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

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

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
  }


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D137934/new/

https://reviews.llvm.org/D137934