AwaitJumpVar(), false);
|
|
LocalVariable* ctx_var = node->scope()->LookupVariable(
|
|
Symbols::AwaitContextVar(), false);
|
|
ASSERT((jump_var != NULL) && jump_var->is_captured());
|
|
ASSERT((ctx_var != NULL) && ctx_var->is_captured());
|
|
const intptr_t jump_count = owner()->next_await_counter();
|
|
ASSERT(jump_count >= 0);
|
|
// Sanity check that we always add a JoinEntryInstr before adding a new
|
|
// state.
|
|
ASSERT(jump_count == owner()->await_joins()->length());
|
|
// Store the counter in :await_jump_var.
|
|
Value* jump_val = Bind(new(Z) ConstantInstr(
|
|
Smi::ZoneHandle(Z, Smi::New(jump_count))));
|
|
Do(BuildStoreLocal(*jump_var, jump_val));
|
|
// Save the current context for resuming.
|
|
BuildSaveContext(*ctx_var);
|
|
owner()->await_levels()->Add(owner()->context_level());
|
|
}
|
|
|
|
|
|
intptr_t EffectGraphVisitor::GetCurrentTempLocalIndex() const {
|
|
return kFirstLocalSlotFromFp
|
|
- owner()->num_stack_locals()
|
|
- owner()->num_copied_params()
|
|
- owner()->args_pushed()
|
|
- owner()->temp_count() + 1;
|
|
}
|
|
|
|
|
|
LocalVariable* EffectGraphVisitor::EnterTempLocalScope(Value* value) {
|
|
Do(new(Z) PushTempInstr(value));
|
|
owner()->AllocateTemp();
|
|
|
|
ASSERT(value->definition()->temp_index() == (owner()->temp_count() - 1));
|
|
intptr_t index = GetCurrentTempLocalIndex();
|
|
char name[64];
|
|
OS::SNPrint(name, 64, ":tmp_local%" Pd, index);
|
|
LocalVariable* var =
|
|
new(Z) LocalVariable(0,
|
|
String::ZoneHandle(Z, Symbols::New(name)),
|
|
*value->Type()->ToAbstractType());
|
|
var->set_index(index);
|
|
return var;
|
|
}
|
|
|
|
|
|
Definition* EffectGraphVisitor::ExitTempLocalScope(LocalVariable* var) {
|
|
Value* tmp = Bind(new(Z) LoadLocalInstr(*var));
|
|
owner()->DeallocateTemps(1);
|
|
ASSERT(GetCurrentTempLocalIndex() == var->index());
|
|
return new(Z) DropTempsInstr(1, tmp);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildLetTempExpressions(LetNode* node) {
|
|
intptr_t num_temps = node->num_temps();
|
|
for (intptr_t i = 0; i < num_temps; ++i) {
|
|
ValueGraphVisitor for_value(owner());
|
|
node->InitializerAt(i)->Visit(&for_value);
|
|
Append(for_value);
|
|
Value* temp_val = for_value.value();
|
|
ASSERT(!node->TempAt(i)->HasIndex() ||
|
|
(node->TempAt(i)->index() == GetCurrentTempLocalIndex()));
|
|
node->TempAt(i)->set_index(GetCurrentTempLocalIndex());
|
|
Do(new(Z) PushTempInstr(temp_val));
|
|
owner()->AllocateTemp();
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitLetNode(LetNode* node) {
|
|
BuildLetTempExpressions(node);
|
|
|
|
// Visit body.
|
|
for (intptr_t i = 0; i < node->nodes().length(); ++i) {
|
|
EffectGraphVisitor for_effect(owner());
|
|
node->nodes()[i]->Visit(&for_effect);
|
|
Append(for_effect);
|
|
}
|
|
|
|
intptr_t num_temps = node->num_temps();
|
|
if (num_temps > 0) {
|
|
owner()->DeallocateTemps(num_temps);
|
|
Do(new(Z) DropTempsInstr(num_temps, NULL));
|
|
}
|
|
}
|
|
|
|
|
|
void ValueGraphVisitor::VisitLetNode(LetNode* node) {
|
|
BuildLetTempExpressions(node);
|
|
|
|
// Visit body.
|
|
for (intptr_t i = 0; i < node->nodes().length() - 1; ++i) {
|
|
EffectGraphVisitor for_effect(owner());
|
|
node->nodes()[i]->Visit(&for_effect);
|
|
Append(for_effect);
|
|
}
|
|
// Visit the last body expression for value.
|
|
ValueGraphVisitor for_value(owner());
|
|
node->nodes().Last()->Visit(&for_value);
|
|
Append(for_value);
|
|
Value* result_value = for_value.value();
|
|
|
|
intptr_t num_temps = node->num_temps();
|
|
if (num_temps > 0) {
|
|
owner()->DeallocateTemps(num_temps);
|
|
ReturnDefinition(new(Z) DropTempsInstr(num_temps, result_value));
|
|
} else {
|
|
ReturnValue(result_value);
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitArrayNode(ArrayNode* node) {
|
|
const TypeArguments& type_args =
|
|
TypeArguments::ZoneHandle(Z, node->type().arguments());
|
|
Value* element_type = BuildInstantiatedTypeArguments(node->token_pos(),
|
|
type_args);
|
|
Value* num_elements =
|
|
Bind(new(Z) ConstantInstr(Smi::ZoneHandle(Z, Smi::New(node->length()))));
|
|
CreateArrayInstr* create = new(Z) CreateArrayInstr(node->token_pos(),
|
|
element_type,
|
|
num_elements);
|
|
Value* array_val = Bind(create);
|
|
|
|
{ LocalVariable* tmp_var = EnterTempLocalScope(array_val);
|
|
const intptr_t class_id = kArrayCid;
|
|
const intptr_t deopt_id = Isolate::kNoDeoptId;
|
|
for (int i = 0; i < node->length(); ++i) {
|
|
Value* array = Bind(new(Z) LoadLocalInstr(*tmp_var));
|
|
Value* index =
|
|
Bind(new(Z) ConstantInstr(Smi::ZoneHandle(Z, Smi::New(i))));
|
|
ValueGraphVisitor for_value(owner());
|
|
node->ElementAt(i)->Visit(&for_value);
|
|
Append(for_value);
|
|
// No store barrier needed for constants.
|
|
const StoreBarrierType emit_store_barrier =
|
|
for_value.value()->BindsToConstant()
|
|
? kNoStoreBarrier
|
|
: kEmitStoreBarrier;
|
|
const intptr_t index_scale = Instance::ElementSizeFor(class_id);
|
|
StoreIndexedInstr* store = new(Z) StoreIndexedInstr(
|
|
array, index, for_value.value(), emit_store_barrier,
|
|
index_scale, class_id, deopt_id, node->token_pos());
|
|
Do(store);
|
|
}
|
|
ReturnDefinition(ExitTempLocalScope(tmp_var));
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitStringInterpolateNode(
|
|
StringInterpolateNode* node) {
|
|
ValueGraphVisitor for_argument(owner());
|
|
ArrayNode* arguments = node->value();
|
|
if (arguments->length() == 1) {
|
|
ZoneGrowableArray<PushArgumentInstr*>* values =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(1);
|
|
arguments->ElementAt(0)->Visit(&for_argument);
|
|
Append(for_argument);
|
|
PushArgumentInstr* push_arg = PushArgument(for_argument.value());
|
|
values->Add(push_arg);
|
|
const int kNumberOfArguments = 1;
|
|
const Array& kNoArgumentNames = Object::null_array();
|
|
const Class& cls =
|
|
Class::Handle(Library::LookupCoreClass(Symbols::StringBase()));
|
|
ASSERT(!cls.IsNull());
|
|
const Function& function = Function::ZoneHandle(
|
|
Z,
|
|
Resolver::ResolveStatic(
|
|
cls,
|
|
Library::PrivateCoreLibName(Symbols::InterpolateSingle()),
|
|
kNumberOfArguments,
|
|
kNoArgumentNames));
|
|
StaticCallInstr* call =
|
|
new(Z) StaticCallInstr(node->token_pos(),
|
|
function,
|
|
kNoArgumentNames,
|
|
values,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(call);
|
|
return;
|
|
}
|
|
arguments->Visit(&for_argument);
|
|
Append(for_argument);
|
|
StringInterpolateInstr* instr =
|
|
new(Z) StringInterpolateInstr(for_argument.value(), node->token_pos());
|
|
ReturnDefinition(instr);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitClosureNode(ClosureNode* node) {
|
|
const Function& function = node->function();
|
|
|
|
if (function.IsImplicitStaticClosureFunction()) {
|
|
const Instance& closure =
|
|
Instance::ZoneHandle(Z, function.ImplicitStaticClosure());
|
|
ReturnDefinition(new(Z) ConstantInstr(closure));
|
|
return;
|
|
}
|
|
const bool is_implicit = function.IsImplicitInstanceClosureFunction();
|
|
ASSERT(is_implicit || function.IsNonImplicitClosureFunction());
|
|
// The context scope may have already been set by the non-optimizing
|
|
// compiler. If it was not, set it here.
|
|
if (function.context_scope() == ContextScope::null()) {
|
|
ASSERT(!is_implicit);
|
|
const ContextScope& context_scope = ContextScope::ZoneHandle(
|
|
Z, node->scope()->PreserveOuterScope(owner()->context_level()));
|
|
ASSERT(!function.HasCode());
|
|
ASSERT(function.context_scope() == ContextScope::null());
|
|
function.set_context_scope(context_scope);
|
|
const Class& cls = Class::Handle(Z, owner()->function().Owner());
|
|
// The closure is now properly setup, add it to the lookup table.
|
|
// It is possible that the compiler creates more than one function
|
|
// object for the same closure, e.g. when inlining nodes from
|
|
// finally clauses. If we already have a function object for the
|
|
// same closure, do not add a second one. We compare the origin
|
|
// class, token position, and parent function to detect duplicates.
|
|
// Note that we can have two different closure object for the same
|
|
// source text representation of the closure: one with a non-closurized
|
|
// parent, and one with a closurized parent function.
|
|
|
|
const Function& found_func = Function::Handle(
|
|
Z, cls.LookupClosureFunction(function.token_pos()));
|
|
|
|
if (found_func.IsNull() ||
|
|
(found_func.token_pos() != function.token_pos()) ||
|
|
(found_func.script() != function.script()) ||
|
|
(found_func.parent_function() != function.parent_function())) {
|
|
cls.AddClosureFunction(function);
|
|
}
|
|
}
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(1);
|
|
ASSERT(function.context_scope() != ContextScope::null());
|
|
|
|
// The function type of a closure may have type arguments. In that case,
|
|
// pass the type arguments of the instantiator.
