Fix bug: IndVarsSimplify/2003-12-10-RemoveInstrCrash.llx
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10385 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/IndVarSimplify.cpp b/lib/Transforms/Scalar/IndVarSimplify.cpp
index 369be47..ed5aca3 100644
--- a/lib/Transforms/Scalar/IndVarSimplify.cpp
+++ b/lib/Transforms/Scalar/IndVarSimplify.cpp
@@ -140,6 +140,8 @@
DEBUG(IV->print(std::cerr));
+ while (isa<PHINode>(AfterPHIIt)) ++AfterPHIIt;
+
// Don't do math with pointers...
const Type *IVTy = IV->Phi->getType();
if (isa<PointerType>(IVTy)) IVTy = Type::ULongTy;
@@ -204,6 +206,9 @@
PHIOps.insert(PHIOps.end(), MaybeDead->op_begin(),
MaybeDead->op_end());
MaybeDead->getParent()->getInstList().erase(MaybeDead);
+
+ // Erasing the instruction could invalidate the AfterPHI iterator!
+ AfterPHIIt = Header->begin();
}
}