[all-commits] [llvm/llvm-project] 7e91c5: [AArch64][GlobalISel] Legalize 32-bit + narrow G_S...

[Jessica Paquette via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7e91c59844a389c70040c36a9afad15fcb48dfd2
      https://github.com/llvm/llvm-project/commit/7e91c59844a389c70040c36a9afad15fcb48dfd2
  Author: Jessica Paquette <jpaquette at apple.com>
  Date:   2021-08-20 (Fri, 20 Aug 2021)

  Changed paths:
    M llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/arm64-fallback.ll
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-mul.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir

  Log Message:
  -----------
  [AArch64][GlobalISel] Legalize 32-bit + narrow G_SMULO + G_UMULO

SDAG lowers 32-bit and 64-bit G_SMULO + G_UMULO. We were missing the 32-bit
case.

For other sizes, make the 0th type a power of 2 and clamp it to either 32 bits
or 64 bits.

Right now, this will allow us to handle narrow types (e.g. s4, s24, etc.). The
LegalizerHelper doesn't support narrowing G_SMULO or G_UMULO right now. I think
we want clamping behaviour either way, so we might as well include it now to
be explicit.

Differential Revision: https://reviews.llvm.org/D108240