Revert r9901 to make tree green again.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
===================================================================
--- src/x64/lithium-x64.cc	(revision 9901)
+++ src/x64/lithium-x64.cc	(working copy)
@@ -230,13 +230,6 @@
 }
 
 
-void LIsStringAndBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("if is_string(");
-  InputAt(0)->PrintTo(stream);
-  stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
-}
-
-
 void LIsSmiAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_smi(");
   InputAt(0)->PrintTo(stream);
@@ -251,14 +244,6 @@
 }
 
 
-void LStringCompareAndBranch::PrintDataTo(StringStream* stream) {
-  stream->Add("if compare_generic(");
-  InputAt(0)->PrintTo(stream);
-  InputAt(1)->PrintTo(stream);
-  stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
-}
-
-
 void LHasInstanceTypeAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if has_instance_type(");
   InputAt(0)->PrintTo(stream);
@@ -1407,7 +1392,7 @@
   LOperand* left = UseFixed(instr->left(), rdx);
   LOperand* right = UseFixed(instr->right(), rax);
   LCmpT* result = new LCmpT(left, right);
-  return AssignEnvironment(MarkAsCall(DefineFixed(result, rax), instr));
+  return MarkAsCall(DefineFixed(result, rax), instr);
 }
 
 
@@ -1465,12 +1450,6 @@
 }
 
 
-LInstruction* LChunkBuilder::DoIsStringAndBranch(HIsStringAndBranch* instr) {
-  ASSERT(instr->value()->representation().IsTagged());
-  return new LIsStringAndBranch(UseRegisterAtStart(instr->value()));
-}
-
-
 LInstruction* LChunkBuilder::DoIsSmiAndBranch(HIsSmiAndBranch* instr) {
   ASSERT(instr->value()->representation().IsTagged());
   return new LIsSmiAndBranch(Use(instr->value()));
@@ -1485,19 +1464,6 @@
 }
 
 
-LInstruction* LChunkBuilder::DoStringCompareAndBranch(
-    HStringCompareAndBranch* instr) {
-
-  ASSERT(instr->left()->representation().IsTagged());
-  ASSERT(instr->right()->representation().IsTagged());
-  LOperand* left = UseFixed(instr->left(), rdx);
-  LOperand* right = UseFixed(instr->right(), rax);
-  LStringCompareAndBranch* result = new LStringCompareAndBranch(left, right);
-
-  return MarkAsCall(result, instr);
-}
-
-
 LInstruction* LChunkBuilder::DoHasInstanceTypeAndBranch(
     HHasInstanceTypeAndBranch* instr) {
   ASSERT(instr->value()->representation().IsTagged());