Add X87 implementations for Integer32ToDouble, DoubleToI, DoubleToSmi

src/ia32/lithium-ia32.h

 // Copyright 2012 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 259 matching lines @@
   virtual void SetDeferredLazyDeoptimizationEnvironment(LEnvironment* env) { }
 
   void MarkAsCall() { bit_field_ = IsCallBits::update(bit_field_, true); }
   bool IsCall() const { return IsCallBits::decode(bit_field_); }
 
   // Interface to the register allocator and iterators.
   bool ClobbersTemps() const { return IsCall(); }
   bool ClobbersRegisters() const { return IsCall(); }
   virtual bool ClobbersDoubleRegisters() const {
     return IsCall() ||
-      (!CpuFeatures::IsSupported(SSE2) &&
-       // We only have rudimentary X87Stack tracking, thus in general
-       // cannot handle deoptimization nor phi-nodes.
-       (HasEnvironment() || IsControl()));
+           // We only have rudimentary X87Stack tracking, thus in general
+           // cannot handle phi-nodes.
+           (!CpuFeatures::IsSafeForSnapshot(SSE2) && IsControl());
   }
 
   virtual bool HasResult() const = 0;
   virtual LOperand* result() const = 0;
 
   bool HasDoubleRegisterResult();
   bool HasDoubleRegisterInput();
   bool IsDoubleInput(X87Register reg, LCodeGen* cgen);
 
   LOperand* FirstInput() { return InputAt(0); }
@@ skipping 1241 matching lines @@
   DECLARE_HYDROGEN_ACCESSOR(Return)
 };
 
 
 class LLoadNamedField V8_FINAL : public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LLoadNamedField(LOperand* object) {
     inputs_[0] = object;
   }
 
-  virtual bool ClobbersDoubleRegisters() const {
-    return !CpuFeatures::IsSupported(SSE2) &&
-        !hydrogen()->representation().IsDouble();
-  }
-
   LOperand* object() { return inputs_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(LoadNamedField, "load-named-field")
   DECLARE_HYDROGEN_ACCESSOR(LoadNamedField)
 };
 
 
 class LLoadNamedGeneric V8_FINAL : public LTemplateInstruction<1, 2, 0> {
  public:
   LLoadNamedGeneric(LOperand* context, LOperand* object) {
@@ skipping 639 matching lines @@
 class LNumberUntagD V8_FINAL : public LTemplateInstruction<1, 1, 1> {
  public:
   explicit LNumberUntagD(LOperand* value, LOperand* temp) {
     inputs_[0] = value;
     temps_[0] = temp;
   }
 
   LOperand* value() { return inputs_[0]; }
   LOperand* temp() { return temps_[0]; }
 
-  virtual bool ClobbersDoubleRegisters() const V8_OVERRIDE { return false; }
-
   DECLARE_CONCRETE_INSTRUCTION(NumberUntagD, "double-untag")
   DECLARE_HYDROGEN_ACCESSOR(Change);
 };
 
 
 class LSmiUntag V8_FINAL : public LTemplateInstruction<1, 1, 0> {
  public:
   LSmiUntag(LOperand* value, bool needs_check)
       : needs_check_(needs_check) {
     inputs_[0] = value;
@@ skipping 697 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_LITHIUM_IA32_H_