[PATCH] D118603: [DAGCombine] Add simple folds for SSHLSAT/USHLSAT

[Bjorn Pettersson via Phabricator via llvm-commits]

bjope updated this revision to Diff 404650.
bjope added a comment.

Added test cases for undef/poison/out-of-bounds-shamt:

  (shlsat undef/poison, x) -> 0
  (shlsat x, undef/poison) -> undef
  (shlsat x, too_large_shamt) -> undef


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D118603/new/

https://reviews.llvm.org/D118603

Files:
  llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  llvm/test/CodeGen/AArch64/sshl_sat.ll
  llvm/test/CodeGen/AArch64/ushl_sat.ll

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