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The insertion point for the loads is right before the llvm.eh.exception

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call. The call may be in the same BB as the landingpad instruction. If that's
the case, then inserting the loads after the landingpad inst, but before the
extractvalues, causes undefined behavior.

llvm-svn: 139088
This commit is contained in:
Bill Wendling 2011-09-04 09:02:18 +00:00
parent b98ae4dc68
commit dbea8de893
1 changed files with 1 additions and 1 deletions
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lib/VMCore/AutoUpgrade.cpp
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@ -487,7 +487,7 @@ void llvm::UpgradeExceptionHandling(Module *M) {
std::pair<Value*,Value*> ExnSelSlots = FnToLPadSlotMap[Parent->getParent()];
IRBuilder<> Builder(Context);
Builder.SetInsertPoint(Parent, Parent->getFirstInsertionPt());
Builder.SetInsertPoint(Parent, Exn);
LoadInst *LPExn = Builder.CreateLoad(ExnSelSlots.first, "exn.load");
LoadInst *LPSel = Builder.CreateLoad(ExnSelSlots.second, "sel.load");