[all-commits] [llvm/llvm-project] 765ef4: [X86] Check destination element type before formin...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 765ef4bb2af604ea2bbd6c1bffaa6e1600804c9e
      https://github.com/llvm/llvm-project/commit/765ef4bb2af604ea2bbd6c1bffaa6e1600804c9e
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2021-06-09 (Wed, 09 Jun 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-trunc-ssat.ll

  Log Message:
  -----------
  [X86] Check destination element type before forming VTRUNCS/VTRUNCUS in combineTruncateWithSat.

Fixes crash reported here https://reviews.llvm.org/D73607

Using a store to keep the trunc intact. Returning v16i24 would
cause the trunc to be optimized away in SelectionDAGBuilder.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D103940