Separated smi check from HBoundsCheck.

src/x64/lithium-codegen-x64.cc

 // Copyright 2013 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 3906 matching lines @@
   ASSERT(ToRegister(instr->value()).is(rax));
 
   __ Move(rcx, instr->hydrogen()->name());
   Handle<Code> ic = (instr->strict_mode_flag() == kStrictMode)
       ? isolate()->builtins()->StoreIC_Initialize_Strict()
       : isolate()->builtins()->StoreIC_Initialize();
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
 }
 
 
-void LCodeGen::DeoptIfTaggedButNotSmi(LEnvironment* environment,
-                                      HValue* value,
-                                      LOperand* operand) {
-  if (value->representation().IsTagged() && !value->type().IsSmi()) {
-    Condition cc;
-    if (operand->IsRegister()) {
-      cc = masm()->CheckSmi(ToRegister(operand));
-    } else {
-      cc = masm()->CheckSmi(ToOperand(operand));
-    }
-    DeoptimizeIf(NegateCondition(cc), environment);
-  }
-}
-
-
 void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) {
-  DeoptIfTaggedButNotSmi(instr->environment(),
-                         instr->hydrogen()->length(),
-                         instr->length());
-  DeoptIfTaggedButNotSmi(instr->environment(),
-                         instr->hydrogen()->index(),
-                         instr->index());
+  if (instr->hydrogen()->skip_check()) return;
+
   if (instr->length()->IsRegister()) {
     Register reg = ToRegister(instr->length());
     if (!instr->hydrogen()->length()->representation().IsTagged()) {
       __ AssertZeroExtended(reg);
     }
     if (instr->index()->IsConstantOperand()) {
       int constant_index =
           ToInteger32(LConstantOperand::cast(instr->index()));
       if (instr->hydrogen()->length()->representation().IsTagged()) {
         __ Cmp(reg, Smi::FromInt(constant_index));
@@ skipping 1783 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64