|
|
const Class& cls = Class::ZoneHandle(Z, function.signature_class());
|
|
ASSERT(!cls.IsNull());
|
|
const bool requires_type_arguments = cls.NumTypeArguments() > 0;
|
|
Value* type_arguments = NULL;
|
|
if (requires_type_arguments) {
|
|
ASSERT(cls.type_arguments_field_offset() ==
|
|
Closure::type_arguments_offset());
|
|
ASSERT(cls.instance_size() == Closure::InstanceSize());
|
|
const Class& instantiator_class = Class::Handle(
|
|
Z, owner()->function().Owner());
|
|
type_arguments = BuildInstantiatorTypeArguments(node->token_pos(),
|
|
instantiator_class,
|
|
NULL);
|
|
arguments->Add(PushArgument(type_arguments));
|
|
}
|
|
AllocateObjectInstr* alloc = new(Z) AllocateObjectInstr(node->token_pos(),
|
|
cls,
|
|
arguments);
|
|
alloc->set_closure_function(function);
|
|
|
|
Value* closure_val = Bind(alloc);
|
|
{ LocalVariable* closure_tmp_var = EnterTempLocalScope(closure_val);
|
|
// Store function.
|
|
Value* closure_tmp_val = Bind(new(Z) LoadLocalInstr(*closure_tmp_var));
|
|
Value* func_val =
|
|
Bind(new(Z) ConstantInstr(Function::ZoneHandle(Z, function.raw())));
|
|
Do(new(Z) StoreInstanceFieldInstr(Closure::function_offset(),
|
|
closure_tmp_val,
|
|
func_val,
|
|
kEmitStoreBarrier,
|
|
node->token_pos()));
|
|
if (is_implicit) {
|
|
// Create new context containing the receiver.
|
|
const intptr_t kNumContextVariables = 1; // The receiver.
|
|
Value* allocated_context =
|
|
Bind(new(Z) AllocateContextInstr(node->token_pos(),
|
|
kNumContextVariables));
|
|
{ LocalVariable* context_tmp_var = EnterTempLocalScope(allocated_context);
|
|
// Store receiver in context.
|
|
Value* context_tmp_val = Bind(new(Z) LoadLocalInstr(*context_tmp_var));
|
|
ValueGraphVisitor for_receiver(owner());
|
|
node->receiver()->Visit(&for_receiver);
|
|
Append(for_receiver);
|
|
Value* receiver = for_receiver.value();
|
|
Do(new(Z) StoreInstanceFieldInstr(Context::variable_offset(0),
|
|
context_tmp_val,
|
|
receiver,
|
|
kEmitStoreBarrier,
|
|
node->token_pos()));
|
|
// Store new context in closure.
|
|
closure_tmp_val = Bind(new(Z) LoadLocalInstr(*closure_tmp_var));
|
|
context_tmp_val = Bind(new(Z) LoadLocalInstr(*context_tmp_var));
|
|
Do(new(Z) StoreInstanceFieldInstr(Closure::context_offset(),
|
|
closure_tmp_val,
|
|
context_tmp_val,
|
|
kEmitStoreBarrier,
|
|
node->token_pos()));
|
|
Do(ExitTempLocalScope(context_tmp_var));
|
|
}
|
|
} else {
|
|
// Store current context in closure.
|
|
closure_tmp_val = Bind(new(Z) LoadLocalInstr(*closure_tmp_var));
|
|
Value* context = Bind(BuildCurrentContext());
|
|
Do(new(Z) StoreInstanceFieldInstr(Closure::context_offset(),
|
|
closure_tmp_val,
|
|
context,
|
|
kEmitStoreBarrier,
|
|
node->token_pos()));
|
|
}
|
|
ReturnDefinition(ExitTempLocalScope(closure_tmp_var));
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildPushArguments(
|
|
const ArgumentListNode& node,
|
|
ZoneGrowableArray<PushArgumentInstr*>* values) {
|
|
for (intptr_t i = 0; i < node.length(); ++i) {
|
|
ValueGraphVisitor for_argument(owner());
|
|
node.NodeAt(i)->Visit(&for_argument);
|
|
Append(for_argument);
|
|
PushArgumentInstr* push_arg = PushArgument(for_argument.value());
|
|
values->Add(push_arg);
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitInstanceCallNode(InstanceCallNode* node) {
|
|
ValueGraphVisitor for_receiver(owner());
|
|
node->receiver()->Visit(&for_receiver);
|
|
Append(for_receiver);
|
|
PushArgumentInstr* push_receiver = PushArgument(for_receiver.value());
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(
|
|
node->arguments()->length() + 1);
|
|
arguments->Add(push_receiver);
|
|
|
|
BuildPushArguments(*node->arguments(), arguments);
|
|
InstanceCallInstr* call = new(Z) InstanceCallInstr(
|
|
node->token_pos(),
|
|
node->function_name(),
|
|
Token::kILLEGAL,
|
|
arguments,
|
|
node->arguments()->names(),
|
|
1,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(call);
|
|
}
|
|
|
|
|
|
static intptr_t GetResultCidOfNativeFactory(const Function& function) {
|
|
const Class& function_class = Class::Handle(function.Owner());
|
|
if (function_class.library() == Library::TypedDataLibrary()) {
|
|
const String& function_name = String::Handle(function.name());
|
|
if (!String::EqualsIgnoringPrivateKey(function_name, Symbols::_New())) {
|
|
return kDynamicCid;
|
|
}
|
|
switch (function_class.id()) {
|
|
case kTypedDataInt8ArrayCid:
|
|
case kTypedDataUint8ArrayCid:
|
|
case kTypedDataUint8ClampedArrayCid:
|
|
case kTypedDataInt16ArrayCid:
|
|
case kTypedDataUint16ArrayCid:
|
|
case kTypedDataInt32ArrayCid:
|
|
case kTypedDataUint32ArrayCid:
|
|
case kTypedDataInt64ArrayCid:
|
|
case kTypedDataUint64ArrayCid:
|
|
case kTypedDataFloat32ArrayCid:
|
|
case kTypedDataFloat64ArrayCid:
|
|
case kTypedDataFloat32x4ArrayCid:
|
|
case kTypedDataInt32x4ArrayCid:
|
|
return function_class.id();
|
|
default:
|
|
return kDynamicCid; // Unknown.
|
|
}
|
|
}
|
|
return kDynamicCid;
|
|
}
|
|
|
|
|
|
// <Expression> ::= StaticCall { function: Function
|
|
// arguments: <ArgumentList> }
|
|
void EffectGraphVisitor::VisitStaticCallNode(StaticCallNode* node) {
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(node->arguments()->length());
|
|
BuildPushArguments(*node->arguments(), arguments);
|
|
StaticCallInstr* call =
|
|
new(Z) StaticCallInstr(node->token_pos(),
|
|
node->function(),
|
|
node->arguments()->names(),
|
|
arguments,
|
|
owner()->ic_data_array());
|
|
if (node->function().is_native()) {
|
|
const intptr_t result_cid = GetResultCidOfNativeFactory(node->function());
|
|
if (result_cid != kDynamicCid) {
|
|
call->set_result_cid(result_cid);
|
|
call->set_is_native_list_factory(true);
|
|
}
|
|
}
|
|
ReturnDefinition(call);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildClosureCall(
|
|
ClosureCallNode* node, bool result_needed) {
|
|
ValueGraphVisitor for_closure(owner());
|
|
node->closure()->Visit(&for_closure);
|
|
Append(for_closure);
|
|
|
|
LocalVariable* tmp_var = EnterTempLocalScope(for_closure.value());
|
|
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(node->arguments()->length());
|
|
Value* closure_val = Bind(new(Z) LoadLocalInstr(*tmp_var));
|
|
PushArgumentInstr* push_closure = PushArgument(closure_val);
|
|
arguments->Add(push_closure);
|
|
BuildPushArguments(*node->arguments(), arguments);
|
|
|
|
closure_val = Bind(new(Z) LoadLocalInstr(*tmp_var));
|
|
LoadFieldInstr* function_load = new(Z) LoadFieldInstr(
|
|
closure_val,
|
|
Closure::function_offset(),
|
|
AbstractType::ZoneHandle(Z, AbstractType::null()),
|
|
node->token_pos());
|
|
function_load->set_is_immutable(true);
|
|
Value* function_val = Bind(function_load);
|
|
|
|
Definition* closure_call =
|
|
new(Z) ClosureCallInstr(function_val, node, arguments);
|
|
if (result_needed) {
|
|
Value* result = Bind(closure_call);
|
|
Do(new(Z) StoreLocalInstr(*tmp_var, result));
|
|
} else {
|
|
Do(closure_call);
|
|
}
|
|
ReturnDefinition(ExitTempLocalScope(tmp_var));
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitClosureCallNode(ClosureCallNode* node) {
|
|
BuildClosureCall(node, false);
|
|
}
|
|
|
|
|
|
void ValueGraphVisitor::VisitClosureCallNode(ClosureCallNode* node) {
|
|
BuildClosureCall(node, true);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitInitStaticFieldNode(InitStaticFieldNode* node) {
|
|
Value* field = Bind(new(Z) ConstantInstr(node->field()));
|
|
AddInstruction(new(Z) InitStaticFieldInstr(field, node->field()));
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitCloneContextNode(CloneContextNode* node) {
|
|
Value* context = Bind(BuildCurrentContext());
|
|
Value* clone = Bind(new(Z) CloneContextInstr(node->token_pos(), context));
|
|
Do(BuildStoreContext(clone));
|
|
}
|
|
|
|
|
|
Value* EffectGraphVisitor::BuildObjectAllocation(ConstructorCallNode* node) {
|
|
const Class& cls = Class::ZoneHandle(Z, node->constructor().Owner());
|
|
const bool cls_is_parameterized = cls.NumTypeArguments() > 0;
|
|
|
|
ZoneGrowableArray<PushArgumentInstr*>* allocate_arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(
|
|
cls_is_parameterized ? 1 : 0);
|
|
if (cls_is_parameterized) {
|
|
Value* type_args = BuildInstantiatedTypeArguments(node->token_pos(),
|
|
node->type_arguments());
|
|
allocate_arguments->Add(PushArgument(type_args));
|
|
}
|
|
|
|
Definition* allocation = new(Z) AllocateObjectInstr(
|
|
node->token_pos(),
|
|
Class::ZoneHandle(Z, node->constructor().Owner()),
|
|
allocate_arguments);
|
|
|
|
return Bind(allocation);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildConstructorCall(
|
|
ConstructorCallNode* node,
|
|
PushArgumentInstr* push_alloc_value) {
|
|
Value* ctor_arg = Bind(new(Z) ConstantInstr(
|
|
Smi::ZoneHandle(Z, Smi::New(Function::kCtorPhaseAll))));
|
|
PushArgumentInstr* push_ctor_arg = PushArgument(ctor_arg);
|
|
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(2);
|
|
arguments->Add(push_alloc_value);
|
|
arguments->Add(push_ctor_arg);
|
|
|
|
BuildPushArguments(*node->arguments(), arguments);
|
|
Do(new(Z) StaticCallInstr(node->token_pos(),
|
|
node->constructor(),
|
|
node->arguments()->names(),
|
|
arguments,
|
|
owner()->ic_data_array()));
|
|
}
|
|
|
|
|
|
static intptr_t GetResultCidOfListFactory(ConstructorCallNode* node) {
|
|
const Function& function = node->constructor();
|
|
const Class& function_class = Class::Handle(function.Owner());
|
|
|
|
if ((function_class.library() != Library::CoreLibrary()) &&
|
|
(function_class.library() != Library::TypedDataLibrary())) {
|
|
return kDynamicCid;
|
|
}
|
|
|
|
if (node->constructor().IsFactory()) {
|
|
if ((function_class.Name() == Symbols::List().raw()) &&
|
|
(function.name() == Symbols::ListFactory().raw())) {
|
|
// Special recognition of 'new List()' vs 'new List(n)'.
|
|
if (node->arguments()->length() == 0) {
|
|
return kGrowableObjectArrayCid;
|
|
}
|
|
return kArrayCid;
|
|
}
|
|
return FactoryRecognizer::ResultCid(function);
|
|
}
|
|
return kDynamicCid; // Not a known list constructor.
