[PATCH] D48404: Don't modify LibFuncs in LTO

[Jacob Gravelle via Phabricator via llvm-commits]

jgravelle-google created this revision.
jgravelle-google added a reviewer: dschuff.
Herald added subscribers: steven_wu, aheejin, inglorion, sbc100, mehdi_amini.

When performing LTO, it's possible to modify function signatures to
simplify things. There are also LTO passes that make assumptions about
LibFunc signatures. When statically linking libc, LibFunc signatures can
be simplified, which can invalidate those assumptions. This patch adds
checks to the passes that modify signatures to exclude LibFuncs.


Repository:
  rL LLVM

https://reviews.llvm.org/D48404

Files:
  include/llvm/Transforms/IPO/DeadArgumentElimination.h
  lib/Transforms/IPO/ArgumentPromotion.cpp
  lib/Transforms/IPO/DeadArgumentElimination.cpp
  test/LTO/WebAssembly/libfunc.ll

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