Write buffer based write barrier for IA32 and Crankshaft. Currently...

src/ia32/ic-ia32.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 246 matching lines @@
   __ test(Operand(elements, r0, times_4, kDetailsOffset - kHeapObjectTag),
           Immediate(kTypeAndReadOnlyMask));
   __ j(not_zero, miss_label, not_taken);
 
   // Store the value at the masked, scaled index.
   const int kValueOffset = kElementsStartOffset + kPointerSize;
   __ lea(r0, Operand(elements, r0, times_4, kValueOffset - kHeapObjectTag));
   __ mov(Operand(r0, 0), value);
 
   // Update write barrier. Make sure not to clobber the value.
-#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
   __ mov(r1, value);
-  __ RecordWrite(elements, r0, r1);
-#endif
+  __ RecordWrite(elements, r0, r1, kDontSaveFPRegs);
 }
 
 
 static void GenerateNumberDictionaryLoad(MacroAssembler* masm,
                                          Label* miss,
                                          Register elements,
                                          Register key,
                                          Register r0,
                                          Register r1,
                                          Register r2,
@@ skipping 739 matching lines @@
   __ j(above_equal, &extra, not_taken);
 
   // Fast case: Do the store.
   __ bind(&fast);
   // eax: value
   // ecx: key (a smi)
   // edx: receiver
   // edi: FixedArray receiver->elements
   __ mov(CodeGenerator::FixedArrayElementOperand(edi, ecx), eax);
 
-#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
   // Update write barrier for the elements array address.
   __ mov(edx, Operand(eax));
-  __ RecordWrite(edi, 0, edx, ecx);
-#endif
+  __ RecordWrite(edi, 0, edx, ecx, kDontSaveFPRegs);
   __ ret(0);
 }
 
 
 void KeyedStoreIC::GenerateExternalArray(MacroAssembler* masm,
                                          ExternalArrayType array_type) {
   // ----------- S t a t e -------------
   //  -- eax    : value
   //  -- ecx    : key
   //  -- edx    : receiver
@@ skipping 1071 matching lines @@
   Condition cc = *jmp_address == Assembler::kJncShortOpcode
       ? not_zero
       : zero;
   *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32