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitConstructorCallNode(ConstructorCallNode* node) {
|
|
if (node->constructor().IsFactory()) {
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>();
|
|
PushArgumentInstr* push_type_arguments = PushArgument(
|
|
BuildInstantiatedTypeArguments(node->token_pos(),
|
|
node->type_arguments()));
|
|
arguments->Add(push_type_arguments);
|
|
ASSERT(arguments->length() == 1);
|
|
BuildPushArguments(*node->arguments(), arguments);
|
|
StaticCallInstr* call =
|
|
new(Z) StaticCallInstr(node->token_pos(),
|
|
node->constructor(),
|
|
node->arguments()->names(),
|
|
arguments,
|
|
owner()->ic_data_array());
|
|
const intptr_t result_cid = GetResultCidOfListFactory(node);
|
|
if (result_cid != kDynamicCid) {
|
|
call->set_result_cid(result_cid);
|
|
call->set_is_known_list_constructor(true);
|
|
// Recognized fixed length array factory must have two arguments:
|
|
// (0) type-arguments, (1) length.
|
|
ASSERT(!LoadFieldInstr::IsFixedLengthArrayCid(result_cid) ||
|
|
arguments->length() == 2);
|
|
}
|
|
ReturnDefinition(call);
|
|
return;
|
|
}
|
|
// t_n contains the allocated and initialized object.
|
|
// t_n <- AllocateObject(class)
|
|
// t_n+1 <- ctor-arg
|
|
// t_n+2... <- constructor arguments start here
|
|
// StaticCall(constructor, t_n+1, t_n+2, ...)
|
|
// No need to preserve allocated value (simpler than in ValueGraphVisitor).
|
|
Value* allocated_value = BuildObjectAllocation(node);
|
|
PushArgumentInstr* push_allocated_value = PushArgument(allocated_value);
|
|
BuildConstructorCall(node, push_allocated_value);
|
|
}
|
|
|
|
|
|
Value* EffectGraphVisitor::BuildInstantiator(const Class& instantiator_class) {
|
|
ASSERT(instantiator_class.NumTypeParameters() > 0);
|
|
Function& outer_function = Function::Handle(Z, owner()->function().raw());
|
|
while (outer_function.IsLocalFunction()) {
|
|
outer_function = outer_function.parent_function();
|
|
}
|
|
if (outer_function.IsFactory()) {
|
|
return NULL;
|
|
}
|
|
|
|
LocalVariable* instantiator = owner()->parsed_function().instantiator();
|
|
ASSERT(instantiator != NULL);
|
|
Value* result = Bind(BuildLoadLocal(*instantiator));
|
|
return result;
|
|
}
|
|
|
|
|
|
// 'expression_temp_var' may not be used inside this method if 'instantiator'
|
|
// is not NULL.
|
|
Value* EffectGraphVisitor::BuildInstantiatorTypeArguments(
|
|
intptr_t token_pos,
|
|
const Class& instantiator_class,
|
|
Value* instantiator) {
|
|
if (instantiator_class.NumTypeParameters() == 0) {
|
|
// The type arguments are compile time constants.
|
|
TypeArguments& type_arguments =
|
|
TypeArguments::ZoneHandle(Z, TypeArguments::null());
|
|
// Type is temporary. Only its type arguments are preserved.
|
|
Type& type = Type::Handle(
|
|
Z,
|
|
Type::New(instantiator_class, type_arguments, token_pos, Heap::kNew));
|
|
type ^= ClassFinalizer::FinalizeType(
|
|
instantiator_class, type, ClassFinalizer::kFinalize);
|
|
ASSERT(!type.IsMalformedOrMalbounded());
|
|
type_arguments = type.arguments();
|
|
type_arguments = type_arguments.Canonicalize();
|
|
return Bind(new(Z) ConstantInstr(type_arguments));
|
|
}
|
|
Function& outer_function = Function::Handle(Z, owner()->function().raw());
|
|
while (outer_function.IsLocalFunction()) {
|
|
outer_function = outer_function.parent_function();
|
|
}
|
|
if (outer_function.IsFactory()) {
|
|
// No instantiator for factories.
|
|
ASSERT(instantiator == NULL);
|
|
LocalVariable* instantiator_var =
|
|
owner()->parsed_function().instantiator();
|
|
ASSERT(instantiator_var != NULL);
|
|
return Bind(BuildLoadLocal(*instantiator_var));
|
|
}
|
|
if (instantiator == NULL) {
|
|
instantiator = BuildInstantiator(instantiator_class);
|
|
}
|
|
// The instantiator is the receiver of the caller, which is not a factory.
|
|
// The receiver cannot be null; extract its TypeArguments object.
|
|
// Note that in the factory case, the instantiator is the first parameter
|
|
// of the factory, i.e. already a TypeArguments object.
|
|
intptr_t type_arguments_field_offset =
|
|
instantiator_class.type_arguments_field_offset();
|
|
ASSERT(type_arguments_field_offset != Class::kNoTypeArguments);
|
|
|
|
return Bind(new(Z) LoadFieldInstr(
|
|
instantiator,
|
|
type_arguments_field_offset,
|
|
Type::ZoneHandle(Z, Type::null()), // Not an instance, no type.
|
|
Scanner::kNoSourcePos));
|
|
}
|
|
|
|
|
|
Value* EffectGraphVisitor::BuildInstantiatedTypeArguments(
|
|
intptr_t token_pos,
|
|
const TypeArguments& type_arguments) {
|
|
if (type_arguments.IsNull() || type_arguments.IsInstantiated()) {
|
|
return Bind(new(Z) ConstantInstr(type_arguments));
|
|
}
|
|
// The type arguments are uninstantiated.
|
|
const Class& instantiator_class = Class::ZoneHandle(
|
|
Z, owner()->function().Owner());
|
|
Value* instantiator_value =
|
|
BuildInstantiatorTypeArguments(token_pos, instantiator_class, NULL);
|
|
const bool use_instantiator_type_args =
|
|
type_arguments.IsUninstantiatedIdentity() ||
|
|
type_arguments.CanShareInstantiatorTypeArguments(instantiator_class);
|
|
if (use_instantiator_type_args) {
|
|
return instantiator_value;
|
|
} else {
|
|
return Bind(new(Z) InstantiateTypeArgumentsInstr(token_pos,
|
|
type_arguments,
|
|
instantiator_class,
|
|
instantiator_value));
|
|
}
|
|
}
|
|
|
|
|
|
void ValueGraphVisitor::VisitConstructorCallNode(ConstructorCallNode* node) {
|
|
if (node->constructor().IsFactory()) {
|
|
EffectGraphVisitor::VisitConstructorCallNode(node);
|
|
return;
|
|
}
|
|
|
|
// t_n contains the allocated and initialized object.
|
|
// t_n <- AllocateObject(class)
|
|
// t_n <- StoreLocal(temp, t_n);
|
|
// t_n+1 <- ctor-arg
|
|
// t_n+2... <- constructor arguments start here
|
|
// StaticCall(constructor, t_n, t_n+1, ...)
|
|
// tn <- LoadLocal(temp)
|
|
|
|
Value* allocate = BuildObjectAllocation(node);
|
|
{ LocalVariable* tmp_var = EnterTempLocalScope(allocate);
|
|
Value* allocated_tmp = Bind(new(Z) LoadLocalInstr(*tmp_var));
|
|
PushArgumentInstr* push_allocated_value = PushArgument(allocated_tmp);
|
|
BuildConstructorCall(node, push_allocated_value);
|
|
ReturnDefinition(ExitTempLocalScope(tmp_var));
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitInstanceGetterNode(InstanceGetterNode* node) {
|
|
ValueGraphVisitor for_receiver(owner());
|
|
node->receiver()->Visit(&for_receiver);
|
|
Append(for_receiver);
|
|
PushArgumentInstr* push_receiver = PushArgument(for_receiver.value());
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(1);
|
|
arguments->Add(push_receiver);
|
|
const String& name =
|
|
String::ZoneHandle(Z, Field::GetterSymbol(node->field_name()));
|
|
InstanceCallInstr* call = new(Z) InstanceCallInstr(
|
|
node->token_pos(),
|
|
name,
|
|
Token::kGET,
|
|
arguments, Object::null_array(),
|
|
1,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(call);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildInstanceSetterArguments(
|
|
InstanceSetterNode* node,
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments,
|
|
bool result_is_needed) {
|
|
ValueGraphVisitor for_receiver(owner());
|
|
node->receiver()->Visit(&for_receiver);
|
|
Append(for_receiver);
|
|
arguments->Add(PushArgument(for_receiver.value()));
|
|
|
|
ValueGraphVisitor for_value(owner());
|
|
node->value()->Visit(&for_value);
|
|
Append(for_value);
|
|
|
|
Value* value = NULL;
|
|
if (result_is_needed) {
|
|
value = Bind(BuildStoreExprTemp(for_value.value()));
|
|
} else {
|
|
value = for_value.value();
|
|
}
|
|
arguments->Add(PushArgument(value));
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitInstanceSetterNode(InstanceSetterNode* node) {
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(2);
|
|
BuildInstanceSetterArguments(node, arguments, kResultNotNeeded);
|
|
const String& name =
|
|
String::ZoneHandle(Z, Field::SetterSymbol(node->field_name()));
|
|
InstanceCallInstr* call = new(Z) InstanceCallInstr(node->token_pos(),
|
|
name,
|
|
Token::kSET,
|
|
arguments,
|
|
Object::null_array(),
|
|
2, // Checked arg count.
