Don't add code dependencies on transitioning stores eagerly.

src/ia32/lithium-codegen-ia32.cc

 // Copyright 2012 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 "v8.h"
 
 #if V8_TARGET_ARCH_IA32
 
 #include "ia32/lithium-codegen-ia32.h"
 #include "ic.h"
@@ skipping 68 matching lines @@
 
 void LCodeGen::FinishCode(Handle<Code> code) {
   ASSERT(is_done());
   code->set_stack_slots(GetStackSlotCount());
   code->set_safepoint_table_offset(safepoints_.GetCodeOffset());
   if (code->is_optimized_code()) RegisterWeakObjectsInOptimizedCode(code);
   PopulateDeoptimizationData(code);
   if (!info()->IsStub()) {
     Deoptimizer::EnsureRelocSpaceForLazyDeoptimization(code);
   }
-  info()->CommitDependencies(code);
 }
 
 
 void LCodeGen::Abort(BailoutReason reason) {
   info()->set_bailout_reason(reason);
   status_ = ABORTED;
 }
 
 
 #ifdef _MSC_VER
@@ skipping 4237 matching lines @@
     LConstantOperand* offset = LConstantOperand::cast(instr->offset());
     __ lea(result, Operand(base, ToInteger32(offset)));
   } else {
     Register offset = ToRegister(instr->offset());
     __ lea(result, Operand(base, offset, times_1, 0));
   }
 }
 
 
 void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
-  Representation representation = instr->representation();
+  Representation representation = instr->hydrogen()->field_representation();
 
   HObjectAccess access = instr->hydrogen()->access();
   int offset = access.offset();
 
   if (access.IsExternalMemory()) {
     ASSERT(!instr->hydrogen()->NeedsWriteBarrier());
     MemOperand operand = instr->object()->IsConstantOperand()
         ? MemOperand::StaticVariable(
             ToExternalReference(LConstantOperand::cast(instr->object())))
         : MemOperand(ToRegister(instr->object()), offset);
     if (instr->value()->IsConstantOperand()) {
       LConstantOperand* operand_value = LConstantOperand::cast(instr->value());
       __ mov(operand, Immediate(ToInteger32(operand_value)));
     } else {
       Register value = ToRegister(instr->value());
       __ Store(value, operand, representation);
     }
     return;
   }
 
   Register object = ToRegister(instr->object());
-  Handle<Map> transition = instr->transition();
   SmiCheck check_needed =
       instr->hydrogen()->value()->IsHeapObject()
           ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
 
   ASSERT(!(representation.IsSmi() &&
            instr->value()->IsConstantOperand() &&
            !IsSmi(LConstantOperand::cast(instr->value()))));
   if (representation.IsHeapObject()) {
     if (instr->value()->IsConstantOperand()) {
       LConstantOperand* operand_value = LConstantOperand::cast(instr->value());
       if (chunk_->LookupConstant(operand_value)->HasSmiValue()) {
         DeoptimizeIf(no_condition, instr->environment());
       }
     } else {
       if (!instr->hydrogen()->value()->type().IsHeapObject()) {
         Register value = ToRegister(instr->value());
         __ test(value, Immediate(kSmiTagMask));
         DeoptimizeIf(zero, instr->environment());
 
         // We know now that value is not a smi, so we can omit the check below.
         check_needed = OMIT_SMI_CHECK;
       }
     }
   } else if (representation.IsDouble()) {
-    ASSERT(transition.is_null());
     ASSERT(access.IsInobject());
+    ASSERT(!instr->hydrogen()->has_transition());
     ASSERT(!instr->hydrogen()->NeedsWriteBarrier());
     if (CpuFeatures::IsSupported(SSE2)) {
       CpuFeatureScope scope(masm(), SSE2);
       XMMRegister value = ToDoubleRegister(instr->value());
       __ movsd(FieldOperand(object, offset), value);
     } else {
       X87Register value = ToX87Register(instr->value());
       X87Mov(FieldOperand(object, offset), value);
     }
     return;
   }
 
-  if (!transition.is_null()) {
+  if (instr->hydrogen()->has_transition()) {
+    Handle<Map> transition = instr->hydrogen()->transition_map();
     if (!instr->hydrogen()->NeedsWriteBarrierForMap()) {
       __ mov(FieldOperand(object, HeapObject::kMapOffset), transition);
     } else {
       Register temp = ToRegister(instr->temp());
       Register temp_map = ToRegister(instr->temp_map());
       __ mov(temp_map, transition);
       __ mov(FieldOperand(object, HeapObject::kMapOffset), temp_map);
       // Update the write barrier for the map field.
       __ RecordWriteField(object,
                           HeapObject::kMapOffset,
@@ skipping 2005 matching lines @@
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32