[PATCH] D95235: [InstCombine] narrow abs with sign-extended input

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

In D95235#2515765 <https://reviews.llvm.org/D95235#2515765>, @RKSimon wrote:

> Cheers - please can you add the PR48816 test case
>
>   define i8 @transform_abs_epi8(i8 %0) {
>     %2 = sext i8 %0 to i32
>     %3 = tail call i32 @llvm.abs.i32(i32 %2, i1 true)
>     %4 = trunc i32 %3 to i8
>     ret i8 %4
>   }
>   declare i32 @llvm.abs.i32(i32, i1 immarg)
>
> (and vector equivalent)

Sure - will add tests with trunc on pre-commit of tests and this patch.


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https://reviews.llvm.org/D95235