Roman Lebedev 7ef6f01909 [SimplifyCFG] FoldTwoEntryPHINode(): bailout on inverted logical and/or (PR51149) ...

The logical (select) form of and/or will now be a source of problems.
We don't really account for it's inverted form, yet it exists,
and presumably we should treat it just like non-inverted form:
https://alive2.llvm.org/ce/z/BU9AXk

https://bugs.llvm.org/show_bug.cgi?id=51149 reports a reportedly-serious
perf regression that will hopefully be mitigated by this.

2021-07-22 22:19:34 +03:00

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