https://llvm.org/bugs/show_bug.cgi?id=26745
Bug ID: 26745
Summary: internalize can't deal with .symver renaming symbols
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Interprocedural Optimizations
Assignee: unassignedb...@nondot.org
Reporter: richard-l...@metafoo.co.uk
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Simple testcase:
void foo() {}
__asm__(".symver foo,bar@@VER");
Run through clang and then opt -internalize -internalize-public-api-list=bar,
the 'foo' function is deleted but the .symver is retained.
Either the .symver should be deleted as well, or the symbol should be kept
alive (because the versioned symbol 'bar' is part of the declared public API).
Removing one but not the other breaks the IR and results in:
fatal error: error in backend: A @@ version cannot be undefined
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