Kevin Millikin
a0965a641f
Revert a pair of commits that cause failure of the Kernel continuation transformer:cba7e3e79a4fe4f177deR=kustermann@google.com Review-Url: https://codereview.chromium.org/2718353002 .
2277 lines
79 KiB
C++
2277 lines
79 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/compiler.h"
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#include "vm/assembler.h"
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#include "vm/ast_printer.h"
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#include "vm/block_scheduler.h"
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#include "vm/branch_optimizer.h"
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#include "vm/cha.h"
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#include "vm/code_generator.h"
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#include "vm/code_patcher.h"
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#include "vm/constant_propagator.h"
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#include "vm/dart_entry.h"
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#include "vm/debugger.h"
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#include "vm/deopt_instructions.h"
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#include "vm/kernel.h"
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#include "vm/kernel_to_il.h"
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#include "vm/disassembler.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_allocator.h"
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#include "vm/flow_graph_builder.h"
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#include "vm/flow_graph_compiler.h"
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#include "vm/flow_graph_inliner.h"
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#include "vm/flow_graph_range_analysis.h"
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#include "vm/flow_graph_type_propagator.h"
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#include "vm/il_printer.h"
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#include "vm/jit_optimizer.h"
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#include "vm/longjump.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/precompiler.h"
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#include "vm/redundancy_elimination.h"
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#include "vm/regexp_parser.h"
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#include "vm/regexp_assembler.h"
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#include "vm/symbols.h"
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#include "vm/tags.h"
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#include "vm/thread_registry.h"
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#include "vm/timeline.h"
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#include "vm/timer.h"
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namespace dart {
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DEFINE_FLAG(bool,
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allocation_sinking,
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true,
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"Attempt to sink temporary allocations to side exits");
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DEFINE_FLAG(bool,
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common_subexpression_elimination,
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true,
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"Do common subexpression elimination.");
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DEFINE_FLAG(
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bool,
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constant_propagation,
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true,
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"Do conditional constant propagation/unreachable code elimination.");
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DEFINE_FLAG(
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int,
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max_deoptimization_counter_threshold,
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16,
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"How many times we allow deoptimization before we disallow optimization.");
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DEFINE_FLAG(bool,
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loop_invariant_code_motion,
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true,
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"Do loop invariant code motion.");
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DEFINE_FLAG(charp, optimization_filter, NULL, "Optimize only named function");
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DEFINE_FLAG(bool, print_flow_graph, false, "Print the IR flow graph.");
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DEFINE_FLAG(bool,
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print_flow_graph_optimized,
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false,
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"Print the IR flow graph when optimizing.");
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DEFINE_FLAG(bool,
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print_ic_data_map,
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false,
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"Print the deopt-id to ICData map in optimizing compiler.");
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DEFINE_FLAG(bool, print_code_source_map, false, "Print code source map.");
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DEFINE_FLAG(bool, range_analysis, true, "Enable range analysis");
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DEFINE_FLAG(bool,
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stress_test_background_compilation,
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false,
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"Keep background compiler running all the time");
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DEFINE_FLAG(bool,
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stop_on_excessive_deoptimization,
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false,
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"Debugging: stops program if deoptimizing same function too often");
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DEFINE_FLAG(bool, trace_compiler, false, "Trace compiler operations.");
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DEFINE_FLAG(bool,
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trace_failed_optimization_attempts,
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false,
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"Traces all failed optimization attempts");
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DEFINE_FLAG(bool,
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trace_optimizing_compiler,
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false,
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"Trace only optimizing compiler operations.");
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DEFINE_FLAG(bool, trace_bailout, false, "Print bailout from ssa compiler.");
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DEFINE_FLAG(bool, use_inlining, true, "Enable call-site inlining");
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DEFINE_FLAG(bool,
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verify_compiler,
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false,
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"Enable compiler verification assertions");
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DECLARE_FLAG(bool, huge_method_cutoff_in_code_size);
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DECLARE_FLAG(bool, trace_failed_optimization_attempts);
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DECLARE_FLAG(bool, trace_irregexp);
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#ifndef DART_PRECOMPILED_RUNTIME
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bool UseKernelFrontEndFor(ParsedFunction* parsed_function) {
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const Function& function = parsed_function->function();
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return (function.kernel_function() != NULL) ||
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(function.kind() == RawFunction::kNoSuchMethodDispatcher) ||
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(function.kind() == RawFunction::kInvokeFieldDispatcher);
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}
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void DartCompilationPipeline::ParseFunction(ParsedFunction* parsed_function) {
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if (!UseKernelFrontEndFor(parsed_function)) {
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Parser::ParseFunction(parsed_function);
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parsed_function->AllocateVariables();
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}
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}
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FlowGraph* DartCompilationPipeline::BuildFlowGraph(
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Zone* zone,
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ParsedFunction* parsed_function,
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const ZoneGrowableArray<const ICData*>& ic_data_array,
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intptr_t osr_id) {
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if (UseKernelFrontEndFor(parsed_function)) {
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kernel::TreeNode* node = static_cast<kernel::TreeNode*>(
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parsed_function->function().kernel_function());
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kernel::FlowGraphBuilder builder(node, parsed_function, ic_data_array, NULL,
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osr_id);
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FlowGraph* graph = builder.BuildGraph();
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ASSERT(graph != NULL);
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return graph;
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}
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FlowGraphBuilder builder(*parsed_function, ic_data_array,
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NULL, // NULL = not inlining.
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osr_id);
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return builder.BuildGraph();
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}
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void DartCompilationPipeline::FinalizeCompilation(FlowGraph* flow_graph) {}
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void IrregexpCompilationPipeline::ParseFunction(
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ParsedFunction* parsed_function) {
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RegExpParser::ParseFunction(parsed_function);
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// Variables are allocated after compilation.
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}
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FlowGraph* IrregexpCompilationPipeline::BuildFlowGraph(
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Zone* zone,
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ParsedFunction* parsed_function,
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const ZoneGrowableArray<const ICData*>& ic_data_array,
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intptr_t osr_id) {
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// Compile to the dart IR.
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RegExpEngine::CompilationResult result = RegExpEngine::CompileIR(
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parsed_function->regexp_compile_data(), parsed_function, ic_data_array);
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backtrack_goto_ = result.backtrack_goto;
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// Allocate variables now that we know the number of locals.
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parsed_function->AllocateIrregexpVariables(result.num_stack_locals);
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// Build the flow graph.
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FlowGraphBuilder builder(*parsed_function, ic_data_array,
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NULL, // NULL = not inlining.
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osr_id);
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return new (zone)
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FlowGraph(*parsed_function, result.graph_entry, result.num_blocks);
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}
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void IrregexpCompilationPipeline::FinalizeCompilation(FlowGraph* flow_graph) {
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backtrack_goto_->ComputeOffsetTable();
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}
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CompilationPipeline* CompilationPipeline::New(Zone* zone,
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const Function& function) {
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if (function.IsIrregexpFunction()) {
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return new (zone) IrregexpCompilationPipeline();
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} else {
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return new (zone) DartCompilationPipeline();
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}
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}
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// Compile a function. Should call only if the function has not been compiled.
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// Arg0: function object.
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DEFINE_RUNTIME_ENTRY(CompileFunction, 1) {
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const Function& function = Function::CheckedHandle(arguments.ArgAt(0));
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ASSERT(!function.HasCode());
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const Error& error =
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Error::Handle(Compiler::CompileFunction(thread, function));
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if (!error.IsNull()) {
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if (error.IsLanguageError()) {
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Exceptions::ThrowCompileTimeError(LanguageError::Cast(error));
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UNREACHABLE();
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}
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Exceptions::PropagateError(error);
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}
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}
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bool Compiler::CanOptimizeFunction(Thread* thread, const Function& function) {
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if (FLAG_support_debugger) {
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Isolate* isolate = thread->isolate();
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if (isolate->debugger()->IsStepping() ||
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isolate->debugger()->HasBreakpoint(function, thread->zone())) {
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// We cannot set breakpoints and single step in optimized code,
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// so do not optimize the function.
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function.set_usage_counter(0);
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return false;
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}
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}
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if (function.deoptimization_counter() >=
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FLAG_max_deoptimization_counter_threshold) {
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if (FLAG_trace_failed_optimization_attempts ||
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FLAG_stop_on_excessive_deoptimization) {
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THR_Print("Too many deoptimizations: %s\n",
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function.ToFullyQualifiedCString());
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if (FLAG_stop_on_excessive_deoptimization) {
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FATAL("Stop on excessive deoptimization");
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}
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}
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// The function will not be optimized any longer. This situation can occur
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// mostly with small optimization counter thresholds.
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function.SetIsOptimizable(false);
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function.set_usage_counter(INT_MIN);
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return false;
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}
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if (FLAG_optimization_filter != NULL) {
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// FLAG_optimization_filter is a comma-separated list of strings that are
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// matched against the fully-qualified function name.
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char* save_ptr; // Needed for strtok_r.
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const char* function_name = function.ToFullyQualifiedCString();
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intptr_t len = strlen(FLAG_optimization_filter) + 1; // Length with \0.
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char* filter = new char[len];
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strncpy(filter, FLAG_optimization_filter, len); // strtok modifies arg 1.
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char* token = strtok_r(filter, ",", &save_ptr);
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bool found = false;
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while (token != NULL) {
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if (strstr(function_name, token) != NULL) {
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found = true;
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break;
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}
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token = strtok_r(NULL, ",", &save_ptr);
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}
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delete[] filter;
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if (!found) {
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function.set_usage_counter(INT_MIN);
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return false;
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}
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}
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if (!function.IsOptimizable()) {
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// Huge methods (code size above --huge_method_cutoff_in_code_size) become
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// non-optimizable only after the code has been generated.
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if (FLAG_trace_failed_optimization_attempts) {
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THR_Print("Not optimizable: %s\n", function.ToFullyQualifiedCString());
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}
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function.set_usage_counter(INT_MIN);
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return false;
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}
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return true;
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}
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bool Compiler::IsBackgroundCompilation() {
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// For now: compilation in non mutator thread is the background compoilation.
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return !Thread::Current()->IsMutatorThread();
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}
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RawError* Compiler::Compile(const Library& library, const Script& script) {
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LongJumpScope jump;
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if (setjmp(*jump.Set()) == 0) {
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Thread* const thread = Thread::Current();
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StackZone zone(thread);
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if (FLAG_trace_compiler) {
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const String& script_url = String::Handle(script.url());
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// TODO(iposva): Extract script kind.