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(call);
|
|
}
|
|
|
|
|
|
void ValueGraphVisitor::VisitInstanceSetterNode(InstanceSetterNode* node) {
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(2);
|
|
BuildInstanceSetterArguments(node, arguments, kResultNeeded);
|
|
const String& name =
|
|
String::ZoneHandle(Z, Field::SetterSymbol(node->field_name()));
|
|
Do(new(Z) InstanceCallInstr(node->token_pos(),
|
|
name,
|
|
Token::kSET,
|
|
arguments,
|
|
Object::null_array(),
|
|
2, // Checked argument count.
|
|
owner()->ic_data_array()));
|
|
ReturnDefinition(BuildLoadExprTemp());
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitStaticGetterNode(StaticGetterNode* node) {
|
|
const String& getter_name =
|
|
String::ZoneHandle(Z, Field::GetterSymbol(node->field_name()));
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>();
|
|
Function& getter_function = Function::ZoneHandle(Z, Function::null());
|
|
if (node->is_super_getter()) {
|
|
// Statically resolved instance getter, i.e. "super getter".
|
|
ASSERT(node->receiver() != NULL);
|
|
getter_function = Resolver::ResolveDynamicAnyArgs(node->cls(), getter_name);
|
|
if (getter_function.IsNull()) {
|
|
// Resolve and call noSuchMethod.
|
|
ArgumentListNode* arguments = new(Z) ArgumentListNode(node->token_pos());
|
|
arguments->Add(node->receiver());
|
|
StaticCallInstr* call =
|
|
BuildStaticNoSuchMethodCall(node->cls(),
|
|
node->receiver(),
|
|
getter_name,
|
|
arguments,
|
|
false, // Don't save last argument.
|
|
true); // Super invocation.
|
|
ReturnDefinition(call);
|
|
return;
|
|
} else {
|
|
ValueGraphVisitor receiver_value(owner());
|
|
node->receiver()->Visit(&receiver_value);
|
|
Append(receiver_value);
|
|
arguments->Add(PushArgument(receiver_value.value()));
|
|
}
|
|
} else {
|
|
getter_function = node->cls().LookupStaticFunction(getter_name);
|
|
if (getter_function.IsNull()) {
|
|
// When the parser encounters a reference to a static field materialized
|
|
// only by a static setter, but no corresponding static getter, it creates
|
|
// a StaticGetterNode ast node referring to the non-existing static getter
|
|
// for the case this field reference appears in a left hand side
|
|
// expression (the parser has not distinguished between left and right
|
|
// hand side yet at this stage). If the parser establishes later that the
|
|
// field access is part of a left hand side expression, the
|
|
// StaticGetterNode is transformed into a StaticSetterNode referring to
|
|
// the existing static setter.
|
|
// However, if the field reference appears in a right hand side
|
|
// expression, no such transformation occurs and we land here with a
|
|
// StaticGetterNode missing a getter function, so we throw a
|
|
// NoSuchMethodError.
|
|
|
|
// Throw a NoSuchMethodError.
|
|
StaticCallInstr* call = BuildThrowNoSuchMethodError(
|
|
node->token_pos(),
|
|
node->cls(),
|
|
getter_name,
|
|
NULL, // No Arguments to getter.
|
|
InvocationMirror::EncodeType(
|
|
node->cls().IsTopLevel() ?
|
|
InvocationMirror::kTopLevel :
|
|
InvocationMirror::kStatic,
|
|
InvocationMirror::kGetter));
|
|
ReturnDefinition(call);
|
|
return;
|
|
}
|
|
}
|
|
ASSERT(!getter_function.IsNull());
|
|
StaticCallInstr* call = new(Z) StaticCallInstr(
|
|
node->token_pos(),
|
|
getter_function,
|
|
Object::null_array(), // No names
|
|
arguments,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(call);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildStaticSetter(StaticSetterNode* node,
|
|
bool result_is_needed) {
|
|
const String& setter_name =
|
|
String::ZoneHandle(Z, Field::SetterSymbol(node->field_name()));
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(1);
|
|
// A super setter is an instance setter whose setter function is
|
|
// resolved at compile time (in the caller instance getter's super class).
|
|
// Unlike a static getter, a super getter has a receiver parameter.
|
|
const bool is_super_setter = (node->receiver() != NULL);
|
|
const Function& setter_function = node->function();
|
|
StaticCallInstr* call;
|
|
if (setter_function.IsNull()) {
|
|
if (is_super_setter) {
|
|
ASSERT(node->receiver() != NULL);
|
|
// Resolve and call noSuchMethod.
|
|
ArgumentListNode* arguments = new(Z) ArgumentListNode(node->token_pos());
|
|
arguments->Add(node->receiver());
|
|
arguments->Add(node->value());
|
|
call = BuildStaticNoSuchMethodCall(
|
|
node->cls(),
|
|
node->receiver(),
|
|
setter_name,
|
|
arguments,
|
|
result_is_needed, // Save last arg if result is needed.
|
|
true); // Super invocation.
|
|
} else {
|
|
// Throw a NoSuchMethodError.
|
|
ArgumentListNode* arguments = new(Z) ArgumentListNode(node->token_pos());
|
|
arguments->Add(node->value());
|
|
call = BuildThrowNoSuchMethodError(
|
|
node->token_pos(),
|
|
node->cls(),
|
|
setter_name,
|
|
arguments, // Argument is the value passed to the setter.
|
|
InvocationMirror::EncodeType(
|
|
node->cls().IsTopLevel() ?
|
|
InvocationMirror::kTopLevel :
|
|
InvocationMirror::kStatic,
|
|
InvocationMirror::kSetter));
|
|
}
|
|
} else {
|
|
if (is_super_setter) {
|
|
// Add receiver of instance getter.
|
|
ValueGraphVisitor for_receiver(owner());
|
|
node->receiver()->Visit(&for_receiver);
|
|
Append(for_receiver);
|
|
arguments->Add(PushArgument(for_receiver.value()));
|
|
}
|
|
ValueGraphVisitor for_value(owner());
|
|
node->value()->Visit(&for_value);
|
|
Append(for_value);
|
|
Value* value = NULL;
|
|
if (result_is_needed) {
|
|
value = Bind(BuildStoreExprTemp(for_value.value()));
|
|
} else {
|
|
value = for_value.value();
|
|
}
|
|
arguments->Add(PushArgument(value));
|
|
|
|
call = new(Z) StaticCallInstr(node->token_pos(),
|
|
setter_function,
|
|
Object::null_array(), // No names.
|
|
arguments,
|
|
owner()->ic_data_array());
|
|
}
|
|
if (result_is_needed) {
|
|
Do(call);
|
|
ReturnDefinition(BuildLoadExprTemp());
|
|
} else {
|
|
ReturnDefinition(call);
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitStaticSetterNode(StaticSetterNode* node) {
|
|
BuildStaticSetter(node, false); // Result not needed.
|
|
}
|
|
|
|
|
|
void ValueGraphVisitor::VisitStaticSetterNode(StaticSetterNode* node) {
|
|
BuildStaticSetter(node, true); // Result needed.
|
|
}
|
|
|
|
|
|
static intptr_t OffsetForLengthGetter(MethodRecognizer::Kind kind) {
|
|
switch (kind) {
|
|
case MethodRecognizer::kObjectArrayLength:
|
|
case MethodRecognizer::kImmutableArrayLength:
|
|
return Array::length_offset();
|
|
case MethodRecognizer::kTypedDataLength:
|
|
// .length is defined in _TypedList which is the base class for internal
|
|
// and external typed data.
|
|
ASSERT(TypedData::length_offset() == ExternalTypedData::length_offset());
|
|
return TypedData::length_offset();
|
|
case MethodRecognizer::kGrowableArrayLength:
|
|
return GrowableObjectArray::length_offset();
|
|
default:
|
|
UNREACHABLE();
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
LoadLocalInstr* EffectGraphVisitor::BuildLoadThisVar(LocalScope* scope) {
|
|
LocalVariable* receiver_var = scope->LookupVariable(Symbols::This(),
|
|
true); // Test only.
|
|
return new(Z) LoadLocalInstr(*receiver_var);
|
|
}
|
|
|
|
|
|
LoadFieldInstr* EffectGraphVisitor::BuildNativeGetter(
|
|
NativeBodyNode* node,
|
|
MethodRecognizer::Kind kind,
|
|
intptr_t offset,
|
|
const Type& type,
|
|
intptr_t class_id) {
|
|
Value* receiver = Bind(BuildLoadThisVar(node->scope()));
|
|
LoadFieldInstr* load = new(Z) LoadFieldInstr(receiver,
|
|
offset,
|
|
type,
|
|
node->token_pos());
|
|
load->set_result_cid(class_id);
|
|
load->set_recognized_kind(kind);
|
|
return load;
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitNativeBodyNode(NativeBodyNode* node) {
|
|
const Function& function = owner()->function();
|
|
if (!function.IsClosureFunction()) {
|
|
MethodRecognizer::Kind kind = MethodRecognizer::RecognizeKind(function);
|
|
switch (kind) {
|
|
case MethodRecognizer::kObjectEquals: {
|
|
Value* receiver = Bind(BuildLoadThisVar(node->scope()));
|
|
LocalVariable* other_var =
|
|
node->scope()->LookupVariable(Symbols::Other(),
|
|
true); // Test only.
|
|
Value* other = Bind(new(Z) LoadLocalInstr(*other_var));
|
|
// Receiver is not a number because numbers override equality.
|
|
const bool kNoNumberCheck = false;
|
|
StrictCompareInstr* compare =
|
|
new(Z) StrictCompareInstr(node->token_pos(),
|
|
Token::kEQ_STRICT,
|
|
receiver,
|
|
other,
|
|
kNoNumberCheck);
|
|
return ReturnDefinition(compare);
|
|
}
|
|
case MethodRecognizer::kStringBaseLength:
|
|
case MethodRecognizer::kStringBaseIsEmpty: {
|
|
// Treat length loads as mutable (i.e. affected by side effects) to
|
|
// avoid hoisting them since we can't hoist the preceding class-check.
|
|
// This is because of externalization of strings that affects their
|
|
// class-id.
|
|
LoadFieldInstr* load = BuildNativeGetter(
|
|
node, MethodRecognizer::kStringBaseLength, String::length_offset(),
|
|
Type::ZoneHandle(Z, Type::SmiType()), kSmiCid);
|
|
if (kind == MethodRecognizer::kStringBaseLength) {
|
|
return ReturnDefinition(load);
|
|
}
|
|
ASSERT(kind == MethodRecognizer::kStringBaseIsEmpty);
|
|
Value* zero_val = Bind(new(Z) ConstantInstr(
|
|
Smi::ZoneHandle(Z, Smi::New(0))));
|
|
Value* load_val = Bind(load);
|
|
StrictCompareInstr* compare =
|
|
new(Z) StrictCompareInstr(node->token_pos(),
|
|
Token::kEQ_STRICT,
|
|
load_val,
|
|
zero_val,
|
|
false); // No number check.
