http://llvm.org/bugs/show_bug.cgi?id=4238
Summary: Many passes do not preserve domtree and/or domfrontier
info properly
Product: new-bugs
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Making this change in lib/VMCore/PassManager.cpp
-bool VerifyDomInfo = false;
+bool VerifyDomInfo = true;
so it always verifies dominator info, then running "make check" shows
that many transforms are failing to correctly preserve dom info. The
loop passes are particularly bad, for example "loop-index-split".
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