Avoid HeapObject check in HStoreNamedField.

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 3960 matching lines @@
       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());
-  SmiCheck check_needed =
-      instr->hydrogen()->value()->IsHeapObject()
-          ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
+  __ AssertNotSmi(object);
 
-  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(!representation.IsSmi() ||
+         !instr->value()->IsConstantOperand() ||
+         IsSmi(LConstantOperand::cast(instr->value())));
+  if (representation.IsDouble()) {
     ASSERT(access.IsInobject());
     ASSERT(!instr->hydrogen()->has_transition());
     ASSERT(!instr->hydrogen()->NeedsWriteBarrier());
     XMMRegister value = ToDoubleRegister(instr->value());
     __ movsd(FieldOperand(object, offset), value);
     return;
   }
 
   if (instr->hydrogen()->has_transition()) {
     Handle<Map> transition = instr->hydrogen()->transition_map();
@@ skipping 46 matching lines @@
   if (instr->hydrogen()->NeedsWriteBarrier()) {
     Register value = ToRegister(instr->value());
     Register temp = access.IsInobject() ? ToRegister(instr->temp()) : object;
     // Update the write barrier for the object for in-object properties.
     __ RecordWriteField(write_register,
                         offset,
                         value,
                         temp,
                         kSaveFPRegs,
                         EMIT_REMEMBERED_SET,
-                        check_needed);
+                        instr->hydrogen()->SmiCheckForWriteBarrier());
   }
 }
 
 
 void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) {
   ASSERT(ToRegister(instr->context()).is(esi));
   ASSERT(ToRegister(instr->object()).is(edx));
   ASSERT(ToRegister(instr->value()).is(eax));
 
   __ mov(ecx, instr->name());
@@ skipping 1594 matching lines @@
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32