|
|
return ReturnDefinition(compare);
|
|
}
|
|
case MethodRecognizer::kGrowableArrayLength:
|
|
case MethodRecognizer::kObjectArrayLength:
|
|
case MethodRecognizer::kImmutableArrayLength:
|
|
case MethodRecognizer::kTypedDataLength: {
|
|
LoadFieldInstr* load = BuildNativeGetter(
|
|
node, kind, OffsetForLengthGetter(kind),
|
|
Type::ZoneHandle(Z, Type::SmiType()), kSmiCid);
|
|
load->set_is_immutable(kind != MethodRecognizer::kGrowableArrayLength);
|
|
return ReturnDefinition(load);
|
|
}
|
|
case MethodRecognizer::kClassIDgetID: {
|
|
LocalVariable* value_var =
|
|
node->scope()->LookupVariable(Symbols::Value(), true);
|
|
Value* value = Bind(new(Z) LoadLocalInstr(*value_var));
|
|
LoadClassIdInstr* load = new(Z) LoadClassIdInstr(value);
|
|
return ReturnDefinition(load);
|
|
}
|
|
case MethodRecognizer::kGrowableArrayCapacity: {
|
|
Value* receiver = Bind(BuildLoadThisVar(node->scope()));
|
|
LoadFieldInstr* data_load = new(Z) LoadFieldInstr(
|
|
receiver,
|
|
Array::data_offset(),
|
|
Type::ZoneHandle(Z, Type::DynamicType()),
|
|
node->token_pos());
|
|
data_load->set_result_cid(kArrayCid);
|
|
Value* data = Bind(data_load);
|
|
LoadFieldInstr* length_load = new(Z) LoadFieldInstr(
|
|
data,
|
|
Array::length_offset(),
|
|
Type::ZoneHandle(Z, Type::SmiType()),
|
|
node->token_pos());
|
|
length_load->set_result_cid(kSmiCid);
|
|
length_load->set_recognized_kind(MethodRecognizer::kObjectArrayLength);
|
|
return ReturnDefinition(length_load);
|
|
}
|
|
case MethodRecognizer::kObjectArrayAllocate: {
|
|
LocalVariable* type_args_parameter =
|
|
node->scope()->LookupVariable(Symbols::TypeArgumentsParameter(),
|
|
true);
|
|
Value* element_type = Bind(new(Z) LoadLocalInstr(*type_args_parameter));
|
|
LocalVariable* length_parameter =
|
|
node->scope()->LookupVariable(Symbols::Length(), true);
|
|
Value* length = Bind(new(Z) LoadLocalInstr(*length_parameter));
|
|
CreateArrayInstr* create_array =
|
|
new CreateArrayInstr(node->token_pos(), element_type, length);
|
|
return ReturnDefinition(create_array);
|
|
}
|
|
case MethodRecognizer::kBigint_getDigits: {
|
|
return ReturnDefinition(BuildNativeGetter(
|
|
node, kind, Bigint::digits_offset(),
|
|
Type::ZoneHandle(Z, Type::DynamicType()),
|
|
kTypedDataUint32ArrayCid));
|
|
}
|
|
case MethodRecognizer::kBigint_getUsed: {
|
|
return ReturnDefinition(BuildNativeGetter(
|
|
node, kind, Bigint::used_offset(),
|
|
Type::ZoneHandle(Z, Type::SmiType()), kSmiCid));
|
|
}
|
|
case MethodRecognizer::kBigint_getNeg: {
|
|
return ReturnDefinition(BuildNativeGetter(
|
|
node, kind, Bigint::neg_offset(),
|
|
Type::ZoneHandle(Z, Type::BoolType()), kBoolCid));
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
InlineBailout("EffectGraphVisitor::VisitNativeBodyNode");
|
|
NativeCallInstr* native_call = new(Z) NativeCallInstr(node);
|
|
ReturnDefinition(native_call);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitPrimaryNode(PrimaryNode* node) {
|
|
// PrimaryNodes are temporary during parsing.
|
|
UNREACHABLE();
|
|
}
|
|
|
|
|
|
// <Expression> ::= LoadLocal { local: LocalVariable }
|
|
void EffectGraphVisitor::VisitLoadLocalNode(LoadLocalNode* node) {
|
|
// Nothing to do.
|
|
}
|
|
|
|
|
|
void ValueGraphVisitor::VisitLoadLocalNode(LoadLocalNode* node) {
|
|
Definition* load = BuildLoadLocal(node->local());
|
|
ReturnDefinition(load);
|
|
}
|
|
|
|
|
|
// <Expression> ::= StoreLocal { local: LocalVariable
|
|
// value: <Expression> }
|
|
void EffectGraphVisitor::VisitStoreLocalNode(StoreLocalNode* node) {
|
|
// If the right hand side is an expression that does not contain
|
|
// a safe point for the debugger to stop, add an explicit stub
|
|
// call. Exception: don't do this when assigning to or from internal
|
|
// variables, or for generated code that has no source position.
|
|
if (FLAG_support_debugger) {
|
|
if ((node->value()->IsLiteralNode() ||
|
|
(node->value()->IsLoadLocalNode() &&
|
|
!node->value()->AsLoadLocalNode()->local().IsInternal()) ||
|
|
node->value()->IsClosureNode()) &&
|
|
!node->local().IsInternal() &&
|
|
(node->token_pos() != Scanner::kNoSourcePos)) {
|
|
AddInstruction(new(Z) DebugStepCheckInstr(
|
|
node->token_pos(), RawPcDescriptors::kRuntimeCall));
|
|
}
|
|
}
|
|
|
|
ValueGraphVisitor for_value(owner());
|
|
node->value()->Visit(&for_value);
|
|
Append(for_value);
|
|
Value* store_value = for_value.value();
|
|
if (Isolate::Current()->TypeChecksEnabled()) {
|
|
store_value = BuildAssignableValue(node->value()->token_pos(),
|
|
store_value,
|
|
node->local().type(),
|
|
node->local().name());
|
|
}
|
|
Definition* store = BuildStoreLocal(node->local(), store_value);
|
|
ReturnDefinition(store);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitLoadInstanceFieldNode(
|
|
LoadInstanceFieldNode* node) {
|
|
ValueGraphVisitor for_instance(owner());
|
|
node->instance()->Visit(&for_instance);
|
|
Append(for_instance);
|
|
LoadFieldInstr* load = new(Z) LoadFieldInstr(
|
|
for_instance.value(),
|
|
&node->field(),
|
|
AbstractType::ZoneHandle(Z, node->field().type()),
|
|
node->token_pos());
|
|
if (node->field().guarded_cid() != kIllegalCid) {
|
|
if (!node->field().is_nullable() ||
|
|
(node->field().guarded_cid() == kNullCid)) {
|
|
load->set_result_cid(node->field().guarded_cid());
|
|
}
|
|
FlowGraph::AddToGuardedFields(owner()->guarded_fields(), &node->field());
|
|
}
|
|
ReturnDefinition(load);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitStoreInstanceFieldNode(
|
|
StoreInstanceFieldNode* node) {
|
|
ValueGraphVisitor for_instance(owner());
|
|
node->instance()->Visit(&for_instance);
|
|
Append(for_instance);
|
|
ValueGraphVisitor for_value(owner());
|
|
node->value()->Visit(&for_value);
|
|
Append(for_value);
|
|
Value* store_value = for_value.value();
|
|
if (Isolate::Current()->TypeChecksEnabled()) {
|
|
const AbstractType& type =
|
|
AbstractType::ZoneHandle(Z, node->field().type());
|
|
const String& dst_name = String::ZoneHandle(Z, node->field().name());
|
|
store_value = BuildAssignableValue(node->value()->token_pos(),
|
|
store_value,
|
|
type,
|
|
dst_name);
|
|
}
|
|
|
|
if (FLAG_use_field_guards) {
|
|
store_value = Bind(BuildStoreExprTemp(store_value));
|
|
GuardFieldClassInstr* guard_field_class =
|
|
new(Z) GuardFieldClassInstr(store_value,
|
|
node->field(),
|
|
isolate()->GetNextDeoptId());
|
|
AddInstruction(guard_field_class);
|
|
store_value = Bind(BuildLoadExprTemp());
|
|
GuardFieldLengthInstr* guard_field_length =
|
|
new(Z) GuardFieldLengthInstr(store_value,
|
|
node->field(),
|
|
isolate()->GetNextDeoptId());
|
|
AddInstruction(guard_field_length);
|
|
store_value = Bind(BuildLoadExprTemp());
|
|
}
|
|
StoreInstanceFieldInstr* store =
|
|
new(Z) StoreInstanceFieldInstr(node->field(),
|
|
for_instance.value(),
|
|
store_value,
|
|
kEmitStoreBarrier,
|
|
node->token_pos());
|
|
// Maybe initializing unboxed store.
|
|
store->set_is_potential_unboxed_initialization(true);
|
|
ReturnDefinition(store);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitLoadStaticFieldNode(LoadStaticFieldNode* node) {
|
|
if (node->field().is_const()) {
|
|
ASSERT(node->field().value() != Object::sentinel().raw());
|
|
ASSERT(node->field().value() != Object::transition_sentinel().raw());
|
|
Definition* result =
|
|
new(Z) ConstantInstr(Instance::ZoneHandle(Z, node->field().value()));
|
|
return ReturnDefinition(result);
|
|
}
|
|
Value* field_value = Bind(new(Z) ConstantInstr(node->field()));
|
|
LoadStaticFieldInstr* load = new(Z) LoadStaticFieldInstr(field_value);
|
|
ReturnDefinition(load);
|
|
}
|
|
|
|
|
|
Definition* EffectGraphVisitor::BuildStoreStaticField(
|
|
StoreStaticFieldNode* node, bool result_is_needed) {
|
|
ValueGraphVisitor for_value(owner());
|
|
node->value()->Visit(&for_value);
|
|
Append(for_value);
|
|
Value* store_value = NULL;
|
|
if (result_is_needed) {
|
|
store_value = Bind(BuildStoreExprTemp(for_value.value()));
|
|
} else {
|
|
store_value = for_value.value();
|
|
}
|
|
StoreStaticFieldInstr* store =
|
|
new(Z) StoreStaticFieldInstr(node->field(), store_value);
|
|
|
|
if (result_is_needed) {
|
|
Do(store);
|
|
return BuildLoadExprTemp();
|
|
} else {
|
|
return store;
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitStoreStaticFieldNode(StoreStaticFieldNode* node) {
|
|
ReturnDefinition(BuildStoreStaticField(node, kResultNotNeeded));
|
|
}
|
|
|
|
|
|
void ValueGraphVisitor::VisitStoreStaticFieldNode(StoreStaticFieldNode* node) {
|
|
ReturnDefinition(BuildStoreStaticField(node, kResultNeeded));
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitLoadIndexedNode(LoadIndexedNode* node) {
|
|
Function* super_function = NULL;
|
|
if (node->IsSuperLoad()) {
|
|
// Resolve the load indexed operator in the super class.
|
|
super_function = &Function::ZoneHandle(
|
|
Z, Resolver::ResolveDynamicAnyArgs(node->super_class(),
|
|
Symbols::IndexToken()));
|
|
if (super_function->IsNull()) {
|
|
// Could not resolve super operator. Generate call noSuchMethod() of the
|
|
// super class instead.
|
|
ArgumentListNode* arguments = new(Z) ArgumentListNode(node->token_pos());
|
|
arguments->Add(node->array());
|
|
arguments->Add(node->index_expr());
|
|
StaticCallInstr* call =
|
|
BuildStaticNoSuchMethodCall(node->super_class(),
|
|
node->array(),
|
|
Symbols::IndexToken(),
|
|
arguments,
|
|
false, // Don't save last arg.
|
|
true); // Super invocation.
|
|
ReturnDefinition(call);
|
|
return;
|
|
}
|
|
}
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(2);
|
|
ValueGraphVisitor for_array(owner());
|
|
node->array()->Visit(&for_array);
|
|
Append(for_array);
|
|
arguments->Add(PushArgument(for_array.value()));
|
|
|
|
ValueGraphVisitor for_index(owner());
|
|
node->index_expr()->Visit(&for_index);
|
|
Append(for_index);
|
|
arguments->Add(PushArgument(for_index.value()));
|
|
|
|
if (super_function != NULL) {
|
|
// Generate static call to super operator.
|
|
StaticCallInstr* load = new(Z) StaticCallInstr(node->token_pos(),
|
|
*super_function,
|
|
Object::null_array(),
|
|
arguments,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(load);
|
|
} else {
|
|
// Generate dynamic call to index operator.
