https://llvm.org/bugs/show_bug.cgi?id=27190
Bug ID: 27190
Summary: optimizer reorders code across siglongjmp call
Product: new-bugs
Version: 3.8
Hardware: PC
OS: FreeBSD
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: cperc...@freebsd.org
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
The LLVM optimizer seems to be moving a store to a local non-volatile variable
from after a siglongjmp call to before said call. This is illegal; going in
the opposite direction would be ok since local non-volatile variables *which
are modified between the sigsetjmp call and the siglongjmp call* have
unspecified values, but in this case the variable is never modified (well,
should never be modified).
Source code to follow (two attachments; putting everything into one C file
results in the optimizer behaving differently).
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