http://llvm.org/bugs/show_bug.cgi?id=11137
Summary: Cleanup iteration over pointer-keyed maps and other
nondeterminism
Product: libraries
Version: trunk
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Based on an IRC discussion, it seems to be about time for someone to sweep over
the code removing obvious sources of nondeterminism like iterating over a map
with pointer keys.
I haven't looked carefully to see if any of these cases cause noticeable
nondeterminism. It may be worth cleaning them up just to be rigorous about this
sort of thing.
In SimplifyCFG:
for (std::map<BasicBlock*, std::pair<unsigned, unsigned> >::iterator
I = Popularity.begin(), E = Popularity.end(); I != E; ++I) {
In DeadStoreElimination:
for (SmallPtrSet<Value*, 16>::iterator I = DeadStackObjects.begin(),
If anyone sees other suspects, please add them to this list if you don't intend
to fix it yourself!
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