[all-commits] [llvm/llvm-project] 077a14: [AMDGPU] Mark time intrinsics as nomem, hassideeff...

[Jay Foad via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 077a14e00b75a1858cf1095129105eecdac82e69
      https://github.com/llvm/llvm-project/commit/077a14e00b75a1858cf1095129105eecdac82e69
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2021-12-07 (Tue, 07 Dec 2021)

  Changed paths:
    M llvm/include/llvm/IR/IntrinsicsAMDGPU.td
    M llvm/lib/Target/AMDGPU/SMInstructions.td

  Log Message:
  -----------
  [AMDGPU] Mark time intrinsics as nomem, hassideeffects

Adding IntrHasSideEffects to @llvm.amdgcn.s.memtime and
@llvm.amdgcn.s.memrealtime means that we can stop pretending they read
and write memory, and similarly for the corresponding pseudo
instructions.

This should stop these intrinsics from being rescheduled past all other
instructions, even ones which don't load or store.

See also https://reviews.llvm.org/D58635.

Differential Revision: https://reviews.llvm.org/D115227