[PATCH] D66781: [Attributor] Use existing function information for the call site

[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.

Instead of recomputing information for call sites we now use the
function information directly. This is always valid and once we have
call site specific information we can improve here.

This patch also bootstraps attributes that are created on-demand through
an initial update call. Information that is known will then directly be
available in the new attribute without causing an iteration delay.

The tests show how this improves the iteration count.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D66781

Files:
  llvm/include/llvm/Transforms/IPO/Attributor.h
  llvm/lib/Transforms/IPO/Attributor.cpp
  llvm/test/Transforms/FunctionAttrs/align.ll
  llvm/test/Transforms/FunctionAttrs/arg_nocapture.ll
  llvm/test/Transforms/FunctionAttrs/arg_returned.ll
  llvm/test/Transforms/FunctionAttrs/dereferenceable.ll
  llvm/test/Transforms/FunctionAttrs/fn_noreturn.ll
  llvm/test/Transforms/FunctionAttrs/liveness.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/noreturn_sync.ll
  llvm/test/Transforms/FunctionAttrs/nounwind.ll
  llvm/test/Transforms/FunctionAttrs/read_write_returned_arguments_scc.ll

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