|
|
const intptr_t checked_argument_count = 1;
|
|
InstanceCallInstr* load = new(Z) InstanceCallInstr(
|
|
node->token_pos(),
|
|
Symbols::IndexToken(),
|
|
Token::kINDEX,
|
|
arguments,
|
|
Object::null_array(),
|
|
checked_argument_count,
|
|
owner()->ic_data_array());
|
|
ReturnDefinition(load);
|
|
}
|
|
}
|
|
|
|
|
|
Definition* EffectGraphVisitor::BuildStoreIndexedValues(
|
|
StoreIndexedNode* node,
|
|
bool result_is_needed) {
|
|
Function* super_function = NULL;
|
|
if (node->IsSuperStore()) {
|
|
// Resolve the store indexed operator in the super class.
|
|
super_function = &Function::ZoneHandle(
|
|
Z, Resolver::ResolveDynamicAnyArgs(node->super_class(),
|
|
Symbols::AssignIndexToken()));
|
|
if (super_function->IsNull()) {
|
|
// Could not resolve super operator. Generate call noSuchMethod() of the
|
|
// super class instead.
|
|
ArgumentListNode* arguments = new(Z) ArgumentListNode(node->token_pos());
|
|
arguments->Add(node->array());
|
|
arguments->Add(node->index_expr());
|
|
arguments->Add(node->value());
|
|
StaticCallInstr* call = BuildStaticNoSuchMethodCall(
|
|
node->super_class(),
|
|
node->array(),
|
|
Symbols::AssignIndexToken(),
|
|
arguments,
|
|
result_is_needed, // Save last arg if result is needed.
|
|
true); // Super invocation.
|
|
if (result_is_needed) {
|
|
Do(call);
|
|
// BuildStaticNoSuchMethodCall stores the value in expression_temp.
|
|
return BuildLoadExprTemp();
|
|
} else {
|
|
return call;
|
|
}
|
|
}
|
|
}
|
|
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(3);
|
|
ValueGraphVisitor for_array(owner());
|
|
node->array()->Visit(&for_array);
|
|
Append(for_array);
|
|
arguments->Add(PushArgument(for_array.value()));
|
|
|
|
ValueGraphVisitor for_index(owner());
|
|
node->index_expr()->Visit(&for_index);
|
|
Append(for_index);
|
|
arguments->Add(PushArgument(for_index.value()));
|
|
|
|
ValueGraphVisitor for_value(owner());
|
|
node->value()->Visit(&for_value);
|
|
Append(for_value);
|
|
Value* value = NULL;
|
|
if (result_is_needed) {
|
|
value = Bind(BuildStoreExprTemp(for_value.value()));
|
|
} else {
|
|
value = for_value.value();
|
|
}
|
|
arguments->Add(PushArgument(value));
|
|
|
|
if (super_function != NULL) {
|
|
// Generate static call to super operator []=.
|
|
|
|
StaticCallInstr* store =
|
|
new(Z) StaticCallInstr(node->token_pos(),
|
|
*super_function,
|
|
Object::null_array(),
|
|
arguments,
|
|
owner()->ic_data_array());
|
|
if (result_is_needed) {
|
|
Do(store);
|
|
return BuildLoadExprTemp();
|
|
} else {
|
|
return store;
|
|
}
|
|
} else {
|
|
// Generate dynamic call to operator []=.
|
|
const intptr_t checked_argument_count = 3;
|
|
const String& name =
|
|
String::ZoneHandle(Z, Symbols::New(Token::Str(Token::kASSIGN_INDEX)));
|
|
InstanceCallInstr* store =
|
|
new(Z) InstanceCallInstr(node->token_pos(),
|
|
name,
|
|
Token::kASSIGN_INDEX,
|
|
arguments,
|
|
Object::null_array(),
|
|
checked_argument_count,
|
|
owner()->ic_data_array());
|
|
if (result_is_needed) {
|
|
Do(store);
|
|
return BuildLoadExprTemp();
|
|
} else {
|
|
return store;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitStoreIndexedNode(StoreIndexedNode* node) {
|
|
ReturnDefinition(BuildStoreIndexedValues(node, kResultNotNeeded));
|
|
}
|
|
|
|
|
|
void ValueGraphVisitor::VisitStoreIndexedNode(StoreIndexedNode* node) {
|
|
ReturnDefinition(BuildStoreIndexedValues(node, kResultNeeded));
|
|
}
|
|
|
|
|
|
bool EffectGraphVisitor::HasContextScope() const {
|
|
const ContextScope& context_scope = ContextScope::Handle(
|
|
owner()->function().context_scope());
|
|
return !context_scope.IsNull() && (context_scope.num_variables() > 0);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::UnchainContexts(intptr_t n) {
|
|
if (n > 0) {
|
|
Value* context = Bind(BuildCurrentContext());
|
|
while (n-- > 0) {
|
|
context = Bind(
|
|
new(Z) LoadFieldInstr(context,
|
|
Context::parent_offset(),
|
|
// Not an instance, no type.
|
|
Type::ZoneHandle(Z, Type::null()),
|
|
Scanner::kNoSourcePos));
|
|
}
|
|
Do(BuildStoreContext(context));
|
|
}
|
|
}
|
|
|
|
|
|
// <Statement> ::= Sequence { scope: LocalScope
|
|
// nodes: <Statement>*
|
|
// label: SourceLabel }
|
|
void EffectGraphVisitor::VisitSequenceNode(SequenceNode* node) {
|
|
LocalScope* scope = node->scope();
|
|
const Function& function = owner()->function();
|
|
const intptr_t num_context_variables =
|
|
(scope != NULL) ? scope->num_context_variables() : 0;
|
|
const bool is_top_level_sequence =
|
|
node == owner()->parsed_function().node_sequence();
|
|
// The outermost function sequence cannot contain a label.
|
|
ASSERT((node->label() == NULL) || !is_top_level_sequence);
|
|
NestedBlock nested_block(owner(), node);
|
|
|
|
if (num_context_variables > 0) {
|
|
// The local scope declares variables that are captured.
|
|
// Allocate and chain a new context (Except don't chain when at the function
|
|
// entry if the function does not capture any variables from outer scopes).
|
|
Value* allocated_context =
|
|
Bind(new(Z) AllocateContextInstr(node->token_pos(),
|
|
num_context_variables));
|
|
{ LocalVariable* tmp_var = EnterTempLocalScope(allocated_context);
|
|
if (!is_top_level_sequence || HasContextScope()) {
|
|
ASSERT(is_top_level_sequence ||
|
|
(nested_block.ContextLevel() ==
|
|
nested_block.outer()->ContextLevel() + 1));
|
|
Value* tmp_val = Bind(new(Z) LoadLocalInstr(*tmp_var));
|
|
Value* parent_context = Bind(BuildCurrentContext());
|
|
Do(new(Z) StoreInstanceFieldInstr(Context::parent_offset(),
|
|
tmp_val,
|
|
parent_context,
|
|
kEmitStoreBarrier,
|
|
Scanner::kNoSourcePos));
|
|
}
|
|
Do(BuildStoreContext(Bind(ExitTempLocalScope(tmp_var))));
|
|
}
|
|
|
|
// If this node_sequence is the body of the function being compiled, copy
|
|
// the captured parameters from the frame into the context.
|
|
if (is_top_level_sequence) {
|
|
ASSERT(scope->context_level() == 1);
|
|
const int num_params = function.NumParameters();
|
|
int param_frame_index = (num_params == function.num_fixed_parameters()) ?
|
|
(kParamEndSlotFromFp + num_params) : kFirstLocalSlotFromFp;
|
|
for (int pos = 0; pos < num_params; param_frame_index--, pos++) {
|
|
const LocalVariable& parameter = *scope->VariableAt(pos);
|
|
ASSERT(parameter.owner() == scope);
|
|
if (parameter.is_captured()) {
|
|
// Create a temporary local describing the original position.
|
|
const String& temp_name = Symbols::TempParam();
|
|
LocalVariable* temp_local = new(Z) LocalVariable(
|
|
0, // Token index.
|
|
temp_name,
|
|
Type::ZoneHandle(Z, Type::DynamicType())); // Type.
|
|
temp_local->set_index(param_frame_index);
|
|
|
|
// Mark this local as captured parameter so that the optimizer
|
|
// correctly handles these when compiling try-catch: Captured
|
|
// parameters are not in the stack environment, therefore they
|
|
// must be skipped when emitting sync-code in try-blocks.
|
|
temp_local->set_is_captured_parameter(true);
|
|
|
|
// Copy parameter from local frame to current context.
|
|
Value* load = Bind(BuildLoadLocal(*temp_local));
|
|
Do(BuildStoreLocal(parameter, load));
|
|
// Write NULL to the source location to detect buggy accesses and
|
|
// allow GC of passed value if it gets overwritten by a new value in
|
|
// the function.
|
|
Value* null_constant = Bind(new(Z) ConstantInstr(
|
|
Object::ZoneHandle(Z, Object::null())));
|
|
Do(BuildStoreLocal(*temp_local, null_constant));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// This check may be deleted if the generated code is leaf.
|
|
// Native functions don't need a stack check at entry.
|
|
if (is_top_level_sequence && !function.is_native()) {
|
|
// Always allocate CheckOverflowInstr so that deopt-ids match regardless
|
|
// if we inline or not.
|
|
if (!function.IsImplicitGetterFunction() &&
|
|
!function.IsImplicitSetterFunction()) {
|
|
CheckStackOverflowInstr* check =
|
|
new(Z) CheckStackOverflowInstr(function.token_pos(), 0);
|
|
// If we are inlining don't actually attach the stack check. We must still
|
|
// create the stack check in order to allocate a deopt id.
|
|
if (!owner()->IsInlining()) {
|
|
AddInstruction(check);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Isolate::Current()->TypeChecksEnabled() && is_top_level_sequence) {
|
|
const int num_params = function.NumParameters();
|
|
int pos = 0;
|
|
if (function.IsGenerativeConstructor()) {
|
|
// Skip type checking of receiver and phase for constructor functions.
|
|
pos = 2;
|
|
} else if (function.IsFactory() || function.IsDynamicFunction()) {
|
|
// Skip type checking of type arguments for factory functions.
|
|
// Skip type checking of receiver for instance functions.
|
|
pos = 1;
|
|
}
|
|
while (pos < num_params) {
|
|
const LocalVariable& parameter = *scope->VariableAt(pos);
|
|
ASSERT(parameter.owner() == scope);
|
|
if (!CanSkipTypeCheck(parameter.token_pos(),
|
|
NULL,
|
|
parameter.type(),
|
|
parameter.name())) {
|
|
Value* parameter_value = Bind(BuildLoadLocal(parameter));
|
|
Do(BuildAssertAssignable(parameter.token_pos(),
|
|
parameter_value,
|
|
parameter.type(),
|
|
parameter.name()));
|
|
}
|
|
pos++;
|
|
}
|
|
}
|
|
|
|
// Continuation part:
|
|
// If this node sequence is the body of a function with continuations,
|
|
// leave room for a preamble.
|
|
// The preamble is generated after visiting the body.
|
|
GotoInstr* preamble_start = NULL;
|
|
if (is_top_level_sequence &&
|
|
(function.IsAsyncClosure() ||
|
|
function.IsSyncGenClosure() ||
|
|
function.IsAsyncGenClosure())) {
|
|
JoinEntryInstr* preamble_end = new(Z) JoinEntryInstr(
|
|
owner()->AllocateBlockId(), owner()->try_index());
|
|
ASSERT(exit() != NULL);
|
|
exit()->Goto(preamble_end);
|
|
ASSERT(exit()->next()->IsGoto());
|
|
preamble_start = exit()->next()->AsGoto();
|
|
ASSERT(preamble_start->IsGoto());
|
|
exit_ = preamble_end;
|
|
}
|
|
|
|
intptr_t i = 0;
|
|
while (is_open() && (i < node->length())) {
|
|
EffectGraphVisitor for_effect(owner());
|
|
node->NodeAt(i++)->Visit(&for_effect);
|
|
Append(for_effect);
|
|
if (!is_open()) {
|
|
// E.g., because of a JumpNode.
