Yingwei Zheng 52fac608bd [InstCombine] Fold [l|a]shr iN (X-1)&~X, N-1 -> [z|s]ext(X==0) (#107259) ...

Alive2: https://alive2.llvm.org/ce/z/kwvTFn
Closes #107228.

`ashr iN (X-1)&~X, N-1` also exists. See
https://github.com/dtcxzyw/llvm-opt-benchmark/issues/1274.

2024-09-06 21:37:50 +08:00

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