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9733249
2015 Jul 31
1
[LLVMdev] RFC - Making SamplePGO a module pass
Dehao and I have been discussing changes we need to make to SamplePGO to
make it more effective.
Currently, SamplePGO is a scalar pass that limits itself to add branch
weight annotations. It runs pretty early in the pipeline, so this is fine
for other scalar passes that want to use profile data (block layout and
regalloc).
However, it does nothing to help module passes. Notably, the inliner.