Fixed environment handling for LFlooringDivI on ARM.

src/arm/lithium-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <sstream>
 
 #include "src/v8.h"
 
 #include "src/arm/lithium-codegen-arm.h"
 #include "src/hydrogen-osr.h"
@@ skipping 1379 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoFlooringDivI(HMathFloorOfDiv* instr) {
   DCHECK(instr->representation().IsSmiOrInteger32());
   DCHECK(instr->left()->representation().Equals(instr->representation()));
   DCHECK(instr->right()->representation().Equals(instr->representation()));
   LOperand* dividend = UseRegister(instr->left());
   LOperand* divisor = UseRegister(instr->right());
   LOperand* temp =
       CpuFeatures::IsSupported(SUDIV) ? NULL : TempDoubleRegister();
-  LFlooringDivI* div = new(zone()) LFlooringDivI(dividend, divisor, temp);
-  return AssignEnvironment(DefineAsRegister(div));
+  LInstruction* result =
+      DefineAsRegister(new (zone()) LFlooringDivI(dividend, divisor, temp));
+  if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
+      instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
+      (instr->CheckFlag(HValue::kCanOverflow) &&
+       (!CpuFeatures::IsSupported(SUDIV) ||
+        !instr->CheckFlag(HValue::kAllUsesTruncatingToInt32)))) {
+    result = AssignEnvironment(result);
+  }
+  return result;
 }
 
 
 LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) {
   if (instr->RightIsPowerOf2()) {
     return DoFlooringDivByPowerOf2I(instr);
   } else if (instr->right()->IsConstant()) {
     return DoFlooringDivByConstI(instr);
   } else {
     return DoFlooringDivI(instr);
@@ skipping 1219 matching lines @@
 LInstruction* LChunkBuilder::DoAllocateBlockContext(
     HAllocateBlockContext* instr) {
   LOperand* context = UseFixed(instr->context(), cp);
   LOperand* function = UseRegisterAtStart(instr->function());
   LAllocateBlockContext* result =
       new(zone()) LAllocateBlockContext(context, function);
   return MarkAsCall(DefineFixed(result, cp), instr);
 }
 
 } }  // namespace v8::internal