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THR_Print("Compiling %s '%s'\n", "", script_url.ToCString());
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}
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const String& library_key = String::Handle(library.private_key());
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script.Tokenize(library_key);
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Parser::ParseCompilationUnit(library, script);
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return Error::null();
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} else {
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Thread* const thread = Thread::Current();
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StackZone zone(thread);
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Error& error = Error::Handle();
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error = thread->sticky_error();
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thread->clear_sticky_error();
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return error.raw();
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}
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UNREACHABLE();
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return Error::null();
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}
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static void AddRelatedClassesToList(
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const Class& cls,
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GrowableHandlePtrArray<const Class>* parse_list,
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GrowableHandlePtrArray<const Class>* patch_list) {
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Zone* zone = Thread::Current()->zone();
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Class& parse_class = Class::Handle(zone);
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AbstractType& interface_type = Type::Handle(zone);
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Array& interfaces = Array::Handle(zone);
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// Add all the interfaces implemented by the class that have not been
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// already parsed to the parse list. Mark the interface as parsed so that
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// we don't recursively add it back into the list.
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interfaces ^= cls.interfaces();
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for (intptr_t i = 0; i < interfaces.Length(); i++) {
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interface_type ^= interfaces.At(i);
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parse_class ^= interface_type.type_class();
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if (!parse_class.is_finalized() && !parse_class.is_marked_for_parsing()) {
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parse_list->Add(parse_class);
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parse_class.set_is_marked_for_parsing();
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}
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}
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// Walk up the super_class chain and add these classes to the list if they
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// have not been already parsed to the parse list. Mark the class as parsed
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// so that we don't recursively add it back into the list.
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parse_class ^= cls.SuperClass();
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while (!parse_class.IsNull()) {
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if (!parse_class.is_finalized() && !parse_class.is_marked_for_parsing()) {
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parse_list->Add(parse_class);
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parse_class.set_is_marked_for_parsing();
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}
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parse_class ^= parse_class.SuperClass();
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}
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// Add patch classes if they exist to the parse list if they have not already
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// been parsed and patched. Mark the class as parsed so that we don't
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// recursively add it back into the list.
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parse_class ^= cls.GetPatchClass();
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if (!parse_class.IsNull()) {
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if (!parse_class.is_finalized() && !parse_class.is_marked_for_parsing()) {
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patch_list->Add(parse_class);
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parse_class.set_is_marked_for_parsing();
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}
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}
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}
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RawError* Compiler::CompileClass(const Class& cls) {
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ASSERT(Thread::Current()->IsMutatorThread());
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// If class is a top level class it is already parsed.
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if (cls.IsTopLevel()) {
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return Error::null();
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}
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// If the class is already marked for parsing return immediately.
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if (cls.is_marked_for_parsing()) {
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return Error::null();
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}
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// If the class is a typedef class there is no need to try and
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// compile it. Just finalize it directly.
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if (cls.IsTypedefClass()) {
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#if defined(DEBUG)
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const Class& closure_cls =
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Class::Handle(Isolate::Current()->object_store()->closure_class());
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ASSERT(closure_cls.is_finalized());
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#endif
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LongJumpScope jump;
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if (setjmp(*jump.Set()) == 0) {
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ClassFinalizer::FinalizeClass(cls);
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return Error::null();
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} else {
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Thread* thread = Thread::Current();
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Error& error = Error::Handle(thread->zone());
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error = thread->sticky_error();
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thread->clear_sticky_error();
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return error.raw();
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}
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}
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Thread* const thread = Thread::Current();
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StackZone zone(thread);
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#if !defined(PRODUCT)
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VMTagScope tagScope(thread, VMTag::kCompileClassTagId);
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TimelineDurationScope tds(thread, Timeline::GetCompilerStream(),
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"CompileClass");
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if (tds.enabled()) {
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tds.SetNumArguments(1);
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tds.CopyArgument(0, "class", cls.ToCString());
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}
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#endif // !defined(PRODUCT)
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// We remember all the classes that are being compiled in these lists. This
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// also allows us to reset the marked_for_parsing state in case we see an
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// error.
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GrowableHandlePtrArray<const Class> parse_list(thread->zone(), 4);
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GrowableHandlePtrArray<const Class> patch_list(thread->zone(), 4);
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// Parse the class and all the interfaces it implements and super classes.
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LongJumpScope jump;
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if (setjmp(*jump.Set()) == 0) {
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if (FLAG_trace_compiler) {
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THR_Print("Compiling Class '%s'\n", cls.ToCString());
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}
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// Add the primary class which needs to be parsed to the parse list.
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// Mark the class as parsed so that we don't recursively add the same
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// class back into the list.
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parse_list.Add(cls);
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cls.set_is_marked_for_parsing();
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// Add all super classes, interface classes and patch class if one
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// exists to the corresponding lists.
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// NOTE: The parse_list array keeps growing as more classes are added
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// to it by AddRelatedClassesToList. It is not OK to hoist
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// parse_list.Length() into a local variable and iterate using the local
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// variable.
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for (intptr_t i = 0; i < parse_list.length(); i++) {
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AddRelatedClassesToList(parse_list.At(i), &parse_list, &patch_list);
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}
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// Parse all the classes that have been added above.
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for (intptr_t i = (parse_list.length() - 1); i >= 0; i--) {
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const Class& parse_class = parse_list.At(i);
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ASSERT(!parse_class.IsNull());
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Parser::ParseClass(parse_class);
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}
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// Parse all the patch classes that have been added above.
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for (intptr_t i = 0; i < patch_list.length(); i++) {
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const Class& parse_class = patch_list.At(i);
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ASSERT(!parse_class.IsNull());
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Parser::ParseClass(parse_class);
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}
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// Finalize these classes.
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for (intptr_t i = (parse_list.length() - 1); i >= 0; i--) {
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const Class& parse_class = parse_list.At(i);
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ASSERT(!parse_class.IsNull());
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ClassFinalizer::FinalizeClass(parse_class);
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parse_class.reset_is_marked_for_parsing();
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}
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for (intptr_t i = (patch_list.length() - 1); i >= 0; i--) {
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const Class& parse_class = patch_list.At(i);
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ASSERT(!parse_class.IsNull());
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ClassFinalizer::FinalizeClass(parse_class);
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parse_class.reset_is_marked_for_parsing();
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}
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return Error::null();
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} else {
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// Reset the marked for parsing flags.
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for (intptr_t i = 0; i < parse_list.length(); i++) {
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const Class& parse_class = parse_list.At(i);
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if (parse_class.is_marked_for_parsing()) {
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parse_class.reset_is_marked_for_parsing();
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}
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}
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for (intptr_t i = 0; i < patch_list.length(); i++) {
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const Class& parse_class = patch_list.At(i);
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if (parse_class.is_marked_for_parsing()) {
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parse_class.reset_is_marked_for_parsing();
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}
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}
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Error& error = Error::Handle(zone.GetZone());
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error = thread->sticky_error();
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thread->clear_sticky_error();
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return error.raw();
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}
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UNREACHABLE();
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return Error::null();
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}
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class CompileParsedFunctionHelper : public ValueObject {
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public:
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CompileParsedFunctionHelper(ParsedFunction* parsed_function,
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bool optimized,
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intptr_t osr_id)
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: parsed_function_(parsed_function),
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optimized_(optimized),
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osr_id_(osr_id),
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thread_(Thread::Current()),
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loading_invalidation_gen_at_start_(
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isolate()->loading_invalidation_gen()) {}
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bool Compile(CompilationPipeline* pipeline);
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private:
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ParsedFunction* parsed_function() const { return parsed_function_; }
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bool optimized() const { return optimized_; }
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intptr_t osr_id() const { return osr_id_; }
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Thread* thread() const { return thread_; }
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Isolate* isolate() const { return thread_->isolate(); }
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intptr_t loading_invalidation_gen_at_start() const {
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return loading_invalidation_gen_at_start_;
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}
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void FinalizeCompilation(Assembler* assembler,
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FlowGraphCompiler* graph_compiler,
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FlowGraph* flow_graph);
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void CheckIfBackgroundCompilerIsBeingStopped();
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ParsedFunction* parsed_function_;
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const bool optimized_;
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const intptr_t osr_id_;
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Thread* const thread_;
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const intptr_t loading_invalidation_gen_at_start_;
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DISALLOW_COPY_AND_ASSIGN(CompileParsedFunctionHelper);
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};
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void CompileParsedFunctionHelper::FinalizeCompilation(
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Assembler* assembler,
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FlowGraphCompiler* graph_compiler,
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FlowGraph* flow_graph) {
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ASSERT(!FLAG_precompiled_mode);
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const Function& function = parsed_function()->function();
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Zone* const zone = thread()->zone();
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CSTAT_TIMER_SCOPE(thread(), codefinalizer_timer);
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// CreateDeoptInfo uses the object pool and needs to be done before
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// FinalizeCode.
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const Array& deopt_info_array =
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Array::Handle(zone, graph_compiler->CreateDeoptInfo(assembler));
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INC_STAT(thread(), total_code_size,
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deopt_info_array.Length() * sizeof(uword));
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// Allocates instruction object. Since this occurs only at safepoint,
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// there can be no concurrent access to the instruction page.
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const Code& code =
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Code::Handle(Code::FinalizeCode(function, assembler, optimized()));
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code.set_is_optimized(optimized());
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code.set_owner(function);
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if (!function.IsOptimizable()) {
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// A function with huge unoptimized code can become non-optimizable
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// after generating unoptimized code.
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function.set_usage_counter(INT_MIN);
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}
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graph_compiler->FinalizePcDescriptors(code);
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code.set_deopt_info_array(deopt_info_array);
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graph_compiler->FinalizeStackMaps(code);
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graph_compiler->FinalizeVarDescriptors(code);
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graph_compiler->FinalizeExceptionHandlers(code);
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graph_compiler->FinalizeStaticCallTargetsTable(code);
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graph_compiler->FinalizeCodeSourceMap(code);
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if (optimized()) {
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bool code_was_installed = false;
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// Installs code while at safepoint.
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if (thread()->IsMutatorThread()) {
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const bool is_osr = osr_id() != Compiler::kNoOSRDeoptId;
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function.InstallOptimizedCode(code, is_osr);
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code_was_installed = true;
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} else {
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// Background compilation.
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// Before installing code check generation counts if the code may
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// have become invalid.
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const bool trace_compiler =
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FLAG_trace_compiler || FLAG_trace_optimizing_compiler;
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bool code_is_valid = true;
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if (!flow_graph->parsed_function().guarded_fields()->is_empty()) {
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const ZoneGrowableArray<const Field*>& guarded_fields =
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*flow_graph->parsed_function().guarded_fields();
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Field& original = Field::Handle();
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for (intptr_t i = 0; i < guarded_fields.length(); i++) {
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const Field& field = *guarded_fields[i];
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ASSERT(!field.IsOriginal());
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original = field.Original();
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if (!field.IsConsistentWith(original)) {
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code_is_valid = false;
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if (trace_compiler) {
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THR_Print("--> FAIL: Field %s guarded state changed.",
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field.ToCString());
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}
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break;
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}
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}
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}
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if (loading_invalidation_gen_at_start() !=
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isolate()->loading_invalidation_gen()) {
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code_is_valid = false;
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if (trace_compiler) {
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THR_Print("--> FAIL: Loading invalidation.");
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}
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}
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if (!thread()->cha()->IsConsistentWithCurrentHierarchy()) {
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code_is_valid = false;
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if (trace_compiler) {
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THR_Print("--> FAIL: Class hierarchy has new subclasses.");
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}
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}
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// Setting breakpoints at runtime could make a function non-optimizable.
