ARM: Implement DoModI stub in the lithium code generator.

src/arm/lithium-arm.cc

 // 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 1237 matching lines @@
     return AssignEnvironment(AssignPointerMap(
              DefineFixed(new LDivI(value, divisor), r0)));
   } else {
     return DoArithmeticT(Token::DIV, instr);
   }
 }
 
 
 LInstruction* LChunkBuilder::DoMod(HMod* instr) {
   if (instr->representation().IsInteger32()) {
+    // TODO(1042) The fixed register allocation
+    // is needed because we call GenericBinaryOpStub from
+    // the generated code, which requires registers r0
+    // and r1 to be used. We should remove that
+    // when we provide a native implementation.
     ASSERT(instr->left()->representation().IsInteger32());
     ASSERT(instr->right()->representation().IsInteger32());
-    // The temporary operand is necessary to ensure that right is not allocated
-    // into edx.
-    FixedTemp(r1);
     LOperand* value = UseFixed(instr->left(), r0);
-    LOperand* divisor = UseRegister(instr->right());
-    LInstruction* result = DefineFixed(new LModI(value, divisor), r1);
-    if (instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
-        instr->CheckFlag(HValue::kCanBeDivByZero)) {
-      result = AssignEnvironment(result);
-    }
+    LOperand* divisor = UseFixed(instr->right(), r1);
+    LInstruction* result = DefineFixed(new LModI(value, divisor), r0);
+    result = AssignEnvironment(AssignPointerMap(result));
     return result;
   } else if (instr->representation().IsTagged()) {
     return DoArithmeticT(Token::MOD, instr);
   } else {
     ASSERT(instr->representation().IsDouble());
     // We call a C function for double modulo. It can't trigger a GC.
     // We need to use fixed result register for the call.
     // TODO(fschneider): Allow any register as input registers.
     LOperand* left = UseFixedDouble(instr->left(), d1);
     LOperand* right = UseFixedDouble(instr->right(), d2);
@@ skipping 556 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
   HEnvironment* outer = current_block_->last_environment()->outer();
   current_block_->UpdateEnvironment(outer);
   return NULL;
 }
 
 
 } }  // namespace v8::internal