https://bugs.llvm.org/show_bug.cgi?id=38663
Bug ID: 38663
Summary: lld from llvm 6 crashes with stack overflow
@CopyRewriter::getNewSource when doing PGO + LTO of
Firefox
Product: new-bugs
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: mh+l...@glandium.org
CC: llvm-bugs@lists.llvm.org, sylves...@debian.org
When building Firefox with clang 6, and enabling both PGO and LTO, the linker
crashes on linux 64-bits with what appears to be an infinite recursion through
CopyRewriter::getNewSource.
After some bisecting, I found the following:
- r322684 is the first revision that is broken on the release_60 branch.
- that revision is a cherry pick of r322313 from trunk, which is
similarly broken.
- trunk was fixed by r322325, which, funnily enough, predates when
r322313 was cherry-picked (and supposedly came with no functional change).
I guess the release_60 branch is dead at this point, but if it's not, this
should be addressed.
This doesn't affect clang 7 (obviously, since r322325 fixed it).
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