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if (code_is_valid && Compiler::CanOptimizeFunction(thread(), function)) {
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const bool is_osr = osr_id() != Compiler::kNoOSRDeoptId;
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ASSERT(!is_osr); // OSR is not compiled in background.
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function.InstallOptimizedCode(code, is_osr);
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code_was_installed = true;
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}
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if (function.usage_counter() < 0) {
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// Reset to 0 so that it can be recompiled if needed.
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if (code_is_valid) {
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function.set_usage_counter(0);
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} else {
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// Trigger another optimization pass soon.
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function.set_usage_counter(FLAG_optimization_counter_threshold - 100);
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}
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}
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}
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if (code_was_installed) {
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// The generated code was compiled under certain assumptions about
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// class hierarchy and field types. Register these dependencies
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// to ensure that the code will be deoptimized if they are violated.
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thread()->cha()->RegisterDependencies(code);
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const ZoneGrowableArray<const Field*>& guarded_fields =
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*flow_graph->parsed_function().guarded_fields();
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Field& field = Field::Handle();
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for (intptr_t i = 0; i < guarded_fields.length(); i++) {
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field = guarded_fields[i]->Original();
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field.RegisterDependentCode(code);
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}
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}
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} else { // not optimized.
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if (function.ic_data_array() == Array::null()) {
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function.SaveICDataMap(
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graph_compiler->deopt_id_to_ic_data(),
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Array::Handle(zone, graph_compiler->edge_counters_array()));
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}
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function.set_unoptimized_code(code);
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function.AttachCode(code);
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}
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if (parsed_function()->HasDeferredPrefixes()) {
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ASSERT(!FLAG_load_deferred_eagerly);
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ZoneGrowableArray<const LibraryPrefix*>* prefixes =
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parsed_function()->deferred_prefixes();
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for (intptr_t i = 0; i < prefixes->length(); i++) {
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(*prefixes)[i]->RegisterDependentCode(code);
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}
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}
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}
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void CompileParsedFunctionHelper::CheckIfBackgroundCompilerIsBeingStopped() {
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ASSERT(Compiler::IsBackgroundCompilation());
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if (!isolate()->background_compiler()->is_running()) {
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// The background compiler is being stopped.
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Compiler::AbortBackgroundCompilation(
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Thread::kNoDeoptId, "Background compilation is being stopped");
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}
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}
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// Return false if bailed out.
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// If optimized_result_code is not NULL then it is caller's responsibility
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// to install code.
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bool CompileParsedFunctionHelper::Compile(CompilationPipeline* pipeline) {
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ASSERT(!FLAG_precompiled_mode);
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const Function& function = parsed_function()->function();
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if (optimized() && !function.IsOptimizable()) {
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return false;
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}
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bool is_compiled = false;
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Zone* const zone = thread()->zone();
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NOT_IN_PRODUCT(TimelineStream* compiler_timeline =
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Timeline::GetCompilerStream());
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CSTAT_TIMER_SCOPE(thread(), codegen_timer);
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HANDLESCOPE(thread());
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// We may reattempt compilation if the function needs to be assembled using
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// far branches on ARM and MIPS. In the else branch of the setjmp call,
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// done is set to false, and use_far_branches is set to true if there is a
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// longjmp from the ARM or MIPS assemblers. In all other paths through this
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// while loop, done is set to true. use_far_branches is always false on ia32
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// and x64.
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volatile bool done = false;
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// volatile because the variable may be clobbered by a longjmp.
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volatile bool use_far_branches = false;
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const bool use_speculative_inlining = false;
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while (!done) {
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const intptr_t prev_deopt_id = thread()->deopt_id();
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thread()->set_deopt_id(0);
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LongJumpScope jump;
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const intptr_t val = setjmp(*jump.Set());
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if (val == 0) {
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FlowGraph* flow_graph = NULL;
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// Class hierarchy analysis is registered with the thread in the
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// constructor and unregisters itself upon destruction.
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CHA cha(thread());
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// TimerScope needs an isolate to be properly terminated in case of a
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// LongJump.
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{
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CSTAT_TIMER_SCOPE(thread(), graphbuilder_timer);
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ZoneGrowableArray<const ICData*>* ic_data_array =
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new (zone) ZoneGrowableArray<const ICData*>();
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if (optimized()) {
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// Extract type feedback before the graph is built, as the graph
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// builder uses it to attach it to nodes.
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// In background compilation the deoptimization counter may have
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// already reached the limit.
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ASSERT(Compiler::IsBackgroundCompilation() ||
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(function.deoptimization_counter() <
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FLAG_max_deoptimization_counter_threshold));
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// 'Freeze' ICData in background compilation so that it does not
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// change while compiling.
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const bool clone_ic_data = Compiler::IsBackgroundCompilation();
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function.RestoreICDataMap(ic_data_array, clone_ic_data);
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if (Compiler::IsBackgroundCompilation() &&
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(function.ic_data_array() == Array::null())) {
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Compiler::AbortBackgroundCompilation(
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Thread::kNoDeoptId, "RestoreICDataMap: ICData array cleared.");
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}
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if (FLAG_print_ic_data_map) {
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for (intptr_t i = 0; i < ic_data_array->length(); i++) {
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if ((*ic_data_array)[i] != NULL) {
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THR_Print("%" Pd " ", i);
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FlowGraphPrinter::PrintICData(*(*ic_data_array)[i]);
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}
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}
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}
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}
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NOT_IN_PRODUCT(TimelineDurationScope tds(thread(), compiler_timeline,
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"BuildFlowGraph"));
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flow_graph = pipeline->BuildFlowGraph(zone, parsed_function(),
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*ic_data_array, osr_id());
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}
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const bool print_flow_graph =
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(FLAG_print_flow_graph ||
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(optimized() && FLAG_print_flow_graph_optimized)) &&
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FlowGraphPrinter::ShouldPrint(function);
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if (print_flow_graph) {
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if (osr_id() == Compiler::kNoOSRDeoptId) {
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FlowGraphPrinter::PrintGraph("Before Optimizations", flow_graph);
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} else {
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FlowGraphPrinter::PrintGraph("For OSR", flow_graph);
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}
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}
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BlockScheduler block_scheduler(flow_graph);
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const bool reorder_blocks =
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FlowGraph::ShouldReorderBlocks(function, optimized());
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if (reorder_blocks) {
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NOT_IN_PRODUCT(TimelineDurationScope tds(
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thread(), compiler_timeline, "BlockScheduler::AssignEdgeWeights"));
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block_scheduler.AssignEdgeWeights();
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}
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if (optimized()) {
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NOT_IN_PRODUCT(TimelineDurationScope tds(thread(), compiler_timeline,
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"ComputeSSA"));
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CSTAT_TIMER_SCOPE(thread(), ssa_timer);
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// Transform to SSA (virtual register 0 and no inlining arguments).
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flow_graph->ComputeSSA(0, NULL);
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DEBUG_ASSERT(flow_graph->VerifyUseLists());
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if (print_flow_graph) {
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FlowGraphPrinter::PrintGraph("After SSA", flow_graph);
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}
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}
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// Maps inline_id_to_function[inline_id] -> function. Top scope
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// function has inline_id 0. The map is populated by the inliner.
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GrowableArray<const Function*> inline_id_to_function;
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// Token position where inlining occured.
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GrowableArray<TokenPosition> inline_id_to_token_pos;
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// For a given inlining-id(index) specifies the caller's inlining-id.
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GrowableArray<intptr_t> caller_inline_id;
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// Collect all instance fields that are loaded in the graph and
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// have non-generic type feedback attached to them that can
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// potentially affect optimizations.
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if (optimized()) {
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NOT_IN_PRODUCT(TimelineDurationScope tds(thread(), compiler_timeline,
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"OptimizationPasses"));
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inline_id_to_function.Add(&function);
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// We do not add the token position now because we don't know the
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// position of the inlined call until later. A side effect of this
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// is that the length of |inline_id_to_function| is always larger
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// than the length of |inline_id_to_token_pos| by one.
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// Top scope function has no caller (-1). We do this because we expect
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// all token positions to be at an inlined call.
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caller_inline_id.Add(-1);
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CSTAT_TIMER_SCOPE(thread(), graphoptimizer_timer);
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JitOptimizer optimizer(flow_graph);
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optimizer.ApplyICData();
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DEBUG_ASSERT(flow_graph->VerifyUseLists());
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// Optimize (a << b) & c patterns, merge operations.
|
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// Run early in order to have more opportunity to optimize left shifts.
|
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flow_graph->TryOptimizePatterns();
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DEBUG_ASSERT(flow_graph->VerifyUseLists());
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FlowGraphInliner::SetInliningId(flow_graph, 0);
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// Inlining (mutates the flow graph)
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if (FLAG_use_inlining) {
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NOT_IN_PRODUCT(TimelineDurationScope tds2(thread(), compiler_timeline,
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"Inlining"));
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CSTAT_TIMER_SCOPE(thread(), graphinliner_timer);
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// Propagate types to create more inlining opportunities.
|
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FlowGraphTypePropagator::Propagate(flow_graph);
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DEBUG_ASSERT(flow_graph->VerifyUseLists());
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// Use propagated class-ids to create more inlining opportunities.
|
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optimizer.ApplyClassIds();
|
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DEBUG_ASSERT(flow_graph->VerifyUseLists());
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|
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FlowGraphInliner inliner(flow_graph, &inline_id_to_function,
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&inline_id_to_token_pos, &caller_inline_id,
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use_speculative_inlining,
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/*inlining_black_list=*/NULL,
|
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/*precompiler=*/NULL);
|
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inliner.Inline();
|
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// Use lists are maintained and validated by the inliner.
|
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DEBUG_ASSERT(flow_graph->VerifyUseLists());
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}
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|
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// Propagate types and eliminate more type tests.
|
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FlowGraphTypePropagator::Propagate(flow_graph);
|
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DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
|
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{
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NOT_IN_PRODUCT(TimelineDurationScope tds2(thread(), compiler_timeline,
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"ApplyClassIds"));
|
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// Use propagated class-ids to optimize further.
|
|
optimizer.ApplyClassIds();
|
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DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
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}
|
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|
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// Propagate types for potentially newly added instructions by
|
|
// ApplyClassIds(). Must occur before canonicalization.
|
|
FlowGraphTypePropagator::Propagate(flow_graph);
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
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|
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// Do optimizations that depend on the propagated type information.
|
|
if (flow_graph->Canonicalize()) {
|
|
// Invoke Canonicalize twice in order to fully canonicalize patterns
|
|
// like "if (a & const == 0) { }".
