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/IPO/IPConstantPropagation.cpp b/lib/Transforms/IPO/IPConstantPropagation.cpp
index bb24486..95c3f4e 100644
--- a/lib/Transforms/IPO/IPConstantPropagation.cpp
+++ b/lib/Transforms/IPO/IPConstantPropagation.cpp
@@ -130,7 +130,8 @@
Function::arg_iterator AI = F.arg_begin();
for (unsigned i = 0, e = ArgumentConstants.size(); i != e; ++i, ++AI) {
// Do we have a constant argument?
- if (ArgumentConstants[i].second || AI->use_empty())
+ if (ArgumentConstants[i].second || AI->use_empty() ||
+ (AI->hasByValAttr() && isa<PointerType>(AI->getType())))
continue;
Value *V = ArgumentConstants[i].first;
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));
}