Make MathFloorOfDiv optimization trigger more often

src/arm/lithium-arm.cc

 // Copyright 2012 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 1386 matching lines @@
   int32_t power_of_2_factor =
     CompilerIntrinsics::CountTrailingZeros(divisor_abs);
   DivMagicNumbers magic_numbers =
     DivMagicNumberFor(divisor_abs >> power_of_2_factor);
   if (magic_numbers.M != InvalidDivMagicNumber.M) return true;
 
   return false;
 }
 
 
-HValue* LChunkBuilder::SimplifiedDividendForMathFloorOfDiv(HValue* dividend) {
-  // A value with an integer representation does not need to be transformed.
-  if (dividend->representation().IsInteger32()) {
-    return dividend;
-  // A change from an integer32 can be replaced by the integer32 value.
-  } else if (dividend->IsChange() &&
-      HChange::cast(dividend)->from().IsInteger32()) {
-    return HChange::cast(dividend)->value();
-  }
-  return NULL;
-}
-
-
 HValue* LChunkBuilder::SimplifiedDivisorForMathFloorOfDiv(HValue* divisor) {
   if (CpuFeatures::IsSupported(SUDIV)) {
     // A value with an integer representation does not need to be transformed.
     if (divisor->representation().IsInteger32()) {
       return divisor;
     // A change from an integer32 can be replaced by the integer32 value.
     } else if (divisor->IsChange() &&
                HChange::cast(divisor)->from().IsInteger32()) {
       return HChange::cast(divisor)->value();
     }
@@ skipping 1234 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseRegister(instr->index());
   return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index));
 }
 
 
 } }  // namespace v8::internal