|
|
flow_graph->Canonicalize();
|
|
}
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
|
|
{
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(thread(), compiler_timeline,
|
|
"BranchSimplifier"));
|
|
BranchSimplifier::Simplify(flow_graph);
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
|
|
IfConverter::Simplify(flow_graph);
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
}
|
|
|
|
if (FLAG_constant_propagation) {
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(thread(), compiler_timeline,
|
|
"ConstantPropagation");
|
|
ConstantPropagator::Optimize(flow_graph));
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
// A canonicalization pass to remove e.g. smi checks on smi constants.
|
|
flow_graph->Canonicalize();
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
// Canonicalization introduced more opportunities for constant
|
|
// propagation.
|
|
ConstantPropagator::Optimize(flow_graph);
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
}
|
|
|
|
// Optimistically convert loop phis that have a single non-smi input
|
|
// coming from the loop pre-header into smi-phis.
|
|
if (FLAG_loop_invariant_code_motion) {
|
|
LICM licm(flow_graph);
|
|
licm.OptimisticallySpecializeSmiPhis();
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
}
|
|
|
|
// Propagate types and eliminate even more type tests.
|
|
// Recompute types after constant propagation to infer more precise
|
|
// types for uses that were previously reached by now eliminated phis.
|
|
FlowGraphTypePropagator::Propagate(flow_graph);
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
|
|
{
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(thread(), compiler_timeline,
|
|
"SelectRepresentations"));
|
|
// Where beneficial convert Smi operations into Int32 operations.
|
|
// Only meanigful for 32bit platforms right now.
|
|
flow_graph->WidenSmiToInt32();
|
|
|
|
// Unbox doubles. Performed after constant propagation to minimize
|
|
// interference from phis merging double values and tagged
|
|
// values coming from dead paths.
|
|
flow_graph->SelectRepresentations();
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
}
|
|
|
|
{
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(
|
|
thread(), compiler_timeline, "CommonSubexpressionElinination"));
|
|
if (FLAG_common_subexpression_elimination ||
|
|
FLAG_loop_invariant_code_motion) {
|
|
flow_graph->ComputeBlockEffects();
|
|
}
|
|
|
|
if (FLAG_common_subexpression_elimination) {
|
|
if (DominatorBasedCSE::Optimize(flow_graph)) {
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
flow_graph->Canonicalize();
|
|
// Do another round of CSE to take secondary effects into account:
|
|
// e.g. when eliminating dependent loads (a.x[0] + a.x[0])
|
|
// TODO(fschneider): Change to a one-pass optimization pass.
|
|
if (DominatorBasedCSE::Optimize(flow_graph)) {
|
|
flow_graph->Canonicalize();
|
|
}
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
}
|
|
}
|
|
|
|
// Run loop-invariant code motion right after load elimination since
|
|
// it depends on the numbering of loads from the previous
|
|
// load-elimination.
|
|
if (FLAG_loop_invariant_code_motion) {
|
|
flow_graph->RenameUsesDominatedByRedefinitions();
|
|
DEBUG_ASSERT(flow_graph->VerifyRedefinitions());
|
|
LICM licm(flow_graph);
|
|
licm.Optimize();
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
}
|
|
flow_graph->RemoveRedefinitions();
|
|
}
|
|
|
|
// Optimize (a << b) & c patterns, merge operations.
|
|
// Run after CSE in order to have more opportunity to merge
|
|
// instructions that have same inputs.
|
|
flow_graph->TryOptimizePatterns();
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
|
|
{
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(thread(), compiler_timeline,
|
|
"DeadStoreElimination"));
|
|
DeadStoreElimination::Optimize(flow_graph);
|
|
}
|
|
|
|
if (FLAG_range_analysis) {
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(thread(), compiler_timeline,
|
|
"RangeAnalysis"));
|
|
// Propagate types after store-load-forwarding. Some phis may have
|
|
// become smi phis that can be processed by range analysis.
|
|
FlowGraphTypePropagator::Propagate(flow_graph);
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
|
|
// We have to perform range analysis after LICM because it
|
|
// optimistically moves CheckSmi through phis into loop preheaders
|
|
// making some phis smi.
|
|
RangeAnalysis range_analysis(flow_graph);
|
|
range_analysis.Analyze();
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
}
|
|
|
|
if (FLAG_constant_propagation) {
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(
|
|
thread(), compiler_timeline,
|
|
"ConstantPropagator::OptimizeBranches"));
|
|
// Constant propagation can use information from range analysis to
|
|
// find unreachable branch targets and eliminate branches that have
|
|
// the same true- and false-target.
|
|
ConstantPropagator::OptimizeBranches(flow_graph);
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
}
|
|
|
|
// Recompute types after code movement was done to ensure correct
|
|
// reaching types for hoisted values.
|
|
FlowGraphTypePropagator::Propagate(flow_graph);
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
|
|
{
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(
|
|
thread(), compiler_timeline, "TryCatchAnalyzer::Optimize"));
|
|
// Optimize try-blocks.
|
|
TryCatchAnalyzer::Optimize(flow_graph);
|
|
}
|
|
|
|
// Detach environments from the instructions that can't deoptimize.
|
|
// Do it before we attempt to perform allocation sinking to minimize
|
|
// amount of materializations it has to perform.
|
|
flow_graph->EliminateEnvironments();
|
|
|
|
{
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(thread(), compiler_timeline,
|
|
"EliminateDeadPhis"));
|
|
DeadCodeElimination::EliminateDeadPhis(flow_graph);
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
}
|
|
|
|
if (flow_graph->Canonicalize()) {
|
|
flow_graph->Canonicalize();
|
|
}
|
|
|
|
// Attempt to sink allocations of temporary non-escaping objects to
|
|
// the deoptimization path.
|
|
AllocationSinking* sinking = NULL;
|
|
if (FLAG_allocation_sinking &&
|
|
(flow_graph->graph_entry()->SuccessorCount() == 1)) {
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(
|
|
thread(), compiler_timeline, "AllocationSinking::Optimize"));
|
|
// TODO(fschneider): Support allocation sinking with try-catch.
|
|
sinking = new AllocationSinking(flow_graph);
|
|
sinking->Optimize();
|
|
}
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
|
|
DeadCodeElimination::EliminateDeadPhis(flow_graph);
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
|
|
FlowGraphTypePropagator::Propagate(flow_graph);
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
|
|
{
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(thread(), compiler_timeline,
|
|
"SelectRepresentations"));
|
|
// Ensure that all phis inserted by optimization passes have
|
|
// consistent representations.
|
|
flow_graph->SelectRepresentations();
|
|
}
|
|
|
|
if (flow_graph->Canonicalize()) {
|
|
// To fully remove redundant boxing (e.g. BoxDouble used only in
|
|
// environments and UnboxDouble instructions) instruction we
|
|
// first need to replace all their uses and then fold them away.
|
|
// For now we just repeat Canonicalize twice to do that.
|
|
// TODO(vegorov): implement a separate representation folding pass.
|
|
flow_graph->Canonicalize();
|
|
}
|
|
DEBUG_ASSERT(flow_graph->VerifyUseLists());
|
|
|
|
if (sinking != NULL) {
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(
|
|
thread(), compiler_timeline,
|
|
"AllocationSinking::DetachMaterializations"));
|
|
// Remove all MaterializeObject instructions inserted by allocation
|
|
// sinking from the flow graph and let them float on the side
|
|
// referenced only from environments. Register allocator will consider
|
|
// them as part of a deoptimization environment.
|
|
sinking->DetachMaterializations();
|
|
}
|
|
|
|
// Compute and store graph informations (call & instruction counts)
|
|
// to be later used by the inliner.
|
|
FlowGraphInliner::CollectGraphInfo(flow_graph, true);
|
|
|
|
{
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds2(thread(), compiler_timeline,
|
|
"AllocateRegisters"));
|
|
// Perform register allocation on the SSA graph.
|
|
FlowGraphAllocator allocator(*flow_graph);
|
|
allocator.AllocateRegisters();
|
|
}
|
|
|
|
if (reorder_blocks) {
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds(
|
|
thread(), compiler_timeline, "BlockScheduler::ReorderBlocks"));
|
|
block_scheduler.ReorderBlocks();
|
|
}
|
|
|
|
if (print_flow_graph) {
|
|
FlowGraphPrinter::PrintGraph("After Optimizations", flow_graph);
|
|
}
|
|
}
|
|
|
|
ASSERT(inline_id_to_function.length() == caller_inline_id.length());
|
|
Assembler assembler(use_far_branches);
|
|
FlowGraphCompiler graph_compiler(
|
|
&assembler, flow_graph, *parsed_function(), optimized(),
|
|
inline_id_to_function, inline_id_to_token_pos, caller_inline_id);
|
|
{
|
|
CSTAT_TIMER_SCOPE(thread(), graphcompiler_timer);
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds(thread(), compiler_timeline,
|
|
"CompileGraph"));
|
|
graph_compiler.CompileGraph();
|
|
pipeline->FinalizeCompilation(flow_graph);
|
|
}
|
|
{
|
|
NOT_IN_PRODUCT(TimelineDurationScope tds(thread(), compiler_timeline,
|
|
"FinalizeCompilation"));
|
|
if (thread()->IsMutatorThread()) {
|
|
FinalizeCompilation(&assembler, &graph_compiler, flow_graph);
|
|
} else {
|
|
// This part of compilation must be at a safepoint.
|
|
// Stop mutator thread before creating the instruction object and
|
|
// installing code.
|
|
// Mutator thread may not run code while we are creating the
|
|
// instruction object, since the creation of instruction object
|
|
// changes code page access permissions (makes them temporary not
|
|
// executable).
|
|
{
|
|
CheckIfBackgroundCompilerIsBeingStopped();
|
|
SafepointOperationScope safepoint_scope(thread());
|
|
// Do not Garbage collect during this stage and instead allow the
|
|
// heap to grow.
|
|
NoHeapGrowthControlScope no_growth_control;
|
|
CheckIfBackgroundCompilerIsBeingStopped();
|
|
FinalizeCompilation(&assembler, &graph_compiler, flow_graph);
|
|
}
|
|
// TODO(srdjan): Enable this and remove the one from
|
|
// 'BackgroundCompiler::CompileOptimized' once cause of time-outs
|
|
// is resolved.
|
|
// if (isolate()->heap()->NeedsGarbageCollection()) {
|
|
// isolate()->heap()->CollectAllGarbage();
|
|
// }
|
|
}
|
|
}
|
|
// Exit the loop and the function with the correct result value.
|
|
is_compiled = true;
|
|
done = true;
|
|
} else {
|
|
// We bailed out or we encountered an error.
|
|
const Error& error = Error::Handle(thread()->sticky_error());
|
|
|
|
if (error.raw() == Object::branch_offset_error().raw()) {
|
|
// Compilation failed due to an out of range branch offset in the
|
|
// assembler. We try again (done = false) with far branches enabled.
|
|
done = false;
|
|
ASSERT(!use_far_branches);
|
|
use_far_branches = true;
|
|
} else if (error.raw() == Object::speculative_inlining_error().raw()) {
|
|
// Can only happen with precompilation.
