If SI->size() is 0, we are not allowed to dereference ->begin().
This fixed PR3078.
llvm-svn: 59416
diff --git a/llvm/lib/Transforms/IPO/ArgumentPromotion.cpp b/llvm/lib/Transforms/IPO/ArgumentPromotion.cpp
index d66e2c4..00d06ba 100644
--- a/llvm/lib/Transforms/IPO/ArgumentPromotion.cpp
+++ b/llvm/lib/Transforms/IPO/ArgumentPromotion.cpp
@@ -565,9 +565,11 @@
// Add a parameter to the function for each element passed in.
for (ScalarizeTable::iterator SI = ArgIndices.begin(),
E = ArgIndices.end(); SI != E; ++SI) {
+ unsigned num = SI->size();
+ // not allowed to dereference ->begin() if size() is 0
Params.push_back(GetElementPtrInst::getIndexedType(I->getType(),
- &*SI->begin(),
- SI->size()));
+ num ? &*SI->begin(): 0,
+ num));
assert(Params.back());
}