Don't constant propagate byval pointers, since they are not really pointers, but
rather structs passed by value.
This fixes PR5038.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82689 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp
index f0b5d77..bf9ec0e 100644
--- a/lib/Transforms/Scalar/SCCP.cpp
+++ b/lib/Transforms/Scalar/SCCP.cpp
@@ -1267,6 +1267,10 @@
for (Function::arg_iterator AI = F->arg_begin(), E = F->arg_end();
AI != E; ++AI, ++CAI) {
LatticeVal &IV = ValueState[AI];
+ if (AI->hasByValAttr() && isa<PointerType>(AI->getType())) {
+ IV.markOverdefined();
+ continue;
+ }
if (!IV.isOverdefined())
mergeInValue(IV, AI, getValueState(*CAI));
}