[PATCH] D135633: [GlobalISel] Combine things like (z = x <= 0 ? z = x : z = 0) -> x & (x >> bw-1)

[Jessica Paquette via Phabricator via llvm-commits]

paquette updated this revision to Diff 467598.
paquette added a comment.

Split into two combines to avoid the hook. The "and-not" combine is now opt-in by the target.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D135633/new/

https://reviews.llvm.org/D135633

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/lib/Target/AArch64/AArch64Combine.td
  llvm/test/CodeGen/AArch64/combine-select-to-and-shift.mir

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