X87: Emit memory operands for cmp and test on ia32 and x64 when it makes sense.

src/x87/assembler-x87.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 653 matching lines @@
   void cmpb(Register reg, const Operand& op);
   void cmpb(const Operand& op, Register reg);
   void cmpb_al(const Operand& op);
   void cmpw_ax(const Operand& op);
   void cmpw(const Operand& op, Immediate imm16);
   void cmp(Register reg, int32_t imm32);
   void cmp(Register reg, Handle<Object> handle);
   void cmp(Register reg0, Register reg1) { cmp(reg0, Operand(reg1)); }
   void cmp(Register reg, const Operand& op);
   void cmp(Register reg, const Immediate& imm) { cmp(Operand(reg), imm); }
+  void cmp(const Operand& op, Register reg);
   void cmp(const Operand& op, const Immediate& imm);
   void cmp(const Operand& op, Handle<Object> handle);
 
   void dec_b(Register dst);
   void dec_b(const Operand& dst);
 
   void dec(Register dst);
   void dec(const Operand& dst);
 
   void cdq();
@@ skipping 392 matching lines @@
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X87_ASSEMBLER_X87_H_