Support declarations of context allocated locals in Crankshaft.

src/x64/full-codegen-x64.cc

Index: src/x64/full-codegen-x64.cc
===================================================================
--- src/x64/full-codegen-x64.cc	(revision 9109)
+++ src/x64/full-codegen-x64.cc	(working copy)
@@ -659,10 +659,11 @@
 }
 
 
-void FullCodeGenerator::EmitDeclaration(Variable* variable,
+void FullCodeGenerator::EmitDeclaration(VariableProxy* proxy,
                                         Variable::Mode mode,
                                         FunctionLiteral* function) {
   Comment cmnt(masm_, "[ Declaration");
+  Variable* variable = proxy->var();
   ASSERT(variable != NULL);  // Must have been resolved.
   Slot* slot = variable->AsSlot();
   ASSERT(slot != NULL);
@@ -699,10 +700,12 @@
         int offset = Context::SlotOffset(slot->index());
         __ movq(rbx, rsi);
         __ RecordWrite(rbx, offset, result_register(), rcx);
+        PrepareForBailoutForId(proxy->id(), NO_REGISTERS);
       } else if (mode == Variable::CONST || mode == Variable::LET) {
         __ LoadRoot(kScratchRegister, Heap::kTheHoleValueRootIndex);
         __ movq(ContextOperand(rsi, slot->index()), kScratchRegister);
         // No write barrier since the hole value is in old space.
+        PrepareForBailoutForId(proxy->id(), NO_REGISTERS);
       }
       break;
 
@@ -734,7 +737,7 @@
 
 
 void FullCodeGenerator::VisitDeclaration(Declaration* decl) {
-  EmitDeclaration(decl->proxy()->var(), decl->mode(), decl->fun());
+  EmitDeclaration(decl->proxy(), decl->mode(), decl->fun());
 }