[PATCH] D84167: [Attributor] Use internalized version of non-exact functions

[Luofan Chen via Phabricator via llvm-commits]

bbn created this revision.
bbn added a reviewer: jdoerfert.
Herald added subscribers: llvm-commits, okura, kuter, uenoku, hiraditya.
Herald added a reviewer: sstefan1.
Herald added a reviewer: uenoku.
Herald added a reviewer: homerdin.
Herald added a reviewer: baziotis.
Herald added a project: LLVM.

This patch internalize non-exact functions and replaces of their uses
with the internalized version. Doing this enables the analysis of
non-exact functions.

We can do this because some non-exact functions with the same name
whose linkage is `linkonce_odr` or `weak_odr` should have the same
semantics, so we can safely internalize and replace use of them (the
result of the other version of this function should be the same.).
Note that not all functions can be internalized, e.g., function with
`linkonce` or `weak` linkage.

For now when specified in commandline, we internalize all functions
that meet the requirements without calculating the cost of such
internalzation.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D84167

Files:
  llvm/lib/Transforms/IPO/Attributor.cpp
  llvm/test/Transforms/Attributor/internalize.ll

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