|
|
UNREACHABLE();
|
|
} else {
|
|
// If the error isn't due to an out of range branch offset, we don't
|
|
// try again (done = true), and indicate that we did not finish
|
|
// compiling (is_compiled = false).
|
|
if (FLAG_trace_bailout) {
|
|
THR_Print("%s\n", error.ToErrorCString());
|
|
}
|
|
done = true;
|
|
}
|
|
|
|
// If is is not a background compilation, clear the error if it was not a
|
|
// real error, but just a bailout. If we're it a background compilation
|
|
// this will be dealt with in the caller.
|
|
if (!Compiler::IsBackgroundCompilation() && error.IsLanguageError() &&
|
|
(LanguageError::Cast(error).kind() == Report::kBailout)) {
|
|
thread()->clear_sticky_error();
|
|
}
|
|
is_compiled = false;
|
|
}
|
|
// Reset global isolate state.
|
|
thread()->set_deopt_id(prev_deopt_id);
|
|
}
|
|
return is_compiled;
|
|
}
|
|
|
|
|
|
static RawError* CompileFunctionHelper(CompilationPipeline* pipeline,
|
|
const Function& function,
|
|
bool optimized,
|
|
intptr_t osr_id) {
|
|
ASSERT(!FLAG_precompiled_mode);
|
|
ASSERT(!optimized || function.was_compiled());
|
|
LongJumpScope jump;
|
|
if (setjmp(*jump.Set()) == 0) {
|
|
Thread* const thread = Thread::Current();
|
|
Isolate* const isolate = thread->isolate();
|
|
StackZone stack_zone(thread);
|
|
Zone* const zone = stack_zone.GetZone();
|
|
const bool trace_compiler =
|
|
FLAG_trace_compiler || (FLAG_trace_optimizing_compiler && optimized);
|
|
Timer per_compile_timer(trace_compiler, "Compilation time");
|
|
per_compile_timer.Start();
|
|
|
|
ParsedFunction* parsed_function = new (zone)
|
|
ParsedFunction(thread, Function::ZoneHandle(zone, function.raw()));
|
|
if (trace_compiler) {
|
|
const intptr_t token_size =
|
|
function.end_token_pos().Pos() - function.token_pos().Pos();
|
|
THR_Print("Compiling %s%sfunction %s: '%s' @ token %s, size %" Pd "\n",
|
|
(osr_id == Compiler::kNoOSRDeoptId ? "" : "osr "),
|
|
(optimized ? "optimized " : ""),
|
|
(Compiler::IsBackgroundCompilation() ? "(background)" : ""),
|
|
function.ToFullyQualifiedCString(),
|
|
function.token_pos().ToCString(), token_size);
|
|
}
|
|
INC_STAT(thread, num_functions_compiled, 1);
|
|
if (optimized) {
|
|
INC_STAT(thread, num_functions_optimized, 1);
|
|
}
|
|
// Makes sure no classes are loaded during parsing in background.
|
|
const intptr_t loading_invalidation_gen_at_start =
|
|
isolate->loading_invalidation_gen();
|
|
{
|
|
HANDLESCOPE(thread);
|
|
const int64_t num_tokens_before = STAT_VALUE(thread, num_tokens_consumed);
|
|
pipeline->ParseFunction(parsed_function);
|
|
const int64_t num_tokens_after = STAT_VALUE(thread, num_tokens_consumed);
|
|
INC_STAT(thread, num_func_tokens_compiled,
|
|
num_tokens_after - num_tokens_before);
|
|
}
|
|
|
|
CompileParsedFunctionHelper helper(parsed_function, optimized, osr_id);
|
|
|
|
if (Compiler::IsBackgroundCompilation()) {
|
|
if (isolate->IsTopLevelParsing() ||
|
|
(loading_invalidation_gen_at_start !=
|
|
isolate->loading_invalidation_gen())) {
|
|
// Loading occured while parsing. We need to abort here because state
|
|
// changed while compiling.
|
|
Compiler::AbortBackgroundCompilation(
|
|
Thread::kNoDeoptId,
|
|
"Invalidated state during parsing because of script loading");
|
|
}
|
|
}
|
|
|
|
const bool success = helper.Compile(pipeline);
|
|
if (success) {
|
|
if (!optimized) {
|
|
function.set_was_compiled(true);
|
|
}
|
|
} else {
|
|
if (optimized) {
|
|
if (Compiler::IsBackgroundCompilation()) {
|
|
// Try again later, background compilation may abort because of
|
|
// state change during compilation.
|
|
if (FLAG_trace_compiler) {
|
|
THR_Print("Aborted background compilation: %s\n",
|
|
function.ToFullyQualifiedCString());
|
|
}
|
|
{
|
|
// If it was a bailout, then disable optimization.
|
|
Error& error = Error::Handle();
|
|
// We got an error during compilation.
|
|
error = thread->sticky_error();
|
|
thread->clear_sticky_error();
|
|
if ((error.IsLanguageError() &&
|
|
LanguageError::Cast(error).kind() == Report::kBailout) ||
|
|
error.IsUnhandledException()) {
|
|
if (FLAG_trace_compiler) {
|
|
THR_Print("--> disabling optimizations for '%s'\n",
|
|
function.ToFullyQualifiedCString());
|
|
}
|
|
function.SetIsOptimizable(false);
|
|
}
|
|
}
|
|
return Error::null();
|
|
}
|
|
// Optimizer bailed out. Disable optimizations and never try again.
|
|
if (trace_compiler) {
|
|
THR_Print("--> disabling optimizations for '%s'\n",
|
|
function.ToFullyQualifiedCString());
|
|
} else if (FLAG_trace_failed_optimization_attempts) {
|
|
THR_Print("Cannot optimize: %s\n",
|
|
function.ToFullyQualifiedCString());
|
|
}
|
|
function.SetIsOptimizable(false);
|
|
return Error::null();
|
|
} else {
|
|
// Encountered error.
|
|
Error& error = Error::Handle();
|
|
// We got an error during compilation.
|
|
error = thread->sticky_error();
|
|
thread->clear_sticky_error();
|
|
// The non-optimizing compiler can get an unhandled exception
|
|
// due to OOM or Stack overflow errors, it should not however
|
|
// bail out.
|
|
ASSERT(error.IsUnhandledException() ||
|
|
(error.IsLanguageError() &&
|
|
LanguageError::Cast(error).kind() != Report::kBailout));
|
|
return error.raw();
|
|
}
|
|
}
|
|
|
|
per_compile_timer.Stop();
|
|
|
|
if (trace_compiler && success) {
|
|
THR_Print("--> '%s' entry: %#" Px " size: %" Pd " time: %" Pd64 " us\n",
|
|
function.ToFullyQualifiedCString(),
|
|
Code::Handle(function.CurrentCode()).PayloadStart(),
|
|
Code::Handle(function.CurrentCode()).Size(),
|
|
per_compile_timer.TotalElapsedTime());
|
|
}
|
|
|
|
if (FLAG_support_debugger) {
|
|
isolate->debugger()->NotifyCompilation(function);
|
|
}
|
|
|
|
if (FLAG_disassemble && FlowGraphPrinter::ShouldPrint(function)) {
|
|
Disassembler::DisassembleCode(function, optimized);
|
|
} else if (FLAG_disassemble_optimized && optimized &&
|
|
FlowGraphPrinter::ShouldPrint(function)) {
|
|
Disassembler::DisassembleCode(function, true);
|
|
}
|
|
|
|
return Error::null();
|
|
} else {
|
|
Thread* const thread = Thread::Current();
|
|
StackZone stack_zone(thread);
|
|
Error& error = Error::Handle();
|
|
// We got an error during compilation or it is a bailout from background
|
|
// compilation (e.g., during parsing with EnsureIsFinalized).
|
|
error = thread->sticky_error();
|
|
thread->clear_sticky_error();
|
|
if (error.raw() == Object::background_compilation_error().raw()) {
|
|
// Exit compilation, retry it later.
|
|
if (FLAG_trace_bailout) {
|
|
THR_Print("Aborted background compilation: %s\n",
|
|
function.ToFullyQualifiedCString());
|
|
}
|
|
return Error::null();
|
|
}
|
|
// Do not attempt to optimize functions that can cause errors.
|
|
function.set_is_optimizable(false);
|
|
return error.raw();
|
|
}
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
static RawError* ParseFunctionHelper(CompilationPipeline* pipeline,
|
|
const Function& function,
|
|
bool optimized,
|
|
intptr_t osr_id) {
|
|
ASSERT(!FLAG_precompiled_mode);
|
|
ASSERT(!optimized || function.was_compiled());
|
|
LongJumpScope jump;
|
|
if (setjmp(*jump.Set()) == 0) {
|
|
Thread* const thread = Thread::Current();
|
|
StackZone stack_zone(thread);
|
|
Zone* const zone = stack_zone.GetZone();
|
|
const bool trace_compiler =
|
|
FLAG_trace_compiler || (FLAG_trace_optimizing_compiler && optimized);
|
|
|
|
if (trace_compiler) {
|
|
const intptr_t token_size =
|
|
function.end_token_pos().Pos() - function.token_pos().Pos();
|
|
THR_Print("Parsing %s%sfunction %s: '%s' @ token %s, size %" Pd "\n",
|
|
(osr_id == Compiler::kNoOSRDeoptId ? "" : "osr "),
|
|
(optimized ? "optimized " : ""),
|
|
(Compiler::IsBackgroundCompilation() ? "(background)" : ""),
|
|
function.ToFullyQualifiedCString(),
|
|
function.token_pos().ToCString(), token_size);
|
|
}
|
|
ParsedFunction* parsed_function = new (zone)
|
|
ParsedFunction(thread, Function::ZoneHandle(zone, function.raw()));
|
|
pipeline->ParseFunction(parsed_function);
|
|
// For now we just walk thru the AST nodes and in DEBUG mode we print
|
|
// them otherwise just skip through them, this will be need to be
|
|
// wired to generate the IR format.
|
|
#if !defined(PRODUCT)
|
|
#if defined(DEBUG)
|
|
AstPrinter ast_printer(true);
|
|
#else
|
|
AstPrinter ast_printer(false);
|
|
#endif // defined(DEBUG).
|
|
ast_printer.PrintFunctionNodes(*parsed_function);
|
|
#endif // !defined(PRODUCT).
|
|
return Error::null();
|
|
} else {
|
|
Thread* const thread = Thread::Current();
|
|
StackZone stack_zone(thread);
|
|
Error& error = Error::Handle();
|
|
// We got an error during compilation or it is a bailout from background
|
|
// compilation (e.g., during parsing with EnsureIsFinalized).
|
|
error = thread->sticky_error();
|
|
thread->clear_sticky_error();
|
|
// Unoptimized compilation or precompilation may encounter compile-time
|
|
// errors, but regular optimized compilation should not.
