[PATCH] D113448: [AMDGPU] Check for unneeded shift mask in shift PatFrags.

[Abinav Puthan Purayil via Phabricator via llvm-commits]

abinavpp created this revision.
abinavpp added reviewers: arsenm, foad, rampitec.
Herald added subscribers: kerbowa, pengfei, hiraditya, t-tye, Anastasia, tpr, dstuttard, yaxunl, nhaehnle, jvesely, kzhuravl.
abinavpp requested review of this revision.
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The existing constrained shift PatFrags only dealt with masked shift
from OpenCL front-ends. This change copies the
X86DAGToDAGISel::isUnneededShiftMask() function to AMDGPU and uses it in
the shift PatFrag predicates.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D113448

Files:
  llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
  llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.h
  llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
  llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.h
  llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
  llvm/test/CodeGen/AMDGPU/GlobalISel/ashr.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/fshl.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/fshr.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/lshr.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/shl.ll
  llvm/test/CodeGen/AMDGPU/ashr.v2i16.ll
  llvm/test/CodeGen/AMDGPU/constrained-shift.ll
  llvm/test/CodeGen/AMDGPU/extract-lowbits.ll
  llvm/test/CodeGen/AMDGPU/imm16.ll
  llvm/test/CodeGen/AMDGPU/lshr.v2i16.ll
  llvm/test/CodeGen/AMDGPU/shl.ll
  llvm/test/CodeGen/AMDGPU/shl.v2i16.ll
  llvm/test/CodeGen/AMDGPU/sra.ll

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