[turbofan] Add support for deferred code.

src/compiler/code-generator.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/pipeline.h"
 
@@ skipping 26 matching lines @@
 
   // Place function entry hook if requested to do so.
   if (linkage()->GetIncomingDescriptor()->IsJSFunctionCall()) {
     ProfileEntryHookStub::MaybeCallEntryHook(masm());
   }
 
   // Architecture-specific, linkage-specific prologue.
   info->set_prologue_offset(masm()->pc_offset());
   AssemblePrologue();
 
-  // Assemble all instructions.
-  for (InstructionSequence::const_iterator i = code()->begin();
-       i != code()->end(); ++i) {
-    AssembleInstruction(*i);
+  // Assemble all non-deferred instructions.
+  for (auto const block : code()->instruction_blocks()) {
+    if (block->IsDeferred()) continue;
+    for (int i = block->code_start(); i < block->code_end(); ++i) {
+      AssembleInstruction(code()->InstructionAt(i));
+    }
+  }
+
+  // Assemble all deferred instructions.
+  for (auto const block : code()->instruction_blocks()) {
+    if (!block->IsDeferred()) continue;
+    for (int i = block->code_start(); i < block->code_end(); ++i) {
+      AssembleInstruction(code()->InstructionAt(i));
+    }
   }
 
   FinishCode(masm());
 
   // Ensure there is space for lazy deopt.
   if (!info->IsStub()) {
     int target_offset = masm()->pc_offset() + Deoptimizer::patch_size();
     while (masm()->pc_offset() < target_offset) {
       masm()->nop();
     }
@@ skipping 15 matching lines @@
   PopulateDeoptimizationData(result);
 
   // Emit a code line info recording stop event.
   void* line_info = recorder->DetachJITHandlerData();
   LOG_CODE_EVENT(isolate(), CodeEndLinePosInfoRecordEvent(*result, line_info));
 
   return result;
 }
 
 
+bool CodeGenerator::IsNextInAssemblyOrder(BasicBlock::RpoNumber block) const {
+  return code()->InstructionBlockAt(current_block_)->ao_number().IsNext(
+      code()->InstructionBlockAt(block)->ao_number());
+}
+
+
 void CodeGenerator::RecordSafepoint(PointerMap* pointers, Safepoint::Kind kind,
                                     int arguments,
                                     Safepoint::DeoptMode deopt_mode) {
   const ZoneList<InstructionOperand*>* operands =
       pointers->GetNormalizedOperands();
   Safepoint safepoint =
       safepoints()->DefineSafepoint(masm(), kind, arguments, deopt_mode);
   for (int i = 0; i < operands->length(); i++) {
     InstructionOperand* pointer = operands->at(i);
     if (pointer->IsStackSlot()) {
@@ skipping 412 matching lines @@
 }
 
 
 void CodeGenerator::AddNopForSmiCodeInlining() { UNIMPLEMENTED(); }
 
 #endif  // !V8_TURBOFAN_BACKEND
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8