|
|
ASSERT(!optimized);
|
|
return error.raw();
|
|
}
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
RawError* Compiler::CompileFunction(Thread* thread, const Function& function) {
|
|
#ifdef DART_PRECOMPILER
|
|
if (FLAG_precompiled_mode) {
|
|
return Precompiler::CompileFunction(
|
|
/* precompiler = */ NULL, thread, thread->zone(), function);
|
|
}
|
|
#endif
|
|
|
|
Isolate* isolate = thread->isolate();
|
|
|
|
#if !defined(PRODUCT)
|
|
VMTagScope tagScope(thread, VMTag::kCompileUnoptimizedTagId);
|
|
TIMELINE_FUNCTION_COMPILATION_DURATION(thread, "CompileFunction", function);
|
|
#endif // !defined(PRODUCT)
|
|
|
|
if (!isolate->compilation_allowed()) {
|
|
FATAL3("Precompilation missed function %s (%s, %s)\n",
|
|
function.ToLibNamePrefixedQualifiedCString(),
|
|
function.token_pos().ToCString(),
|
|
Function::KindToCString(function.kind()));
|
|
}
|
|
|
|
CompilationPipeline* pipeline =
|
|
CompilationPipeline::New(thread->zone(), function);
|
|
|
|
return CompileFunctionHelper(pipeline, function,
|
|
/* optimized = */ false, kNoOSRDeoptId);
|
|
}
|
|
|
|
|
|
RawError* Compiler::ParseFunction(Thread* thread, const Function& function) {
|
|
Isolate* isolate = thread->isolate();
|
|
#if !defined(PRODUCT)
|
|
VMTagScope tagScope(thread, VMTag::kCompileUnoptimizedTagId);
|
|
TIMELINE_FUNCTION_COMPILATION_DURATION(thread, "ParseFunction", function);
|
|
#endif // !defined(PRODUCT)
|
|
|
|
if (!isolate->compilation_allowed()) {
|
|
FATAL3("Precompilation missed function %s (%s, %s)\n",
|
|
function.ToLibNamePrefixedQualifiedCString(),
|
|
function.token_pos().ToCString(),
|
|
Function::KindToCString(function.kind()));
|
|
}
|
|
|
|
CompilationPipeline* pipeline =
|
|
CompilationPipeline::New(thread->zone(), function);
|
|
|
|
return ParseFunctionHelper(pipeline, function,
|
|
/* optimized = */ false, kNoOSRDeoptId);
|
|
}
|
|
|
|
|
|
RawError* Compiler::EnsureUnoptimizedCode(Thread* thread,
|
|
const Function& function) {
|
|
if (function.unoptimized_code() != Object::null()) {
|
|
return Error::null();
|
|
}
|
|
Code& original_code = Code::ZoneHandle(thread->zone());
|
|
if (function.HasCode()) {
|
|
original_code = function.CurrentCode();
|
|
}
|
|
CompilationPipeline* pipeline =
|
|
CompilationPipeline::New(thread->zone(), function);
|
|
const Error& error = Error::Handle(
|
|
CompileFunctionHelper(pipeline, function, false, /* not optimized */
|
|
kNoOSRDeoptId));
|
|
if (!error.IsNull()) {
|
|
return error.raw();
|
|
}
|
|
// Since CompileFunctionHelper replaces the current code, re-attach the
|
|
// the original code if the function was already compiled.
|
|
if (!original_code.IsNull() &&
|
|
(original_code.raw() != function.CurrentCode())) {
|
|
function.AttachCode(original_code);
|
|
}
|
|
ASSERT(function.unoptimized_code() != Object::null());
|
|
if (FLAG_trace_compiler) {
|
|
THR_Print("Ensure unoptimized code for %s\n", function.ToCString());
|
|
}
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
RawError* Compiler::CompileOptimizedFunction(Thread* thread,
|
|
const Function& function,
|
|
intptr_t osr_id) {
|
|
#if !defined(PRODUCT)
|
|
VMTagScope tagScope(thread, VMTag::kCompileOptimizedTagId);
|
|
const char* event_name;
|
|
if (osr_id != kNoOSRDeoptId) {
|
|
event_name = "CompileFunctionOptimizedOSR";
|
|
} else if (IsBackgroundCompilation()) {
|
|
event_name = "CompileFunctionOptimizedBackground";
|
|
} else {
|
|
event_name = "CompileFunctionOptimized";
|
|
}
|
|
TIMELINE_FUNCTION_COMPILATION_DURATION(thread, event_name, function);
|
|
#endif // !defined(PRODUCT)
|
|
|
|
// If we are in the optimizing in the mutator/Dart thread, then
|
|
// this is either an OSR compilation or background compilation is
|
|
// not currently allowed.
|
|
ASSERT(!thread->IsMutatorThread() || (osr_id != kNoOSRDeoptId) ||
|
|
!FLAG_background_compilation || BackgroundCompiler::IsDisabled());
|
|
CompilationPipeline* pipeline =
|
|
CompilationPipeline::New(thread->zone(), function);
|
|
return CompileFunctionHelper(pipeline, function, true, /* optimized */
|
|
osr_id);
|
|
}
|
|
|
|
|
|
// This is only used from unit tests.
|
|
RawError* Compiler::CompileParsedFunction(ParsedFunction* parsed_function) {
|
|
LongJumpScope jump;
|
|
if (setjmp(*jump.Set()) == 0) {
|
|
// Non-optimized code generator.
|
|
DartCompilationPipeline pipeline;
|
|
CompileParsedFunctionHelper helper(parsed_function, false, kNoOSRDeoptId);
|
|
helper.Compile(&pipeline);
|
|
if (FLAG_disassemble) {
|
|
Disassembler::DisassembleCode(parsed_function->function(), false);
|
|
}
|
|
return Error::null();
|
|
} else {
|
|
Error& error = Error::Handle();
|
|
Thread* thread = Thread::Current();
|
|
// We got an error during compilation.
|
|
error = thread->sticky_error();
|
|
thread->clear_sticky_error();
|
|
return error.raw();
|
|
}
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
void Compiler::ComputeLocalVarDescriptors(const Code& code) {
|
|
ASSERT(!code.is_optimized());
|
|
const Function& function = Function::Handle(code.function());
|
|
ParsedFunction* parsed_function = new ParsedFunction(
|
|
Thread::Current(), Function::ZoneHandle(function.raw()));
|
|
ASSERT(code.var_descriptors() == Object::null());
|
|
// IsIrregexpFunction have eager var descriptors generation.
|
|
ASSERT(!function.IsIrregexpFunction());
|
|
// In background compilation, parser can produce 'errors": bailouts
|
|
// if state changed while compiling in background.
|
|
LongJumpScope jump;
|
|
if (setjmp(*jump.Set()) == 0) {
|
|
if (function.kernel_function() == NULL) {
|
|
Parser::ParseFunction(parsed_function);
|
|
parsed_function->AllocateVariables();
|
|
} else {
|
|
parsed_function->EnsureKernelScopes();
|
|
}
|
|
const LocalVarDescriptors& var_descs = LocalVarDescriptors::Handle(
|
|
parsed_function->node_sequence()->scope()->GetVarDescriptors(function));
|
|
ASSERT(!var_descs.IsNull());
|
|
code.set_var_descriptors(var_descs);
|
|
} else {
|
|
// Only possible with background compilation.
|
|
ASSERT(Compiler::IsBackgroundCompilation());
|
|
}
|
|
}
|
|
|
|
|
|
RawError* Compiler::CompileAllFunctions(const Class& cls) {
|
|
Thread* thread = Thread::Current();
|
|
Zone* zone = thread->zone();
|
|
Error& error = Error::Handle(zone);
|
|
Array& functions = Array::Handle(zone, cls.functions());
|
|
Function& func = Function::Handle(zone);
|
|
// Class dynamic lives in the vm isolate. Its array fields cannot be set to
|
|
// an empty array.
|
|
if (functions.IsNull()) {
|
|
ASSERT(cls.IsDynamicClass());
|
|
return error.raw();
|
|
}
|
|
// Compile all the regular functions.
|
|
for (int i = 0; i < functions.Length(); i++) {
|
|
func ^= functions.At(i);
|
|
ASSERT(!func.IsNull());
|
|
if (!func.HasCode() && !func.is_abstract() &&
|
|
!func.IsRedirectingFactory()) {
|
|
if ((cls.is_mixin_app_alias() || cls.IsMixinApplication()) &&
|
|
func.HasOptionalParameters()) {
|
|
// Skipping optional parameters in mixin application.
|
|
continue;
|
|
}
|
|
error = CompileFunction(thread, func);
|
|
if (!error.IsNull()) {
|
|
return error.raw();
|
|
}
|
|
func.ClearICDataArray();
|
|
func.ClearCode();
|
|
}
|
|
}
|
|
return error.raw();
|
|
}
|
|
|
|
|
|
RawError* Compiler::ParseAllFunctions(const Class& cls) {
|
|
Thread* thread = Thread::Current();
|
|
Zone* zone = thread->zone();
|
|
Error& error = Error::Handle(zone);
|
|
Array& functions = Array::Handle(zone, cls.functions());
|
|
Function& func = Function::Handle(zone);
|
|
// Class dynamic lives in the vm isolate. Its array fields cannot be set to
|
|
// an empty array.
|
|
if (functions.IsNull()) {
|
|
ASSERT(cls.IsDynamicClass());
|
|
return error.raw();
|
|
}
|
|
// Compile all the regular functions.
|
|
for (int i = 0; i < functions.Length(); i++) {
|
|
func ^= functions.At(i);
|
|
ASSERT(!func.IsNull());
|
|
if (!func.is_abstract() && !func.IsRedirectingFactory()) {
|
|
if ((cls.is_mixin_app_alias() || cls.IsMixinApplication()) &&
|
|
func.HasOptionalParameters()) {
|
|
// Skipping optional parameters in mixin application.
|
|
continue;
|
|
}
|
|
error = ParseFunction(thread, func);
|
|
if (!error.IsNull()) {
|
|
return error.raw();
|
|
}
|
|
func.ClearICDataArray();
|
|
func.ClearCode();
|
|
}
|
|
}
|
|
return error.raw();
|
|
}
|
|
|
|
|
|
RawObject* Compiler::EvaluateStaticInitializer(const Field& field) {
|
|
#ifdef DART_PRECOMPILER
|
|
if (FLAG_precompiled_mode) {
|
|
return Precompiler::EvaluateStaticInitializer(field);
|
|
}
|
|
#endif
|
|
ASSERT(field.is_static());
|
|
// The VM sets the field's value to transiton_sentinel prior to
|
|
// evaluating the initializer value.
|
|
ASSERT(field.StaticValue() == Object::transition_sentinel().raw());
|
|
LongJumpScope jump;
|
|
if (setjmp(*jump.Set()) == 0) {
|
|
Thread* const thread = Thread::Current();
|
|
NoOOBMessageScope no_msg_scope(thread);
|
|
NoReloadScope no_reload_scope(thread->isolate(), thread);
|
|
// Under lazy compilation initializer has not yet been created, so create
|
|
// it now, but don't bother remembering it because it won't be used again.
