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;
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));
}
--- /dev/null
+; RUN: llvm-as <%s | opt -ipsccp | llvm-dis | FileCheck %s
+; Don't constant-propagate byval pointers, since they are not pointers!
+; PR5038
+%struct.MYstr = type { i8, i32 }
+@mystr = internal global %struct.MYstr zeroinitializer ; <%struct.MYstr*> [#uses=3]
+define internal void @vfu1(%struct.MYstr* byval align 4 %u) nounwind {
+entry:
+ %0 = getelementptr %struct.MYstr* %u, i32 0, i32 1 ; <i32*> [#uses=1]
+ store i32 99, i32* %0, align 4
+; CHECK: %struct.MYstr* %u
+ %1 = getelementptr %struct.MYstr* %u, i32 0, i32 0 ; <i8*> [#uses=1]
+ store i8 97, i8* %1, align 4
+; CHECK: %struct.MYstr* %u
+ br label %return
+
+return: ; preds = %entry
+ ret void
+}
+define void @unions() nounwind {
+entry:
+ call void @vfu1(%struct.MYstr* byval align 4 @mystr) nounwind
+ ret void
+}
+