efriedma added inline comments.
================
Comment at: llvm/lib/IR/ConstantRange.cpp:724
auto BW = getBitWidth();
- APInt Min = APInt::getMinValue(BW).zextOrSelf(ResultBitWidth);
- APInt Max = APInt::getMaxValue(BW).zextOrSelf(ResultBitWidth);
+ APInt Min = APInt::getMinValue(BW);
+ APInt Max = APInt::getMaxValue(BW);
----------------
efriedma wrote:
> Making the bitwidth of the result here not equal to ResultBitWidth seems
> suspect.
>
> I think there should just be an `if (ResultBitWidth < BW) return
> getFull(ResultBitWidth);` here. Then a simple conversion just works.
Actually, looking at D27294 again, maybe it is actually making the result
bitwidth intentionally inflate like this.
This could use a comment explaining what it's doing, in any case.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D125557/new/
https://reviews.llvm.org/D125557
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