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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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139088 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-09-04 09:02:18 +00:00
parent e4553af561
commit 66d1836380
1 changed files with 1 additions and 1 deletions
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2
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");