Remove unused HIsNumberAndBranch instruction.

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 1929 matching lines @@
   int false_block = instr->FalseDestination(chunk_);
   __ j(cc, chunk_->GetAssemblyLabel(false_block));
 }
 
 
 void LCodeGen::DoDebugBreak(LDebugBreak* instr) {
   __ int3();
 }
 
 
-void LCodeGen::DoIsNumberAndBranch(LIsNumberAndBranch* instr) {
-  Representation r = instr->hydrogen()->value()->representation();
-  if (r.IsSmiOrInteger32() || r.IsDouble()) {
-    EmitBranch(instr, no_condition);
-  } else {
-    ASSERT(r.IsTagged());
-    Register reg = ToRegister(instr->value());
-    HType type = instr->hydrogen()->value()->type();
-    if (type.IsTaggedNumber()) {
-      EmitBranch(instr, no_condition);
-    }
-    __ JumpIfSmi(reg, instr->TrueLabel(chunk_));
-    __ CompareRoot(FieldOperand(reg, HeapObject::kMapOffset),
-                   Heap::kHeapNumberMapRootIndex);
-    EmitBranch(instr, equal);
-  }
-}
-
-
 void LCodeGen::DoBranch(LBranch* instr) {
   Representation r = instr->hydrogen()->value()->representation();
   if (r.IsInteger32()) {
     ASSERT(!info()->IsStub());
     Register reg = ToRegister(instr->value());
     __ testl(reg, reg);
     EmitBranch(instr, not_zero);
   } else if (r.IsSmi()) {
     ASSERT(!info()->IsStub());
     Register reg = ToRegister(instr->value());
@@ skipping 3541 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64