[PATCH] D137934: [InstCombine] Fold extractelt with select of constants

[Thomas Symalla via Phabricator via llvm-commits]

tsymalla added a comment.

In D137934#3925091 <https://reviews.llvm.org/D137934#3925091>, @spatel wrote:

> This is missing at least one critical pattern-matching constraint (and regression test - because this will crash):
>
>   define i32 @extelt_vecselect_const_operand_vector(<3 x i1> %c) {
>     %s = select <3 x i1> %c, <3 x i32> <i32 2, i32 3, i32 4>, <3 x i32> <i32 5, i32 6, i32 7>
>     %r = extractelement <3 x i32> %s, i32 2
>     ret i32 %r
>   }

Thanks!


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137934/new/

https://reviews.llvm.org/D137934