http://llvm.org/bugs/show_bug.cgi?id=14353
Bug #: 14353
Summary: TLS variables should not be Constant
Product: libraries
Version: trunk
Platform: All
OS/Version: All
Status: NEW
Severity: enhancement
Priority: P
Component: Core LLVM classes
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
TLS variables are a special case of GlobalVariable, which inherit from
Constant.
But a TLS variable is not really Constant, it is different for different
threads. This can cause subtle bugs, such as Bug 14309, if the optimizers fail
to take it into account.
Some discussion here:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20121112/155805.html
It would be good if we could find a way so that TLS variables were not Constant
to avoid optimizers getting this wrong.
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