Remove redundant hydrogen- and lithium instruction for symbol comparison.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
===================================================================
--- src/arm/lithium-codegen-arm.cc	(revision 8347)
+++ src/arm/lithium-codegen-arm.cc	(working copy)
@@ -1714,7 +1714,7 @@
 }
 
 
-void LCodeGen::DoCmpJSObjectEq(LCmpJSObjectEq* instr) {
+void LCodeGen::DoCmpObjectEq(LCmpObjectEq* instr) {
   Register left = ToRegister(instr->InputAt(0));
   Register right = ToRegister(instr->InputAt(1));
   Register result = ToRegister(instr->result());
@@ -1725,7 +1725,7 @@
 }
 
 
-void LCodeGen::DoCmpJSObjectEqAndBranch(LCmpJSObjectEqAndBranch* instr) {
+void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) {
   Register left = ToRegister(instr->InputAt(0));
   Register right = ToRegister(instr->InputAt(1));
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -1736,28 +1736,6 @@
 }
 
 
-void LCodeGen::DoCmpSymbolEq(LCmpSymbolEq* instr) {
-  Register left = ToRegister(instr->InputAt(0));
-  Register right = ToRegister(instr->InputAt(1));
-  Register result = ToRegister(instr->result());
-
-  __ cmp(left, Operand(right));
-  __ LoadRoot(result, Heap::kTrueValueRootIndex, eq);
-  __ LoadRoot(result, Heap::kFalseValueRootIndex, ne);
-}
-
-
-void LCodeGen::DoCmpSymbolEqAndBranch(LCmpSymbolEqAndBranch* instr) {
-  Register left = ToRegister(instr->InputAt(0));
-  Register right = ToRegister(instr->InputAt(1));
-  int false_block = chunk_->LookupDestination(instr->false_block_id());
-  int true_block = chunk_->LookupDestination(instr->true_block_id());
-
-  __ cmp(left, Operand(right));
-  EmitBranch(true_block, false_block, eq);
-}
-
-
 void LCodeGen::DoCmpConstantEq(LCmpConstantEq* instr) {
   Register left = ToRegister(instr->InputAt(0));
   Register result = ToRegister(instr->result());