[PATCH] D52836: [LTO] Account for overriding lib calls via the alias attribute

[Warren Ristow via Phabricator via llvm-commits]

wristow created this revision.
wristow added reviewers: pcc, spatel.
Herald added subscribers: dexonsmith, steven_wu, inglorion, mehdi_amini.

Given a library call that is represented as an llvm intrinsic call, but later transformed to an actual call, if an overriding definition of that library routine is provided indirectly via an alias, verify that LTO does not eliminate the definition.

This is a proposed fix for PR38547.


https://reviews.llvm.org/D52836

Files:
  lib/LTO/UpdateCompilerUsed.cpp
  test/LTO/X86/libcall-overridden-via-alias.ll

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