Convert UnaryOpStub to a HydrogenCodeStub

src/ia32/lithium-ia32.cc

 // 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 1560 matching lines @@
     if (instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
       temp = TempRegister();
     }
     LMulI* mul = new(zone()) LMulI(left, right, temp);
     if (instr->CheckFlag(HValue::kCanOverflow) ||
         instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
       AssignEnvironment(mul);
     }
     return DefineSameAsFirst(mul);
   } else if (instr->representation().IsDouble()) {
-    return DoArithmeticD(Token::MUL, instr);
+    if (CpuFeatures::IsSafeForSnapshot(SSE2)) {
+      return DoArithmeticD(Token::MUL, instr);
+    }
+    ASSERT(instr->right()->IsConstant() &&
+           static_cast<HConstant*>(instr->right())->DoubleValue() == -1);
+    // TODO(olivf) This is currently just a hack to support the UnaryOp Minus
+    // Stub. This will go away once we can use more than one X87 register,
+    // thus fully support binary instructions without SSE2.
+    LOperand* left = UseX87TopOfStack(instr->left());
+    LNegateNoSSE2D* result = new(zone()) LNegateNoSSE2D(left);
+    return DefineX87TOS(result);
   } else {
     ASSERT(instr->representation().IsSmiOrTagged());
     return DoArithmeticT(Token::MUL, instr);
   }
 }
 
 
 LInstruction* LChunkBuilder::DoSub(HSub* instr) {
   if (instr->representation().IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());
@@ skipping 439 matching lines @@
   return NULL;
 }
 
 
 LInstruction* LChunkBuilder::DoCheckHeapObject(HCheckHeapObject* instr) {
   LOperand* value = UseAtStart(instr->value());
   return AssignEnvironment(new(zone()) LCheckNonSmi(value));
 }
 
 
+LInstruction* LChunkBuilder::DoCheckSmi(HCheckSmi* instr) {
+  LOperand* value = UseRegisterAtStart(instr->value());
+  return AssignEnvironment(new(zone()) LCheckSmi(value));
+}
+
+
+LInstruction* LChunkBuilder::DoIsNumberAndBranch(HIsNumberAndBranch* instr) {
+  return new(zone())
+    LIsNumberAndBranch(UseRegisterOrConstantAtStart(instr->value()));
+}
+
+
 LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
   LOperand* value = UseRegisterAtStart(instr->value());
   LOperand* temp = TempRegister();
   LCheckInstanceType* result = new(zone()) LCheckInstanceType(value, temp);
   return AssignEnvironment(result);
 }
 
 
 LInstruction* LChunkBuilder::DoCheckPrototypeMaps(HCheckPrototypeMaps* instr) {
   LUnallocated* temp = TempRegister();
@@ skipping 731 matching lines @@
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseTempRegister(instr->index());
   return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index));
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32