Alexander Markov
c6c4748185
Change-Id: I09192e4e929a397920c217b605580f8c4880e7c2 Reviewed-on: https://dart-review.googlesource.com/74002 Commit-Queue: Alexander Markov <alexmarkov@google.com> Reviewed-by: Vyacheslav Egorov <vegorov@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com> Reviewed-by: Régis Crelier <regis@google.com>
95 lines
3.2 KiB
C++
95 lines
3.2 KiB
C++
// Copyright (c) 2017, 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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#ifndef RUNTIME_VM_COMPILER_FRONTEND_PROLOGUE_BUILDER_H_
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#define RUNTIME_VM_COMPILER_FRONTEND_PROLOGUE_BUILDER_H_
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#if !defined(DART_PRECOMPILED_RUNTIME)
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#include "vm/compiler/frontend/base_flow_graph_builder.h"
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namespace dart {
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namespace kernel {
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// Responsible for building IR code for prologues of functions.
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//
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// This code handles initialization of local variables which the
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// prologue needs to setup, including initialization of the:
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//
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// * current context variable, from the passed closure object
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// * function_type_arguments variable, from the stack above fp
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// * raw parameter variables, from the stack above fp
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//
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// if needed.
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//
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// Furthermore it performs all necessary checks which could lead into a
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// no-such-method bailout, including check that:
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//
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// * the number of passed positional arguments is correct
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// * the names of passed named arguments are correct
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// * the number of function type arguments is correct
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//
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// if needed.
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//
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// Most of these things are done by interpreting the caller-supplied arguments
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// descriptor.
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class PrologueBuilder : public BaseFlowGraphBuilder {
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public:
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PrologueBuilder(const ParsedFunction* parsed_function,
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intptr_t last_used_id,
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bool compiling_for_osr,
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bool is_inlining)
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: BaseFlowGraphBuilder(parsed_function, last_used_id),
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compiling_for_osr_(compiling_for_osr),
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is_inlining_(is_inlining) {}
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BlockEntryInstr* BuildPrologue(BlockEntryInstr* entry,
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PrologueInfo* prologue_info);
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Fragment BuildOptionalParameterHandling(JoinEntryInstr* nsm,
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LocalVariable* temp_var);
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static bool HasEmptyPrologue(const Function& function);
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static bool PrologueSkippableOnUncheckedEntry(const Function& function);
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intptr_t last_used_block_id() const { return last_used_block_id_; }
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private:
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Fragment BuildTypeArgumentsLengthCheck(JoinEntryInstr* nsm,
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bool expect_type_args);
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Fragment BuildFixedParameterLengthChecks(JoinEntryInstr* nsm);
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Fragment BuildClosureContextHandling();
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Fragment BuildTypeArgumentsHandling(JoinEntryInstr* nsm);
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LocalVariable* ParameterVariable(intptr_t index) {
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return parsed_function_->RawParameterVariable(index);
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}
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const Instance& DefaultParameterValueAt(intptr_t i) {
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if (parsed_function_->default_parameter_values() != NULL) {
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return parsed_function_->DefaultParameterValueAt(i);
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}
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ASSERT(parsed_function_->function().kind() ==
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RawFunction::kNoSuchMethodDispatcher);
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return Instance::null_instance();
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}
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void SortOptionalNamedParametersInto(int* opt_param_position,
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int num_fixed_params,
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int num_params);
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bool compiling_for_osr_;
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bool is_inlining_;
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};
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} // namespace kernel
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} // namespace dart
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#endif // !defined(DART_PRECOMPILED_RUNTIME)
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#endif // RUNTIME_VM_COMPILER_FRONTEND_PROLOGUE_BUILDER_H_
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