Reapply r4686: Complete version of full codegen for x64....

src/x64/macro-assembler-x64.cc

 // Copyright 2009 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 784 matching lines @@
   } else {
     movq(dst, src1);
     subq(dst, src2);
     j(overflow, on_not_smi_result);
   }
 }
 
 
 void MacroAssembler::SmiSub(Register dst,
                             Register src1,
-                            Operand const& src2,
+                            const Operand& src2,
                             Label* on_not_smi_result) {
   if (on_not_smi_result == NULL) {
     // No overflow checking. Use only when it's known that
     // overflowing is impossible (e.g., subtracting two positive smis).
     if (dst.is(src1)) {
       subq(dst, src2);
     } else {
       movq(dst, src1);
       subq(dst, src2);
     }
@@ skipping 97 matching lines @@
 
     Move(kScratchRegister, constant);
     addq(dst, kScratchRegister);
   } else {
     Move(dst, constant);
     addq(dst, src);
   }
 }
 
 
+void MacroAssembler::SmiAddConstant(const Operand& dst, Smi* constant) {
+  if (constant->value() != 0) {
+    Move(kScratchRegister, constant);
+    addq(dst, kScratchRegister);
+  }
+}
+
+
 void MacroAssembler::SmiAddConstant(Register dst,
                                     Register src,
                                     Smi* constant,
                                     Label* on_not_smi_result) {
   if (constant->value() == 0) {
     if (!dst.is(src)) {
       movq(dst, src);
     }
   } else if (dst.is(src)) {
     ASSERT(!dst.is(kScratchRegister));
@@ skipping 1828 matching lines @@
   CPU::FlushICache(address_, size_);
 
   // Check that the code was patched as expected.
   ASSERT(masm_.pc_ == address_ + size_);
   ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64