Improved modulo operation in lithium as well as bailout on -0....

src/arm/lithium-arm.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 505 matching lines @@
 
 
 class LArgumentsElements: public LTemplateInstruction<1, 0, 0> {
  public:
   LArgumentsElements() { }
 
   DECLARE_CONCRETE_INSTRUCTION(ArgumentsElements, "arguments-elements")
 };
 
 
-class LModI: public LTemplateInstruction<1, 2, 0> {
+class LModI: public LTemplateInstruction<1, 2, 3> {
  public:
-  LModI(LOperand* left, LOperand* right) {
+  // Used when the right hand is a constant power of 2.
+  LModI(LOperand* left,
+        LOperand* right) {
     inputs_[0] = left;
     inputs_[1] = right;
+    temps_[0] = NULL;
+    temps_[1] = NULL;
+    temps_[2] = NULL;
+  }
+
+  // Used for the standard case.
+  LModI(LOperand* left,
+        LOperand* right,
+        LOperand* temp1,
+        LOperand* temp2,
+        LOperand* temp3) {
+    inputs_[0] = left;
+    inputs_[1] = right;
+    temps_[0] = temp1;
+    temps_[1] = temp2;
+    temps_[2] = temp3;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(ModI, "mod-i")
   DECLARE_HYDROGEN_ACCESSOR(Mod)
 };
 
 
 class LDivI: public LTemplateInstruction<1, 2, 0> {
  public:
   LDivI(LOperand* left, LOperand* right) {
@@ skipping 1559 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_LITHIUM_ARM_H_