[PATCH] D66562: [Attributor] Restrict liveness and return information to functions

[Johannes Doerfert via Phabricator via llvm-commits]

jdoerfert created this revision.
jdoerfert added reviewers: sstefan1, uenoku.
Herald added subscribers: bollu, hiraditya.
Herald added a project: LLVM.

Until we have proper call-site information we should not recompute
liveness and return information for each call site. This patch directly
uses the function versions and introduces TODOs at the usage sites.

The required iterations to get to the fixpoint are most of the time
reduced by this change and we always avoid work duplication.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D66562

Files:
  llvm/lib/Transforms/IPO/Attributor.cpp
  llvm/test/Transforms/FunctionAttrs/align.ll
  llvm/test/Transforms/FunctionAttrs/arg_returned.ll
  llvm/test/Transforms/FunctionAttrs/noalias_returned.ll
  llvm/test/Transforms/FunctionAttrs/nofree-attributor.ll
  llvm/test/Transforms/FunctionAttrs/nonnull.ll
  llvm/test/Transforms/FunctionAttrs/noreturn_async.ll
  llvm/test/Transforms/FunctionAttrs/read_write_returned_arguments_scc.ll

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