[all-commits] [llvm/llvm-project] 3d7682: [AMDGPU] Better support for VMEM soft clauses in G...

[jayfoad via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 3d76824b7f493e722ae4c160b47978834226c43c
      https://github.com/llvm/llvm-project/commit/3d76824b7f493e722ae4c160b47978834226c43c
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2020-05-05 (Tue, 05 May 2020)

  Changed paths:
    M llvm/lib/Target/AMDGPU/GCNHazardRecognizer.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.image.load.1d.d16.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.image.store.2d.d16.ll
    M llvm/test/CodeGen/AMDGPU/break-vmem-soft-clauses.mir
    M llvm/test/CodeGen/AMDGPU/llvm.amdgcn.image.sample.d16.dim.ll
    M llvm/test/CodeGen/AMDGPU/memory_clause.ll

  Log Message:
  -----------
  [AMDGPU] Better support for VMEM soft clauses in GCNHazardRecognizer

VMEM soft clauses only contain VMEM and FLAT instructions. Teaching
GCNHazardRecognizer::checkSoftClauseHazards that other kinds of
instructions will naturally break the clause means there are far fewer
cases where it has to insert an s_nop instruction to forcibly break the
clause.

Differential Revision: https://reviews.llvm.org/D79353