Fix SmiCompare on 64 bit to distinguish between comparisons where...

src/x64/macro-assembler-x64.h

 // Copyright 2011 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 260 matching lines @@
                                              Register src,
                                              int power);
 
   // Divide a positive smi's integer value by a power of two.
   // Provides result as 32-bit integer value.
   void PositiveSmiDivPowerOfTwoToInteger32(Register dst,
                                            Register src,
                                            int power);
 
 
-  // Simple comparison of smis.
-  void SmiCompare(Register dst, Register src);
+  // Simple comparison of smis.  Both sides must be known smis to use these,
+  // otherwise use Cmp.
+  void SmiCompare(Register smi1, Register smi2);
   void SmiCompare(Register dst, Smi* src);
   void SmiCompare(Register dst, const Operand& src);
   void SmiCompare(const Operand& dst, Register src);
   void SmiCompare(const Operand& dst, Smi* src);
   // Compare the int32 in src register to the value of the smi stored at dst.
   void SmiCompareInteger32(const Operand& dst, Register src);
   // Sets sign and zero flags depending on value of smi in register.
   void SmiTest(Register src);
 
   // Functions performing a check on a known or potential smi. Returns
@@ skipping 309 matching lines @@
   void Set(const Operand& dst, int64_t x);
 
   // Move if the registers are not identical.
   void Move(Register target, Register source);
 
   // Handle support
   void Move(Register dst, Handle<Object> source);
   void Move(const Operand& dst, Handle<Object> source);
   void Cmp(Register dst, Handle<Object> source);
   void Cmp(const Operand& dst, Handle<Object> source);
+  void Cmp(Register dst, Smi* src);
+  void Cmp(const Operand& dst, Smi* src);
   void Push(Handle<Object> source);
 
   // Emit code to discard a non-negative number of pointer-sized elements
   // from the stack, clobbering only the rsp register.
   void Drop(int stack_elements);
 
   void Call(Label* target) { call(target); }
 
   // Control Flow
   void Jump(Address destination, RelocInfo::Mode rmode);
@@ skipping 73 matching lines @@
   void FCmp();
 
   // Abort execution if argument is not a number. Used in debug code.
   void AbortIfNotNumber(Register object);
 
   // Abort execution if argument is a smi. Used in debug code.
   void AbortIfSmi(Register object);
 
   // Abort execution if argument is not a smi. Used in debug code.
   void AbortIfNotSmi(Register object);
+  void AbortIfNotSmi(const Operand& object);
 
   // Abort execution if argument is a string. Used in debug code.
   void AbortIfNotString(Register object);
 
   // Abort execution if argument is not the root value with the given index.
   void AbortIfNotRootValue(Register src,
                            Heap::RootListIndex root_value_index,
                            const char* message);
 
   // ---------------------------------------------------------------------------
@@ skipping 1168 matching lines @@
       Jump(adaptor, RelocInfo::CODE_TARGET);
     }
     bind(&invoke);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_