[PATCH] D150670: [WebAssembly] Disable generation of fshl/fshr for rotates

[Paulo Matos via Phabricator via llvm-commits]

pmatos updated this revision to Diff 526556.
pmatos added a comment.

Implement optimization when demanded bits are known, skip otherwise for rotates.

@nikic Things look much better now. Thanks for your help with the changes in InstCombine. What do you think?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D150670/new/

https://reviews.llvm.org/D150670

Files:
  clang/test/CodeGen/WebAssembly/wasm-rotate.c
  llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
  llvm/test/CodeGen/WebAssembly/rotate-i3264.ll
  llvm/test/Transforms/InstCombine/fsh.ll

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