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Andrew Trick
d9eb9c8780
LSR: Don't optimize loops if an outer loop has no preheader.
LoopSimplify may not run on some outer loops, e.g. because of indirect branches. SCEVExpander simply cannot handle outer loops with no preheaders. Fixes rdar://10655343 SCEVExpander segfault. llvm-svn: 147718
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