[all-commits] [llvm/llvm-project] 7b8d50: [InstSimplify] Clarify use of FixedVectorType in S...

[Cullen Rhodes via All-commits]

  Branch: refs/heads/temp-test-main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7b8d50b141bbf223eab33a75f468be4ee92ad052
      https://github.com/llvm/llvm-project/commit/7b8d50b141bbf223eab33a75f468be4ee92ad052
  Author: Cullen Rhodes <cullen.rhodes at arm.com>
  Date:   2020-11-27 (Fri, 27 Nov 2020)

  Changed paths:
    M llvm/lib/Analysis/InstructionSimplify.cpp
    M llvm/test/Transforms/InstSimplify/select.ll

  Log Message:
  -----------
  [InstSimplify] Clarify use of FixedVectorType in SimplifySelectInst

Folding a select of vector constants that include undef elements only
applies to fixed vectors, but there's no earlier check the type is not
scalable so it crashes for scalable vectors. This adds a check so this
optimization is only attempted for fixed vectors.

Reviewed By: sdesmalen

Differential Revision: https://reviews.llvm.org/D92046