[all-commits] [llvm/llvm-project] 9a390d: [AArch64][GISel] fix G_ADD*/G_SUB* legalization

[tmatheson-arm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9a390d6692bdca5d4fecc0721e34fe7718df3799
      https://github.com/llvm/llvm-project/commit/9a390d6692bdca5d4fecc0721e34fe7718df3799
  Author: Tomas Matheson <tomas.matheson at arm.com>
  Date:   2022-08-30 (Tue, 30 Aug 2022)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-add.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-sadde.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-saddo.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-saddsat.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-ssube.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-ssubo.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-ssubsat.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-sub.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-uadde.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-uaddo.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-usube.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-usubo.mir

  Log Message:
  -----------
  [AArch64][GISel] fix G_ADD*/G_SUB* legalization

widenScalarDst updates the insert point to after MI, so
widenScalarSrc must be called before widenScalarDst. Otherwise
The updated Src values will appear after MI and break SSA. e.g.:

  %14:_(s64), %15:_(s1) = G_UADDE %9:_, %11:_, %13:_

becomes

  %14:_(s64), %16:_(s32) = G_UADDE %9:_, %11:_, %17:_
  %15:_(s1) = G_TRUNC %16:_(s32)
  %17:_(s32) = G_ZEXT %13:_(s1)

Differential Revision: https://reviews.llvm.org/D132547

Change-Id: Ie3458747a6879433f4d5ab9939d2bd102dd0f2db