Remove unused SmiTryAddConstant from X64 macro assembler

src/x64/macro-assembler-x64.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 1429 matching lines @@
 
 void MacroAssembler::JumpUnlessBothNonNegativeSmi(Register src1,
                                                   Register src2,
                                                   Label* on_not_both_smi,
                                                   Label::Distance near_jump) {
   Condition both_smi = CheckBothNonNegativeSmi(src1, src2);
   j(NegateCondition(both_smi), on_not_both_smi, near_jump);
 }
 
 
-void MacroAssembler::SmiTryAddConstant(Register dst,
-                                       Register src,
-                                       Smi* constant,
-                                       Label* on_not_smi_result,
-                                       Label::Distance near_jump) {
-  // Does not assume that src is a smi.
-  ASSERT_EQ(static_cast<int>(1), static_cast<int>(kSmiTagMask));
-  STATIC_ASSERT(kSmiTag == 0);
-  ASSERT(!dst.is(kScratchRegister));
-  ASSERT(!src.is(kScratchRegister));
-
-  JumpIfNotSmi(src, on_not_smi_result, near_jump);
-  Register tmp = (dst.is(src) ? kScratchRegister : dst);
-  LoadSmiConstant(tmp, constant);
-  addq(tmp, src);
-  j(overflow, on_not_smi_result, near_jump);
-  if (dst.is(src)) {
-    movq(dst, tmp);
-  }
-}
-
-
 void MacroAssembler::SmiAddConstant(Register dst, Register src, Smi* constant) {
   if (constant->value() == 0) {
     if (!dst.is(src)) {
       movq(dst, src);
     }
     return;
   } else if (dst.is(src)) {
     ASSERT(!dst.is(kScratchRegister));
     switch (constant->value()) {
       case 1:
@@ skipping 3445 matching lines @@
   j(greater, &no_memento_available);
   CompareRoot(MemOperand(scratch_reg, -AllocationMemento::kSize),
               Heap::kAllocationMementoMapRootIndex);
   bind(&no_memento_available);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64