Adding a type vector to replace type cells.

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index ec6ad32dc0eb11128755db7c333094611f985dfe..17fef564badea41c2377a6b07d15a06786762bdc 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -118,6 +118,9 @@ void FullCodeGenerator::Generate() {
   CompilationInfo* info = info_;
   handler_table_ =
       isolate()->factory()->NewFixedArray(function()->handler_count(), TENURED);
+
+  InitializeFeedbackVector();
+
   profiling_counter_ = isolate()->factory()->NewCell(
       Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate()));
   SetFunctionPosition(function());
@@ -1021,6 +1024,8 @@ void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
 
 void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   Comment cmnt(masm_, "[ ForInStatement");
+  int slot = stmt->ForInFeedbackSlot();
+
   SetStatementPosition(stmt);
 
   Label loop, exit;
@@ -1099,13 +1104,15 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   Label non_proxy;
   __ bind(&fixed_array);
 
-  Handle<Cell> cell = isolate()->factory()->NewCell(
-      Handle<Object>(Smi::FromInt(TypeFeedbackCells::kForInFastCaseMarker),
-                     isolate()));
-  RecordTypeFeedbackCell(stmt->ForInFeedbackId(), cell);
-  __ LoadHeapObject(ebx, cell);
-  __ mov(FieldOperand(ebx, Cell::kValueOffset),
-         Immediate(Smi::FromInt(TypeFeedbackCells::kForInSlowCaseMarker)));
+  Handle<Object> feedback = Handle<Object>(
+      Smi::FromInt(TypeFeedbackInfo::kForInFastCaseMarker),
+      isolate());
+  StoreFeedbackVectorSlot(slot, feedback);
+
+  // No need for a write barrier, we are storing a Smi in the feedback vector.
+  __ LoadHeapObject(ebx, FeedbackVector());
+  __ mov(FieldOperand(ebx, FixedArray::OffsetOfElementAt(slot)),
+         Immediate(Smi::FromInt(TypeFeedbackInfo::kForInSlowCaseMarker)));
 
   __ mov(ebx, Immediate(Smi::FromInt(1)));  // Smi indicates slow check
   __ mov(ecx, Operand(esp, 0 * kPointerSize));  // Get enumerated object
@@ -2628,10 +2635,10 @@ void FullCodeGenerator::EmitCallWithStub(Call* expr) {
   SetSourcePosition(expr->position());
 
   Handle<Object> uninitialized =
-      TypeFeedbackCells::UninitializedSentinel(isolate());
-  Handle<Cell> cell = isolate()->factory()->NewCell(uninitialized);
-  RecordTypeFeedbackCell(expr->CallFeedbackId(), cell);
-  __ mov(ebx, cell);
+      TypeFeedbackInfo::UninitializedSentinel(isolate());
+  StoreFeedbackVectorSlot(expr->CallFeedbackSlot(), uninitialized);
+  __ LoadHeapObject(ebx, FeedbackVector());
+  __ mov(edx, Immediate(Smi::FromInt(expr->CallFeedbackSlot())));
 
   // Record call targets in unoptimized code.
   CallFunctionStub stub(arg_count, RECORD_CALL_TARGET);
@@ -2812,10 +2819,10 @@ void FullCodeGenerator::VisitCallNew(CallNew* expr) {
 
   // Record call targets in unoptimized code.
   Handle<Object> uninitialized =
-      TypeFeedbackCells::UninitializedSentinel(isolate());
-  Handle<Cell> cell = isolate()->factory()->NewCell(uninitialized);
-  RecordTypeFeedbackCell(expr->CallNewFeedbackId(), cell);
-  __ mov(ebx, cell);
+      TypeFeedbackInfo::UninitializedSentinel(isolate());
+  StoreFeedbackVectorSlot(expr->CallNewFeedbackSlot(), uninitialized);
+  __ LoadHeapObject(ebx, FeedbackVector());
+  __ mov(edx, Immediate(Smi::FromInt(expr->CallNewFeedbackSlot())));
 
   CallConstructStub stub(RECORD_CALL_TARGET);
   __ call(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL);