1 files changed, 40 insertions, 0 deletions
diff --git a/test/Transforms/IPConstantProp/2009-09-24-byval-ptr.ll b/test/Transforms/IPConstantProp/2009-09-24-byval-ptr.ll
new file mode 100644
index 0000000..f4bab35
--- /dev/null
+++ b/test/Transforms/IPConstantProp/2009-09-24-byval-ptr.ll
@@ -0,0 +1,40 @@
+; 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 internal i32 @vfu2(%struct.MYstr* byval align 4 %u) nounwind readonly {
+entry:
+  %0 = getelementptr %struct.MYstr* %u, i32 0, i32 1 ; <i32*> [#uses=1]
+  %1 = load i32* %0
+; CHECK: load i32* getelementptr inbounds (%struct.MYstr* @mystr, i32 0, i32 1) ; <i32> [#uses=1]
+  %2 = getelementptr %struct.MYstr* %u, i32 0, i32 0 ; <i8*> [#uses=1]
+  %3 = load i8* %2
+; CHECK: load i8* getelementptr inbounds (%struct.MYstr* @mystr, i32 0, i32 0) ; <i8> [#uses=1]
+  %4 = zext i8 %3 to i32
+  %5 = add i32 %4, %1
+  ret i32 %5
+}
+
+define i32 @unions() nounwind {
+entry:
+  call void @vfu1(%struct.MYstr* byval align 4 @mystr) nounwind
+  %result = call i32 @vfu2(%struct.MYstr* byval align 4 @mystr) nounwind
+
+  ret i32 %result
+}
+