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Author SHA1 Message Date
Matthias Braun
2404477219
LoopVectorize: Add better heuristic for vectorized epilogue skip test (#72589) 
This is a follow-up to PR #72450 correcting the branch_weights used
for the test whether the vectorized epilogue loop should be skipped.
 2023-11-20 11:02:27 -08:00
Matthias Braun
a9cc6fc280
LoopVectorize: Set branch_weight for conditional branches (#72450) 
Consistently add `branch_weights` metadata in any condition branch
created by `LoopVectorize.cpp`:
- Will only add metadata if the original loop-latch branch had metadata
assigned.
- Most checks should rarely trigger so I am using a 127:1 ratio.
- For the middle block we assume an equal distribution of modulo
results.
 2023-11-16 11:33:46 -08:00