[PATCH] D118764: Pre-commit test cases for DAG combine folds of SSHLSAT/USHLSAT -> SHL

[Bjorn Pettersson via Phabricator via llvm-commits]

bjope created this revision.
bjope requested review of this revision.
Herald added a project: LLVM.

It should be possible to replace SSHLSAT and USHLSAT with SHL when
it is known that no saturation will take place (e.g. by analysing
known sign bits in the first shift operand).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D118764

Files:
  llvm/test/CodeGen/AArch64/sshl_sat.ll
  llvm/test/CodeGen/AArch64/ushl_sat.ll

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