Revert "Convert UnaryOpStub to a HydrogenCodeStub"

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index 2c3b74ff68746a1eb8f3b6d1ca770c904bf0aba9..de43f86a3d2b6e154d7535d5719b0114a0149531 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -1834,12 +1834,12 @@ int LCodeGen::GetNextEmittedBlock() const {
 
 template<class InstrType>
 void LCodeGen::EmitBranch(InstrType instr, Condition cc) {
-  int left_block = instr->TrueDestination(chunk_);
   int right_block = instr->FalseDestination(chunk_);
+  int left_block = instr->TrueDestination(chunk_);
 
   int next_block = GetNextEmittedBlock();
 
-  if (right_block == left_block || cc == no_condition) {
+  if (right_block == left_block) {
     EmitGoto(left_block);
   } else if (left_block == next_block) {
     __ j(NegateCondition(cc), chunk_->GetAssemblyLabel(right_block));
@@ -1859,25 +1859,6 @@ void LCodeGen::DoDebugBreak(LDebugBreak* instr) {
 }
 
 
-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()) {