[llvm-commits] [patch][pr12251] Use the range metadata in computeMaskedBits and add an optimization to InstructionSimplify.

[Rafael Espíndola]

>> +  for (unsigned i = 0; i < NumRanges; ++i) {
>> +    ConstantInt *Lower = cast<ConstantInt>(Ranges.getOperand(2*i + 0));
>> +    ConstantInt *Upper = cast<ConstantInt>(Ranges.getOperand(2*i + 1));
>> +    ConstantRange Range(Lower->getValue(), Upper->getValue());
>> +    if (Range.isWrappedSet())
>> +      MinLeadingZeros = 0; // -1 has no zeros
>
>
> here you could break out of the loop.

True, but for all current uses NumRanges is 1.

>
>
> Ciao, Duncan.

Cheers,
Rafael