Revert r20476.

Reason for revert: crashes arm64.debug cctest

Fatal error in ../src/hydrogen-instructions.h, line 2968
CHECK(value->IsCheckHeapObject()) failed

Fixed environment assignment for LCheckNonSmi.

TBR=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/223873003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20484 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/lithium-arm.cc

@@ -1963,9 +1963,7 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
 
 LInstruction* LChunkBuilder::DoCheckHeapObject(HCheckHeapObject* instr) {
   LOperand* value = UseRegisterAtStart(instr->value());
-  LInstruction* result = new(zone()) LCheckNonSmi(value);
-  if (!instr->value()->IsHeapObject()) result = AssignEnvironment(result);
-  return result;
+  return AssignEnvironment(new(zone()) LCheckNonSmi(value));
 }
 
 

src/arm64/lithium-arm64.cc

@@ -1171,9 +1171,7 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
 
 LInstruction* LChunkBuilder::DoCheckValue(HCheckValue* instr) {
   LOperand* value = UseRegisterAtStart(instr->value());
-  LInstruction* result = new(zone()) LCheckNonSmi(value);
-  if (!instr->value()->IsHeapObject()) result = AssignEnvironment(result);
-  return result;
+  return AssignEnvironment(new(zone()) LCheckValue(value));
 }
 
 

src/ia32/lithium-ia32.cc

@@ -2007,9 +2007,7 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
 
 LInstruction* LChunkBuilder::DoCheckHeapObject(HCheckHeapObject* instr) {
   LOperand* value = UseAtStart(instr->value());
-  LInstruction* result = new(zone()) LCheckNonSmi(value);
-  if (!instr->value()->IsHeapObject()) result = AssignEnvironment(result);
-  return result;
+  return AssignEnvironment(new(zone()) LCheckNonSmi(value));
 }
 
 

src/x64/lithium-x64.cc

@@ -1925,9 +1925,7 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
 
 LInstruction* LChunkBuilder::DoCheckHeapObject(HCheckHeapObject* instr) {
   LOperand* value = UseRegisterAtStart(instr->value());
-  LInstruction* result = new(zone()) LCheckNonSmi(value);
-  if (!instr->value()->IsHeapObject()) result = AssignEnvironment(result);
-  return result;
+  return AssignEnvironment(new(zone()) LCheckNonSmi(value));
 }