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Continuation part:
|
|
// After generating the CFG for the body we can create the preamble
|
|
// because we know exactly how many continuation states we need.
|
|
if (is_top_level_sequence &&
|
|
(function.IsAsyncClosure() ||
|
|
function.IsSyncGenClosure() ||
|
|
function.IsAsyncGenClosure())) {
|
|
ASSERT(preamble_start != NULL);
|
|
// We are at the top level. Fetch the corresponding scope.
|
|
LocalScope* top_scope = node->scope();
|
|
LocalVariable* jump_var = top_scope->LookupVariable(
|
|
Symbols::AwaitJumpVar(), false);
|
|
ASSERT(jump_var != NULL && jump_var->is_captured());
|
|
Instruction* saved_entry = entry_;
|
|
Instruction* saved_exit = exit_;
|
|
entry_ = NULL;
|
|
exit_ = NULL;
|
|
|
|
LoadLocalNode* load_jump_count =
|
|
new(Z) LoadLocalNode(Scanner::kNoSourcePos, jump_var);
|
|
ComparisonNode* check_jump_count;
|
|
const intptr_t num_await_states = owner()->await_joins()->length();
|
|
|
|
LocalVariable* old_context = top_scope->LookupVariable(
|
|
Symbols::AwaitContextVar(), false);
|
|
for (intptr_t i = 0; i < num_await_states; i++) {
|
|
check_jump_count = new(Z) ComparisonNode(
|
|
Scanner::kNoSourcePos,
|
|
Token::kEQ,
|
|
load_jump_count,
|
|
new(Z) LiteralNode(
|
|
Scanner::kNoSourcePos, Smi::ZoneHandle(Z, Smi::New(i))));
|
|
TestGraphVisitor for_test(owner(), Scanner::kNoSourcePos);
|
|
check_jump_count->Visit(&for_test);
|
|
EffectGraphVisitor for_true(owner());
|
|
EffectGraphVisitor for_false(owner());
|
|
|
|
if (function.IsAsyncClosure() || function.IsAsyncGenClosure()) {
|
|
LocalVariable* result_param =
|
|
top_scope->LookupVariable(Symbols::AsyncOperationParam(), false);
|
|
LocalVariable* error_param =
|
|
top_scope->LookupVariable(Symbols::AsyncOperationErrorParam(),
|
|
false);
|
|
LocalVariable* stack_trace_param =
|
|
top_scope->LookupVariable(Symbols::AsyncOperationStackTraceParam(),
|
|
false);
|
|
for_true.BuildAsyncJump(old_context,
|
|
result_param,
|
|
error_param,
|
|
stack_trace_param,
|
|
(*owner()->await_levels())[i],
|
|
(*owner()->await_joins())[i]);
|
|
} else {
|
|
ASSERT(function.IsSyncGenClosure());
|
|
LocalVariable* iterator_param =
|
|
top_scope->LookupVariable(Symbols::IteratorParameter(), false);
|
|
for_true.BuildSyncYieldJump(old_context,
|
|
iterator_param,
|
|
(*owner()->await_levels())[i],
|
|
(*owner()->await_joins())[i]);
|
|
}
|
|
|
|
Join(for_test, for_true, for_false);
|
|
if (i == 0) {
|
|
// Manually link up the preamble start.
|
|
preamble_start->previous()->set_next(for_test.entry());
|
|
for_test.entry()->set_previous(preamble_start->previous());
|
|
}
|
|
if (i == (num_await_states - 1)) {
|
|
// Link up preamble end.
|
|
if (exit_ == NULL) {
|
|
exit_ = preamble_start;
|
|
} else {
|
|
exit_->LinkTo(preamble_start);
|
|
}
|
|
}
|
|
}
|
|
entry_ = saved_entry;
|
|
exit_ = saved_exit;
|
|
}
|
|
|
|
if (is_open() &&
|
|
(num_context_variables > 0) &&
|
|
(!is_top_level_sequence || HasContextScope())) {
|
|
UnchainContexts(1);
|
|
}
|
|
|
|
// If this node sequence is labeled, a break out of the sequence will have
|
|
// taken care of unchaining the context.
|
|
if (nested_block.break_target() != NULL) {
|
|
if (is_open()) Goto(nested_block.break_target());
|
|
exit_ = nested_block.break_target();
|
|
}
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitCatchClauseNode(CatchClauseNode* node) {
|
|
InlineBailout("EffectGraphVisitor::VisitCatchClauseNode (exception)");
|
|
// Restores current context from local variable ':saved_try_context_var'.
|
|
BuildRestoreContext(node->context_var());
|
|
|
|
EffectGraphVisitor for_catch(owner());
|
|
node->VisitChildren(&for_catch);
|
|
Append(for_catch);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitTryCatchNode(TryCatchNode* node) {
|
|
InlineBailout("EffectGraphVisitor::VisitTryCatchNode (exception)");
|
|
intptr_t original_handler_index = owner()->try_index();
|
|
const intptr_t try_handler_index = node->try_index();
|
|
ASSERT(try_handler_index != original_handler_index);
|
|
owner()->set_try_index(try_handler_index);
|
|
|
|
// Preserve current context into local variable ':saved_try_context_var'.
|
|
BuildSaveContext(node->context_var());
|
|
|
|
EffectGraphVisitor for_try(owner());
|
|
node->try_block()->Visit(&for_try);
|
|
|
|
if (for_try.is_open()) {
|
|
JoinEntryInstr* after_try =
|
|
new(Z) JoinEntryInstr(owner()->AllocateBlockId(),
|
|
original_handler_index);
|
|
for_try.Goto(after_try);
|
|
for_try.exit_ = after_try;
|
|
}
|
|
|
|
JoinEntryInstr* try_entry =
|
|
new(Z) JoinEntryInstr(owner()->AllocateBlockId(), try_handler_index);
|
|
|
|
Goto(try_entry);
|
|
AppendFragment(try_entry, for_try);
|
|
exit_ = for_try.exit_;
|
|
|
|
// We are done generating code for the try block.
|
|
owner()->set_try_index(original_handler_index);
|
|
|
|
CatchClauseNode* catch_block = node->catch_block();
|
|
SequenceNode* finally_block = node->finally_block();
|
|
|
|
// If there is a finally block, it is the handler for code in the catch
|
|
// block.
|
|
const intptr_t catch_handler_index = (finally_block == NULL)
|
|
? original_handler_index
|
|
: catch_block->catch_handler_index();
|
|
|
|
const intptr_t prev_catch_try_index = owner()->catch_try_index();
|
|
|
|
owner()->set_try_index(catch_handler_index);
|
|
owner()->set_catch_try_index(try_handler_index);
|
|
EffectGraphVisitor for_catch(owner());
|
|
catch_block->Visit(&for_catch);
|
|
owner()->set_catch_try_index(prev_catch_try_index);
|
|
|
|
// NOTE: The implicit variables ':saved_try_context_var', ':exception_var'
|
|
// and ':stack_trace_var' can never be captured variables.
|
|
ASSERT(!catch_block->context_var().is_captured());
|
|
ASSERT(!catch_block->exception_var().is_captured());
|
|
ASSERT(!catch_block->stacktrace_var().is_captured());
|
|
|
|
CatchBlockEntryInstr* catch_entry =
|
|
new(Z) CatchBlockEntryInstr(owner()->AllocateBlockId(),
|
|
catch_handler_index,
|
|
catch_block->handler_types(),
|
|
try_handler_index,
|
|
catch_block->exception_var(),
|
|
catch_block->stacktrace_var(),
|
|
catch_block->needs_stacktrace());
|
|
owner()->AddCatchEntry(catch_entry);
|
|
AppendFragment(catch_entry, for_catch);
|
|
|
|
if (for_catch.is_open()) {
|
|
JoinEntryInstr* join = new(Z) JoinEntryInstr(owner()->AllocateBlockId(),
|
|
original_handler_index);
|
|
for_catch.Goto(join);
|
|
if (is_open()) Goto(join);
|
|
exit_ = join;
|
|
}
|
|
|
|
if (finally_block != NULL) {
|
|
// Create a handler for the code in the catch block, containing the
|
|
// code in the finally block.
|
|
owner()->set_try_index(original_handler_index);
|
|
EffectGraphVisitor for_finally(owner());
|
|
for_finally.BuildRestoreContext(catch_block->context_var());
|
|
|
|
finally_block->Visit(&for_finally);
|
|
if (for_finally.is_open()) {
|
|
// Rethrow the exception. Manually build the graph for rethrow.
|
|
Value* exception = for_finally.Bind(
|
|
for_finally.BuildLoadLocal(catch_block->rethrow_exception_var()));
|
|
for_finally.PushArgument(exception);
|
|
Value* stacktrace = for_finally.Bind(
|
|
for_finally.BuildLoadLocal(catch_block->rethrow_stacktrace_var()));
|
|
for_finally.PushArgument(stacktrace);
|
|
for_finally.AddInstruction(
|
|
new(Z) ReThrowInstr(catch_block->token_pos(), catch_handler_index));
|
|
for_finally.CloseFragment();
|
|
}
|
|
ASSERT(!for_finally.is_open());
|
|
|
|
const Array& types = Array::ZoneHandle(Z, Array::New(1, Heap::kOld));
|
|
types.SetAt(0, Type::Handle(Z, Type::DynamicType()));
|
|
CatchBlockEntryInstr* finally_entry =
|
|
new(Z) CatchBlockEntryInstr(owner()->AllocateBlockId(),
|
|
original_handler_index,
|
|
types,
|
|
catch_handler_index,
|
|
catch_block->exception_var(),
|
|
catch_block->stacktrace_var(),
|
|
catch_block->needs_stacktrace());
|
|
owner()->AddCatchEntry(finally_entry);
|
|
AppendFragment(finally_entry, for_finally);
|
|
}
|
|
|
|
// Generate code for the finally block if one exists.
|
|
if ((finally_block != NULL) && is_open()) {
|
|
EffectGraphVisitor for_finally_block(owner());
|
|
finally_block->Visit(&for_finally_block);
|
|
Append(for_finally_block);
|
|
}
|
|
}
|
|
|
|
|
|
// Looks up dynamic method noSuchMethod in target_class
|
|
// (including its super class chain) and builds a static call to it.
