[all-commits] [llvm/llvm-project] 564373: [AArch64][GlobalISel] Widen G_SELECT before clampi...

[Jessica Paquette via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 564373637832b3ac2a4434c45f58c066c08e9b8c
      https://github.com/llvm/llvm-project/commit/564373637832b3ac2a4434c45f58c066c08e9b8c
  Author: Jessica Paquette <jpaquette at apple.com>
  Date:   2021-08-03 (Tue, 03 Aug 2021)

  Changed paths:
    M llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-select.mir

  Log Message:
  -----------
  [AArch64][GlobalISel] Widen G_SELECT before clamping it

This allows us to handle the s88 G_SELECTS:

https://godbolt.org/z/5s18M4erY

Weird types like this can result in weird merges.

Widening to s128 first and then clamping down avoids that situation.

Differential Revision: https://reviews.llvm.org/D107415