introduce LTaggedToSmi

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 147 matching lines @@
   V(StoreKeyed)                                 \
   V(StoreKeyedGeneric)                          \
   V(StoreNamedField)                            \
   V(StoreNamedGeneric)                          \
   V(StringAdd)                                  \
   V(StringCharCodeAt)                           \
   V(StringCharFromCode)                         \
   V(StringCompareAndBranch)                     \
   V(SubI)                                       \
   V(TaggedToI)                                  \
+  V(TaggedToSmi)                                \
   V(ThisFunction)                               \
   V(ToFastProperties)                           \
   V(TransitionElementsKind)                     \
   V(TrapAllocationMemento)                      \
   V(Typeof)                                     \
   V(TypeofIsAndBranch)                          \
   V(Uint32ToDouble)                             \
   V(Uint32ToSmi)                                \
   V(UnknownOSRValue)                            \
   V(WrapReceiver)
@@ skipping 1808 matching lines @@
 class LDoubleToSmi V8_FINAL : public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LDoubleToSmi(LOperand* value) {
     inputs_[0] = value;
   }
 
   LOperand* value() { return inputs_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(DoubleToSmi, "double-to-smi")
   DECLARE_HYDROGEN_ACCESSOR(UnaryOperation)
+
+  bool truncating() { return hydrogen()->CanTruncateToSmi(); }
 };
 
 
 // Truncating conversion from a tagged value to an int32.
 class LTaggedToI V8_FINAL : public LTemplateInstruction<1, 1, 1> {
  public:
   LTaggedToI(LOperand* value, LOperand* temp) {
     inputs_[0] = value;
     temps_[0] = temp;
   }
 
   LOperand* value() { return inputs_[0]; }
   LOperand* temp() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(TaggedToI, "tagged-to-i")
   DECLARE_HYDROGEN_ACCESSOR(Change)
 
   bool truncating() { return hydrogen()->CanTruncateToInt32(); }
 };
 
 
+class LTaggedToSmi V8_FINAL : public LTemplateInstruction<1, 1, 1> {
+ public:
+  LTaggedToSmi(LOperand* value, LOperand* temp) {
+    inputs_[0] = value;
+    temps_[0] = temp;
+  }
+
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(TaggedToSmi, "tagged-to-smi")
+  DECLARE_HYDROGEN_ACCESSOR(Change)
+
+  bool truncating() { return hydrogen()->CanTruncateToSmi(); }
+};
+
+
 class LSmiTag V8_FINAL : public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LSmiTag(LOperand* value) {
     inputs_[0] = value;
   }
 
   LOperand* value() { return inputs_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(SmiTag, "smi-tag")
 };
@@ skipping 714 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_LITHIUM_IA32_H_