|
|
ASSERT(!field.HasPrecompiledInitializer());
|
|
Function& initializer = Function::Handle(thread->zone());
|
|
{
|
|
#if !defined(PRODUCT)
|
|
VMTagScope tagScope(thread, VMTag::kCompileUnoptimizedTagId);
|
|
TimelineDurationScope tds(thread, Timeline::GetCompilerStream(),
|
|
"CompileStaticInitializer");
|
|
if (tds.enabled()) {
|
|
tds.SetNumArguments(1);
|
|
tds.CopyArgument(0, "field", field.ToCString());
|
|
}
|
|
#endif // !defined(PRODUCT)
|
|
|
|
StackZone stack_zone(thread);
|
|
Zone* zone = stack_zone.GetZone();
|
|
ParsedFunction* parsed_function;
|
|
|
|
// Create a one-time-use function to evaluate the initializer and invoke
|
|
// it immediately.
|
|
if (field.kernel_field() != NULL) {
|
|
parsed_function = kernel::ParseStaticFieldInitializer(zone, field);
|
|
} else {
|
|
parsed_function = Parser::ParseStaticFieldInitializer(field);
|
|
parsed_function->AllocateVariables();
|
|
}
|
|
|
|
// Non-optimized code generator.
|
|
DartCompilationPipeline pipeline;
|
|
CompileParsedFunctionHelper helper(parsed_function, false, kNoOSRDeoptId);
|
|
helper.Compile(&pipeline);
|
|
initializer = parsed_function->function().raw();
|
|
Code::Handle(initializer.unoptimized_code())
|
|
.set_var_descriptors(Object::empty_var_descriptors());
|
|
}
|
|
// Invoke the function to evaluate the expression.
|
|
return DartEntry::InvokeFunction(initializer, Object::empty_array());
|
|
} else {
|
|
Thread* const thread = Thread::Current();
|
|
StackZone zone(thread);
|
|
const Error& error = Error::Handle(thread->zone(), thread->sticky_error());
|
|
thread->clear_sticky_error();
|
|
return error.raw();
|
|
}
|
|
UNREACHABLE();
|
|
return Object::null();
|
|
}
|
|
|
|
|
|
RawObject* Compiler::ExecuteOnce(SequenceNode* fragment) {
|
|
#ifdef DART_PRECOMPILER
|
|
if (FLAG_precompiled_mode) {
|
|
return Precompiler::ExecuteOnce(fragment);
|
|
}
|
|
#endif
|
|
LongJumpScope jump;
|
|
if (setjmp(*jump.Set()) == 0) {
|
|
Thread* const thread = Thread::Current();
|
|
|
|
// Don't allow message interrupts while executing constant
|
|
// expressions. They can cause bogus recursive compilation.
|
|
NoOOBMessageScope no_msg_scope(thread);
|
|
|
|
// Don't allow reload requests to come in.
|
|
NoReloadScope no_reload_scope(thread->isolate(), thread);
|
|
|
|
if (FLAG_trace_compiler) {
|
|
THR_Print("compiling expression: ");
|
|
if (FLAG_support_ast_printer) {
|
|
AstPrinter ast_printer;
|
|
ast_printer.PrintNode(fragment);
|
|
}
|
|
}
|
|
|
|
// Create a dummy function object for the code generator.
|
|
// The function needs to be associated with a named Class: the interface
|
|
// Function fits the bill.
|
|
const char* kEvalConst = "eval_const";
|
|
const Function& func = Function::ZoneHandle(Function::New(
|
|
String::Handle(Symbols::New(thread, kEvalConst)),
|
|
RawFunction::kRegularFunction,
|
|
true, // static function
|
|
false, // not const function
|
|
false, // not abstract
|
|
false, // not external
|
|
false, // not native
|
|
Class::Handle(Type::Handle(Type::DartFunctionType()).type_class()),
|
|
fragment->token_pos()));
|
|
|
|
func.set_result_type(Object::dynamic_type());
|
|
func.set_num_fixed_parameters(0);
|
|
func.SetNumOptionalParameters(0, true);
|
|
// Manually generated AST, do not recompile.
|
|
func.SetIsOptimizable(false);
|
|
func.set_is_debuggable(false);
|
|
|
|
// We compile the function here, even though InvokeFunction() below
|
|
// would compile func automatically. We are checking fewer invariants
|
|
// here.
|
|
ParsedFunction* parsed_function = new ParsedFunction(thread, func);
|
|
parsed_function->SetNodeSequence(fragment);
|
|
fragment->scope()->AddVariable(parsed_function->EnsureExpressionTemp());
|
|
fragment->scope()->AddVariable(parsed_function->current_context_var());
|
|
parsed_function->AllocateVariables();
|
|
|
|
// Non-optimized code generator.
|
|
DartCompilationPipeline pipeline;
|
|
CompileParsedFunctionHelper helper(parsed_function, false, kNoOSRDeoptId);
|
|
helper.Compile(&pipeline);
|
|
Code::Handle(func.unoptimized_code())
|
|
.set_var_descriptors(Object::empty_var_descriptors());
|
|
|
|
const Object& result = PassiveObject::Handle(
|
|
DartEntry::InvokeFunction(func, Object::empty_array()));
|
|
return result.raw();
|
|
} else {
|
|
Thread* const thread = Thread::Current();
|
|
const Object& result = PassiveObject::Handle(thread->sticky_error());
|
|
thread->clear_sticky_error();
|
|
return result.raw();
|
|
}
|
|
UNREACHABLE();
|
|
return Object::null();
|
|
}
|
|
|
|
|
|
void Compiler::AbortBackgroundCompilation(intptr_t deopt_id, const char* msg) {
|
|
if (FLAG_trace_compiler) {
|
|
THR_Print("ABORT background compilation: %s\n", msg);
|
|
}
|
|
#if !defined(PRODUCT)
|
|
TimelineStream* stream = Timeline::GetCompilerStream();
|
|
ASSERT(stream != NULL);
|
|
TimelineEvent* event = stream->StartEvent();
|
|
if (event != NULL) {
|
|
event->Instant("AbortBackgroundCompilation");
|
|
event->SetNumArguments(1);
|
|
event->CopyArgument(0, "reason", msg);
|
|
event->Complete();
|
|
}
|
|
#endif // !defined(PRODUCT)
|
|
ASSERT(Compiler::IsBackgroundCompilation());
|
|
Thread::Current()->long_jump_base()->Jump(
|
|
deopt_id, Object::background_compilation_error());
|
|
}
|
|
|
|
|
|
// C-heap allocated background compilation queue element.
|
|
class QueueElement {
|
|
public:
|
|
explicit QueueElement(const Function& function)
|
|
: next_(NULL), function_(function.raw()) {}
|
|
|
|
virtual ~QueueElement() {
|
|
next_ = NULL;
|
|
function_ = Function::null();
|
|
}
|
|
|
|
RawFunction* Function() const { return function_; }
|
|
|
|
|
|
void set_next(QueueElement* elem) { next_ = elem; }
|
|
QueueElement* next() const { return next_; }
|
|
|
|
RawObject* function() const { return function_; }
|
|
RawObject** function_ptr() {
|
|
return reinterpret_cast<RawObject**>(&function_);
|
|
}
|
|
|
|
private:
|
|
QueueElement* next_;
|
|
RawFunction* function_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(QueueElement);
|
|
};
|
|
|
|
|
|
// Allocated in C-heap. Handles both input and output of background compilation.
|
|
// It implements a FIFO queue, using Peek, Add, Remove operations.
|
|
class BackgroundCompilationQueue {
|
|
public:
|
|
BackgroundCompilationQueue() : first_(NULL), last_(NULL) {}
|
|
virtual ~BackgroundCompilationQueue() { Clear(); }
|
|
|
|
void VisitObjectPointers(ObjectPointerVisitor* visitor) {
|
|
ASSERT(visitor != NULL);
|
|
QueueElement* p = first_;
|
|
while (p != NULL) {
|
|
visitor->VisitPointer(p->function_ptr());
|
|
p = p->next();
|
|
}
|
|
}
|
|
|
|
bool IsEmpty() const { return first_ == NULL; }
|
|
|
|
void Add(QueueElement* value) {
|
|
ASSERT(value != NULL);
|
|
ASSERT(value->next() == NULL);
|
|
if (first_ == NULL) {
|
|
first_ = value;
|
|
ASSERT(last_ == NULL);
|
|
} else {
|
|
ASSERT(last_ != NULL);
|
|
last_->set_next(value);
|
|
}
|
|
last_ = value;
|
|
ASSERT(first_ != NULL && last_ != NULL);
|
|
}
|
|
|
|
QueueElement* Peek() const { return first_; }
|
|
|
|
RawFunction* PeekFunction() const {
|
|
QueueElement* e = Peek();
|
|
if (e == NULL) {
|
|
return Function::null();
|
|
} else {
|
|
return e->Function();
|
|
}
|
|
}
|
|
|
|
QueueElement* Remove() {
|
|
ASSERT(first_ != NULL);
|
|
QueueElement* result = first_;
|
|
first_ = first_->next();
|
|
if (first_ == NULL) {
|
|
last_ = NULL;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
bool ContainsObj(const Object& obj) const {
|
|
QueueElement* p = first_;
|
|
while (p != NULL) {
|
|
if (p->function() == obj.raw()) {
|
|
return true;
|
|
}
|
|
p = p->next();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void Clear() {
|
|
while (!IsEmpty()) {
|
|
QueueElement* e = Remove();
|
|
delete e;
|
|
}
|
|
ASSERT((first_ == NULL) && (last_ == NULL));
|
|
}
|
|
|
|
private:
|
|
QueueElement* first_;
|
|
QueueElement* last_;
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(BackgroundCompilationQueue);
|
|
};
|
|
|
|
|
|
BackgroundCompiler::BackgroundCompiler(Isolate* isolate)
|
|
: isolate_(isolate),
|
|
running_(true),
|
|
done_(new bool()),
|
|
queue_monitor_(new Monitor()),
|
|
done_monitor_(new Monitor()),
|
|
function_queue_(new BackgroundCompilationQueue()) {
|
|
*done_ = false;
|
|
}
|
|
|
|
|
|
// Fields all deleted in ::Stop; here clear them.
|
|
BackgroundCompiler::~BackgroundCompiler() {
|
|
isolate_ = NULL;
|
|
running_ = false;
|
|
done_ = NULL;
|
|
queue_monitor_ = NULL;
|
|
done_monitor_ = NULL;
|
|
function_queue_ = NULL;
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::Run() {
|
|
while (running_) {
|
|
// Maybe something is already in the queue, check first before waiting
|
|
// to be notified.