|
|
StaticCallInstr* EffectGraphVisitor::BuildStaticNoSuchMethodCall(
|
|
const Class& target_class,
|
|
AstNode* receiver,
|
|
const String& method_name,
|
|
ArgumentListNode* method_arguments,
|
|
bool save_last_arg,
|
|
bool is_super_invocation) {
|
|
intptr_t args_pos = method_arguments->token_pos();
|
|
LocalVariable* temp = NULL;
|
|
if (save_last_arg) {
|
|
temp = owner()->parsed_function().expression_temp_var();
|
|
}
|
|
ArgumentListNode* args =
|
|
Parser::BuildNoSuchMethodArguments(args_pos,
|
|
method_name,
|
|
*method_arguments,
|
|
temp,
|
|
is_super_invocation);
|
|
const Function& no_such_method_func = Function::ZoneHandle(Z,
|
|
Resolver::ResolveDynamicAnyArgs(target_class, Symbols::NoSuchMethod()));
|
|
// We are guaranteed to find noSuchMethod of class Object.
|
|
ASSERT(!no_such_method_func.IsNull());
|
|
ZoneGrowableArray<PushArgumentInstr*>* push_arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>(2);
|
|
BuildPushArguments(*args, push_arguments);
|
|
return new(Z) StaticCallInstr(args_pos,
|
|
no_such_method_func,
|
|
Object::null_array(),
|
|
push_arguments,
|
|
owner()->ic_data_array());
|
|
}
|
|
|
|
|
|
StaticCallInstr* EffectGraphVisitor::BuildThrowNoSuchMethodError(
|
|
intptr_t token_pos,
|
|
const Class& function_class,
|
|
const String& function_name,
|
|
ArgumentListNode* function_arguments,
|
|
int invocation_type) {
|
|
ZoneGrowableArray<PushArgumentInstr*>* arguments =
|
|
new(Z) ZoneGrowableArray<PushArgumentInstr*>();
|
|
// Object receiver, actually a class literal of the unresolved method's owner.
|
|
Type& type = Type::ZoneHandle(
|
|
Z,
|
|
Type::New(function_class,
|
|
TypeArguments::Handle(Z, TypeArguments::null()),
|
|
token_pos,
|
|
Heap::kOld));
|
|
type ^= ClassFinalizer::FinalizeType(
|
|
function_class, type, ClassFinalizer::kCanonicalize);
|
|
Value* receiver_value = Bind(new(Z) ConstantInstr(type));
|
|
arguments->Add(PushArgument(receiver_value));
|
|
// String memberName.
|
|
const String& member_name =
|
|
String::ZoneHandle(Z, Symbols::New(function_name));
|
|
Value* member_name_value = Bind(new(Z) ConstantInstr(member_name));
|
|
arguments->Add(PushArgument(member_name_value));
|
|
// Smi invocation_type.
|
|
Value* invocation_type_value = Bind(new(Z) ConstantInstr(
|
|
Smi::ZoneHandle(Z, Smi::New(invocation_type))));
|
|
arguments->Add(PushArgument(invocation_type_value));
|
|
// List arguments.
|
|
if (function_arguments == NULL) {
|
|
Value* arguments_value = Bind(
|
|
new(Z) ConstantInstr(Array::ZoneHandle(Z, Array::null())));
|
|
arguments->Add(PushArgument(arguments_value));
|
|
} else {
|
|
ValueGraphVisitor array_val(owner());
|
|
ArrayNode* array =
|
|
new(Z) ArrayNode(token_pos, Type::ZoneHandle(Z, Type::ArrayType()),
|
|
function_arguments->nodes());
|
|
array->Visit(&array_val);
|
|
Append(array_val);
|
|
arguments->Add(PushArgument(array_val.value()));
|
|
}
|
|
// List argumentNames.
|
|
ConstantInstr* cinstr = new(Z) ConstantInstr(
|
|
(function_arguments == NULL) ? Array::ZoneHandle(Z, Array::null())
|
|
: function_arguments->names());
|
|
Value* argument_names_value = Bind(cinstr);
|
|
arguments->Add(PushArgument(argument_names_value));
|
|
|
|
// List existingArgumentNames.
|
|
Value* existing_argument_names_value =
|
|
Bind(new(Z) ConstantInstr(Array::ZoneHandle(Z, Array::null())));
|
|
arguments->Add(PushArgument(existing_argument_names_value));
|
|
// Resolve and call NoSuchMethodError._throwNew.
|
|
const Library& core_lib = Library::Handle(Z, Library::CoreLibrary());
|
|
const Class& cls = Class::Handle(
|
|
Z, core_lib.LookupClass(Symbols::NoSuchMethodError()));
|
|
ASSERT(!cls.IsNull());
|
|
const Function& func = Function::ZoneHandle(
|
|
Z,
|
|
Resolver::ResolveStatic(cls,
|
|
Library::PrivateCoreLibName(Symbols::ThrowNew()),
|
|
arguments->length(),
|
|
Object::null_array()));
|
|
ASSERT(!func.IsNull());
|
|
return new(Z) StaticCallInstr(token_pos,
|
|
func,
|
|
Object::null_array(), // No names.
|
|
arguments,
|
|
owner()->ic_data_array());
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::BuildThrowNode(ThrowNode* node) {
|
|
if (FLAG_support_debugger) {
|
|
if (node->exception()->IsLiteralNode() ||
|
|
node->exception()->IsLoadLocalNode() ||
|
|
node->exception()->IsClosureNode()) {
|
|
AddInstruction(new(Z) DebugStepCheckInstr(
|
|
node->token_pos(), RawPcDescriptors::kRuntimeCall));
|
|
}
|
|
}
|
|
ValueGraphVisitor for_exception(owner());
|
|
node->exception()->Visit(&for_exception);
|
|
Append(for_exception);
|
|
PushArgument(for_exception.value());
|
|
Instruction* instr = NULL;
|
|
if (node->stacktrace() == NULL) {
|
|
instr = new(Z) ThrowInstr(node->token_pos());
|
|
} else {
|
|
ValueGraphVisitor for_stack_trace(owner());
|
|
node->stacktrace()->Visit(&for_stack_trace);
|
|
Append(for_stack_trace);
|
|
PushArgument(for_stack_trace.value());
|
|
instr = new(Z) ReThrowInstr(node->token_pos(), owner()->catch_try_index());
|
|
}
|
|
AddInstruction(instr);
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitThrowNode(ThrowNode* node) {
|
|
BuildThrowNode(node);
|
|
CloseFragment();
|
|
}
|
|
|
|
|
|
// A throw cannot be part of an expression, however, the parser may replace
|
|
// certain expression nodes with a throw. In that case generate a literal null
|
|
// so that the fragment is not closed in the middle of an expression.
|
|
void ValueGraphVisitor::VisitThrowNode(ThrowNode* node) {
|
|
BuildThrowNode(node);
|
|
ReturnDefinition(new(Z) ConstantInstr(
|
|
Instance::ZoneHandle(Z, Instance::null())));
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitInlinedFinallyNode(InlinedFinallyNode* node) {
|
|
InlineBailout("EffectGraphVisitor::VisitInlinedFinallyNode (exception)");
|
|
const intptr_t try_index = owner()->try_index();
|
|
if (try_index >= 0) {
|
|
// We are about to generate code for an inlined finally block. Exceptions
|
|
// thrown in this block of code should be treated as though they are
|
|
// thrown not from the current try block but the outer try block if any.
|
|
intptr_t outer_try_index = node->try_index();
|
|
owner()->set_try_index(outer_try_index);
|
|
}
|
|
|
|
// Note: do not restore the saved_try_context here since the inlined
|
|
// code is running at he context level of the return or jump instruction
|
|
// that follows the inlined code. See issue 22822.
|
|
|
|
JoinEntryInstr* finally_entry =
|
|
new(Z) JoinEntryInstr(owner()->AllocateBlockId(), owner()->try_index());
|
|
EffectGraphVisitor for_finally_block(owner());
|
|
node->finally_block()->Visit(&for_finally_block);
|
|
|
|
if (try_index >= 0) {
|
|
owner()->set_try_index(try_index);
|
|
}
|
|
|
|
if (for_finally_block.is_open()) {
|
|
JoinEntryInstr* after_finally =
|
|
new(Z) JoinEntryInstr(owner()->AllocateBlockId(), owner()->try_index());
|
|
for_finally_block.Goto(after_finally);
|
|
for_finally_block.exit_ = after_finally;
|
|
}
|
|
|
|
Goto(finally_entry);
|
|
AppendFragment(finally_entry, for_finally_block);
|
|
exit_ = for_finally_block.exit_;
|
|
}
|
|
|
|
|
|
void EffectGraphVisitor::VisitStopNode(StopNode* node) {
|
|
AddInstruction(new(Z) StopInstr(node->message()));
|
|
}
|
|
|
|
|
|
FlowGraph* FlowGraphBuilder::BuildGraph() {
|
|
if (FLAG_print_ast) {
|
|
// Print the function ast before IL generation.
|
|
AstPrinter::PrintFunctionNodes(parsed_function());
|
|
}
|
|
if (FLAG_print_scopes) {
|
|
AstPrinter::PrintFunctionScope(parsed_function());
|
|
}
|
|
TargetEntryInstr* normal_entry =
|
|
new(Z) TargetEntryInstr(AllocateBlockId(),
|
|
CatchClauseNode::kInvalidTryIndex);
|
|
graph_entry_ =
|
|
new(Z) GraphEntryInstr(parsed_function(), normal_entry, osr_id_);
|
|
EffectGraphVisitor for_effect(this);
|
|
parsed_function().node_sequence()->Visit(&for_effect);
|
|
AppendFragment(normal_entry, for_effect);
|
|
// Check that the graph is properly terminated.
|
|
ASSERT(!for_effect.is_open());
|
|
|
|
// When compiling for OSR, use a depth first search to prune instructions
|
|
// unreachable from the OSR entry. Catch entries are always considered
|
|
// reachable, even if they become unreachable after OSR.
|
|
if (osr_id_ != Isolate::kNoDeoptId) {
|
|
PruneUnreachable();
|
|
}
|
|
|
|
FlowGraph* graph =
|
|
new(Z) FlowGraph(parsed_function(), graph_entry_, last_used_block_id_);
|
|
return graph;
|
|
}
|
|
|
|
|
|
void FlowGraphBuilder::PruneUnreachable() {
|
|
ASSERT(osr_id_ != Isolate::kNoDeoptId);
|
|
BitVector* block_marks = new(Z) BitVector(Z, last_used_block_id_ + 1);
|
|
bool found = graph_entry_->PruneUnreachable(this, graph_entry_, NULL, osr_id_,
|
|
block_marks);
|
|
ASSERT(found);
|
|
}
|
|
|
|
|
|
void FlowGraphBuilder::Bailout(const char* reason) const {
|
|
const Function& function = parsed_function_.function();
|
|
Report::MessageF(Report::kBailout,
|
|
Script::Handle(function.script()),
|
|
function.token_pos(),
|
|
"FlowGraphBuilder Bailout: %s %s",
|
|
String::Handle(function.name()).ToCString(),
|
|
reason);
|
|
UNREACHABLE();
|
|
}
|
|
|
|
} // namespace dart
|