Matthias Braun c373a1ff18
LoopRotationUtils: Special case zero-branch weight cases (#66681)
The formula I added to LoopRotationUtils does not produce reasonable
results if some of the branch weights are zero. Add special case
handling for this.

This fixes https://github.com/llvm/llvm-project/issues/66675
2023-09-22 12:57:13 -07:00
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