|
|
bool result = Thread::EnterIsolateAsHelper(isolate_, Thread::kCompilerTask);
|
|
ASSERT(result);
|
|
{
|
|
Thread* thread = Thread::Current();
|
|
StackZone stack_zone(thread);
|
|
Zone* zone = stack_zone.GetZone();
|
|
HANDLESCOPE(thread);
|
|
Function& function = Function::Handle(zone);
|
|
{
|
|
MonitorLocker ml(queue_monitor_);
|
|
function = function_queue()->PeekFunction();
|
|
}
|
|
while (running_ && !function.IsNull() && !isolate_->IsTopLevelParsing()) {
|
|
// Check that we have aggregated and cleared the stats.
|
|
ASSERT(thread->compiler_stats()->IsCleared());
|
|
Compiler::CompileOptimizedFunction(thread, function,
|
|
Compiler::kNoOSRDeoptId);
|
|
#ifndef PRODUCT
|
|
Isolate* isolate = thread->isolate();
|
|
isolate->aggregate_compiler_stats()->Add(*thread->compiler_stats());
|
|
thread->compiler_stats()->Clear();
|
|
#endif // PRODUCT
|
|
|
|
QueueElement* qelem = NULL;
|
|
{
|
|
MonitorLocker ml(queue_monitor_);
|
|
if (function_queue()->IsEmpty()) {
|
|
// We are shutting down, queue was cleared.
|
|
function = Function::null();
|
|
} else {
|
|
qelem = function_queue()->Remove();
|
|
const Function& old = Function::Handle(qelem->Function());
|
|
if ((!old.HasOptimizedCode() && old.IsOptimizable()) ||
|
|
FLAG_stress_test_background_compilation) {
|
|
if (Compiler::CanOptimizeFunction(thread, old)) {
|
|
QueueElement* repeat_qelem = new QueueElement(old);
|
|
function_queue()->Add(repeat_qelem);
|
|
}
|
|
}
|
|
function = function_queue()->PeekFunction();
|
|
}
|
|
}
|
|
if (qelem != NULL) {
|
|
delete qelem;
|
|
}
|
|
}
|
|
}
|
|
Thread::ExitIsolateAsHelper();
|
|
{
|
|
// Wait to be notified when the work queue is not empty.
|
|
MonitorLocker ml(queue_monitor_);
|
|
while ((function_queue()->IsEmpty() || isolate_->IsTopLevelParsing()) &&
|
|
running_) {
|
|
ml.Wait();
|
|
}
|
|
}
|
|
} // while running
|
|
|
|
{
|
|
// Notify that the thread is done.
|
|
MonitorLocker ml_done(done_monitor_);
|
|
*done_ = true;
|
|
ml_done.Notify();
|
|
}
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::CompileOptimized(const Function& function) {
|
|
ASSERT(Thread::Current()->IsMutatorThread());
|
|
// TODO(srdjan): Checking different strategy for collecting garbage
|
|
// accumulated by background compiler.
|
|
if (isolate_->heap()->NeedsGarbageCollection()) {
|
|
isolate_->heap()->CollectAllGarbage();
|
|
}
|
|
{
|
|
MonitorLocker ml(queue_monitor_);
|
|
ASSERT(running_);
|
|
if (function_queue()->ContainsObj(function)) {
|
|
return;
|
|
}
|
|
QueueElement* elem = new QueueElement(function);
|
|
function_queue()->Add(elem);
|
|
ml.Notify();
|
|
}
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::VisitPointers(ObjectPointerVisitor* visitor) {
|
|
function_queue_->VisitObjectPointers(visitor);
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::Stop(Isolate* isolate) {
|
|
BackgroundCompiler* task = isolate->background_compiler();
|
|
if (task == NULL) {
|
|
// Nothing to stop.
|
|
return;
|
|
}
|
|
BackgroundCompilationQueue* function_queue = task->function_queue();
|
|
|
|
Monitor* queue_monitor = task->queue_monitor_;
|
|
Monitor* done_monitor = task->done_monitor_;
|
|
bool* task_done = task->done_;
|
|
// Wake up compiler task and stop it.
|
|
{
|
|
MonitorLocker ml(queue_monitor);
|
|
task->running_ = false;
|
|
function_queue->Clear();
|
|
// 'task' will be deleted by thread pool.
|
|
task = NULL;
|
|
ml.Notify(); // Stop waiting for the queue.
|
|
}
|
|
|
|
{
|
|
MonitorLocker ml_done(done_monitor);
|
|
while (!(*task_done)) {
|
|
ml_done.WaitWithSafepointCheck(Thread::Current());
|
|
}
|
|
}
|
|
delete task_done;
|
|
delete done_monitor;
|
|
delete queue_monitor;
|
|
delete function_queue;
|
|
isolate->set_background_compiler(NULL);
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::Disable() {
|
|
Thread* thread = Thread::Current();
|
|
ASSERT(thread != NULL);
|
|
Isolate* isolate = thread->isolate();
|
|
MutexLocker ml(isolate->mutex());
|
|
BackgroundCompiler* task = isolate->background_compiler();
|
|
if (task != NULL) {
|
|
// We should only ever have to stop the task if this is the first call to
|
|
// Disable.
|
|
ASSERT(!isolate->is_background_compiler_disabled());
|
|
BackgroundCompiler::Stop(isolate);
|
|
}
|
|
ASSERT(isolate->background_compiler() == NULL);
|
|
isolate->disable_background_compiler();
|
|
}
|
|
|
|
|
|
bool BackgroundCompiler::IsDisabled() {
|
|
Thread* thread = Thread::Current();
|
|
ASSERT(thread != NULL);
|
|
Isolate* isolate = thread->isolate();
|
|
MutexLocker ml(isolate->mutex());
|
|
return isolate->is_background_compiler_disabled();
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::Enable() {
|
|
Thread* thread = Thread::Current();
|
|
ASSERT(thread != NULL);
|
|
Isolate* isolate = thread->isolate();
|
|
MutexLocker ml(isolate->mutex());
|
|
isolate->enable_background_compiler();
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::EnsureInit(Thread* thread) {
|
|
ASSERT(thread->IsMutatorThread());
|
|
// Finalize NoSuchMethodError, _Mint; occasionally needed in optimized
|
|
// compilation.
|
|
Class& cls = Class::Handle(
|
|
thread->zone(), Library::LookupCoreClass(Symbols::NoSuchMethodError()));
|
|
ASSERT(!cls.IsNull());
|
|
Error& error = Error::Handle(thread->zone(), cls.EnsureIsFinalized(thread));
|
|
ASSERT(error.IsNull());
|
|
cls = Library::LookupCoreClass(Symbols::_Mint());
|
|
ASSERT(!cls.IsNull());
|
|
error = cls.EnsureIsFinalized(thread);
|
|
ASSERT(error.IsNull());
|
|
|
|
bool start_task = false;
|
|
Isolate* isolate = thread->isolate();
|
|
{
|
|
MutexLocker ml(isolate->mutex());
|
|
if (isolate->background_compiler() == NULL) {
|
|
BackgroundCompiler* task = new BackgroundCompiler(isolate);
|
|
isolate->set_background_compiler(task);
|
|
start_task = true;
|
|
}
|
|
}
|
|
if (start_task) {
|
|
Dart::thread_pool()->Run(isolate->background_compiler());
|
|
}
|
|
}
|
|
|
|
|
|
#else // DART_PRECOMPILED_RUNTIME
|
|
|
|
|
|
bool UseKernelFrontEndFor(ParsedFunction* parsed_function) {
|
|
UNREACHABLE();
|
|
return false;
|
|
}
|
|
|
|
|
|
CompilationPipeline* CompilationPipeline::New(Zone* zone,
|
|
const Function& function) {
|
|
UNREACHABLE();
|
|
return NULL;
|
|
}
|
|
|
|
|
|
DEFINE_RUNTIME_ENTRY(CompileFunction, 1) {
|
|
const Function& function = Function::CheckedHandle(arguments.ArgAt(0));
|
|
FATAL3("Precompilation missed function %s (%" Pd ", %s)\n",
|
|
function.ToLibNamePrefixedQualifiedCString(),
|
|
function.token_pos().value(),
|
|
Function::KindToCString(function.kind()));
|
|
}
|
|
|
|
|
|
bool Compiler::IsBackgroundCompilation() {
|
|
return false;
|
|
}
|
|
|
|
|
|
bool Compiler::CanOptimizeFunction(Thread* thread, const Function& function) {
|
|
UNREACHABLE();
|
|
return false;
|
|
}
|
|
|
|
|
|
RawError* Compiler::Compile(const Library& library, const Script& script) {
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
RawError* Compiler::CompileClass(const Class& cls) {
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
RawError* Compiler::CompileFunction(Thread* thread, const Function& function) {
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
RawError* Compiler::ParseFunction(Thread* thread, const Function& function) {
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
RawError* Compiler::EnsureUnoptimizedCode(Thread* thread,
|
|
const Function& function) {
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
RawError* Compiler::CompileOptimizedFunction(Thread* thread,
|
|
const Function& function,
|
|
intptr_t osr_id) {
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
RawError* Compiler::CompileParsedFunction(ParsedFunction* parsed_function) {
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
void Compiler::ComputeLocalVarDescriptors(const Code& code) {
|
|
UNREACHABLE();
|
|
}
|
|
|
|
|
|
RawError* Compiler::CompileAllFunctions(const Class& cls) {
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
RawError* Compiler::ParseAllFunctions(const Class& cls) {
|
|
UNREACHABLE();
|
|
return Error::null();
|
|
}
|
|
|
|
|
|
RawObject* Compiler::EvaluateStaticInitializer(const Field& field) {
|
|
ASSERT(field.HasPrecompiledInitializer());
|
|
const Function& initializer =
|
|
Function::Handle(field.PrecompiledInitializer());
|
|
return DartEntry::InvokeFunction(initializer, Object::empty_array());
|
|
}
|
|
|
|
|
|
RawObject* Compiler::ExecuteOnce(SequenceNode* fragment) {
|
|
UNREACHABLE();
|
|
return Object::null();
|
|
}
|
|
|
|
|
|
void Compiler::AbortBackgroundCompilation(intptr_t deopt_id, const char* msg) {
|
|
UNREACHABLE();
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::CompileOptimized(const Function& function) {
|
|
UNREACHABLE();
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::VisitPointers(ObjectPointerVisitor* visitor) {
|
|
UNREACHABLE();
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::Stop(Isolate* isolate) {
|
|
UNREACHABLE();
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::EnsureInit(Thread* thread) {
|
|
UNREACHABLE();
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::Disable() {
|
|
UNREACHABLE();
|
|
}
|
|
|
|
|
|
void BackgroundCompiler::Enable() {
|
|
UNREACHABLE();
|
|
}
|
|
|
|
|
|
bool BackgroundCompiler::IsDisabled() {
|
|
UNREACHABLE();
|
|
return true;
|
|
}
|
|
|
|
#endif // DART_PRECOMPILED_RUNTIME
|
|
|
|
} // namespace dart
|