Turn on background compilation

runtime/vm/compiler.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 88 matching lines @@
 
 void DartCompilationPipeline::FinalizeCompilation() { }
 
 
 void IrregexpCompilationPipeline::ParseFunction(
     ParsedFunction* parsed_function) {
   RegExpParser::ParseFunction(parsed_function);
   // Variables are allocated after compilation.
 }
 
+
 FlowGraph* IrregexpCompilationPipeline::BuildFlowGraph(
     Zone* zone,
     ParsedFunction* parsed_function,
     const ZoneGrowableArray<const ICData*>& ic_data_array,
     intptr_t osr_id) {
   // Compile to the dart IR.
   RegExpEngine::CompilationResult result =
       RegExpEngine::CompileIR(parsed_function->regexp_compile_data(),
                               parsed_function,
                               ic_data_array);
   backtrack_goto_ = result.backtrack_goto;
 
   // Allocate variables now that we know the number of locals.
   parsed_function->AllocateIrregexpVariables(result.num_stack_locals);
 
   // Build the flow graph.
   FlowGraphBuilder builder(*parsed_function,
                            ic_data_array,
                            NULL,  // NULL = not inlining.
                            osr_id);
 
   return new(zone) FlowGraph(*parsed_function,
                              result.graph_entry,
                              result.num_blocks);
 }
 
+
 void IrregexpCompilationPipeline::FinalizeCompilation() {
   backtrack_goto_->ComputeOffsetTable();
 }
 
+
 CompilationPipeline* CompilationPipeline::New(Zone* zone,
                                               const Function& function) {
   if (function.IsIrregexpFunction()) {
     return new(zone) IrregexpCompilationPipeline();
   } else {
     return new(zone) DartCompilationPipeline();
   }
 }
 
 
@@ skipping 1135 matching lines @@
 
 RawError* Compiler::CompileOptimizedFunction(Thread* thread,
                                              const Function& function,
                                              intptr_t osr_id) {
   VMTagScope tagScope(thread, VMTag::kCompileOptimizedTagId);
   TIMELINE_FUNCTION_COMPILATION_DURATION(thread,
                                          "OptimizedFunction", function);
 
   // Optimization must happen in non-mutator/Dart thread if background
   // compilation is on. OSR compilation still occurs in the main thread.
+  // TODO(Srdjan): Remove assert allowance for regular expression functions
+  // once they can be compiled in background.
   ASSERT((osr_id != kNoOSRDeoptId) || !FLAG_background_compilation ||
-         !thread->IsMutatorThread());
+         !thread->IsMutatorThread() ||
+         function.IsIrregexpFunction());
   CompilationPipeline* pipeline =
       CompilationPipeline::New(thread->zone(), function);
   return CompileFunctionHelper(pipeline,
                                function,
                                true,  /* optimized */
                                osr_id);
 }
 
 
 // This is only used from unit tests.
@@ skipping 552 matching lines @@
 }
 
 
 void BackgroundCompiler::EnsureInit(Thread* thread) {
   UNREACHABLE();
 }
 
 #endif  // DART_PRECOMPILED_RUNTIME
 
 }  // namespace dart