Don't add code dependencies on transitioning stores eagerly.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index e1dce514e3768e4425d1714dae66d58ef2801e7a..63925aa501a7984f81d778536c1554dda55bee94 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -86,7 +86,6 @@ void LCodeGen::FinishCode(Handle<Code> code) {
   if (!info()->IsStub()) {
     Deoptimizer::EnsureRelocSpaceForLazyDeoptimization(code);
   }
-  info()->CommitDependencies(code);
 }
 
 
@@ -4344,7 +4343,7 @@ void LCodeGen::DoInnerAllocatedObject(LInnerAllocatedObject* instr) {
 
 
 void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
-  Representation representation = instr->representation();
+  Representation representation = instr->hydrogen()->field_representation();
 
   HObjectAccess access = instr->hydrogen()->access();
   int offset = access.offset();
@@ -4366,7 +4365,6 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
   }
 
   Register object = ToRegister(instr->object());
-  Handle<Map> transition = instr->transition();
   SmiCheck check_needed =
       instr->hydrogen()->value()->IsHeapObject()
           ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
@@ -4391,8 +4389,8 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
       }
     }
   } 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);
@@ -4405,7 +4403,8 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
     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 {