Yingwei Zheng 42ed775783 [InstSimplify] Generalize simplifyAndOrOfFCmps to handle fabs (#116590) ...

This patch generalizes https://github.com/llvm/llvm-project/issues/81027
to handle pattern `and/or (fcmp ord/uno X, 0), (fcmp pred fabs(X), Y)`.
Alive2: https://alive2.llvm.org/ce/z/tsgUrz
The correctness is straightforward because `fcmp ord/uno X, 0.0` is
equivalent to `fcmp ord/uno fabs(X), 0.0`. We may generalize it to
handle fneg as well.

Address comment
https://github.com/llvm/llvm-project/pull/116065#pullrequestreview-2434796846

2024-11-19 20:10:40 +08:00

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