[PATCH] D90217: [GlobalISel] Fold a chain of two shift instructions with constant operands

[Mirko Brkusanin via Phabricator via llvm-commits]

mbrkusanin created this revision.
mbrkusanin added reviewers: foad, arsenm.
mbrkusanin added a project: LLVM.
Herald added subscribers: kerbowa, hiraditya, rovka, nhaehnle, jvesely.
mbrkusanin requested review of this revision.
Herald added a subscriber: wdng.

Sequence of same shift instructions with constant operands can be combined into
a single shift instruction.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D90217

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/ashr.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/combine-shift-imm-chain.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D90217.300938.patch
Type: text/x-patch
Size: 10175 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20201027/f96bd746/attachment.bin>