[all-commits] [llvm/llvm-project] 10ed1e: [MachineSink] Allow sinking of constant or ignorab...

[vangthao95 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 10ed1eca241f893085b8db40138e588e72aaee3a
      https://github.com/llvm/llvm-project/commit/10ed1eca241f893085b8db40138e588e72aaee3a
  Author: Vang Thao <vang.thao at amd.com>
  Date:   2022-01-18 (Tue, 18 Jan 2022)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetInstrInfo.h
    M llvm/lib/CodeGen/MachineSink.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/sdiv.i64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/srem.i64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/udiv.i64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/urem.i64.ll
    M llvm/test/CodeGen/AMDGPU/frame-index-elimination.ll
    A llvm/test/CodeGen/AMDGPU/machine-sink-ignorable-exec-use.mir
    M llvm/test/CodeGen/AMDGPU/mul24-pass-ordering.ll
    M llvm/test/CodeGen/AMDGPU/skip-if-dead.ll
    M llvm/test/CodeGen/AMDGPU/stack-pointer-offset-relative-frameindex.ll

  Log Message:
  -----------
  [MachineSink] Allow sinking of constant or ignorable physreg uses

For AMDGPU, any use of the physical register EXEC prevents sinking even if it is not a real physical register read. Add check to see if a physical
register use can be ignored for sinking.

Also perform same constant and ignorable physical register check when considering sinking in loops.

https://reviews.llvm.org/D116053