1 files changed, 30 insertions, 0 deletions
diff --git a/test/Transforms/DeadArgElim/keepalive.ll b/test/Transforms/DeadArgElim/keepalive.ll
new file mode 100644
index 0000000..b0b9bf3
--- /dev/null
+++ b/test/Transforms/DeadArgElim/keepalive.ll
@@ -0,0 +1,30 @@
+; RUN: opt < %s -deadargelim -S > %t
+; RUN: grep {define internal zeroext i32 @test1() nounwind} %t
+; RUN: grep {define internal %Ty @test2} %t
+
+%Ty = type <{ i32, i32 }>
+
+; Check if the pass doesn't modify anything that doesn't need changing. We feed
+; an unused argument to each function to lure it into changing _something_ about
+; the function and then changing too much.
+
+; This checks if the return value attributes are not removed
+define internal zeroext i32 @test1(i32 %DEADARG1) nounwind {
+        ret i32 1
+}
+
+; This checks if the struct doesn't get non-packed
+define internal <{ i32, i32 }> @test2(i32 %DEADARG1) {
+        ret <{ i32, i32 }> <{ i32 1, i32 2 }>
+}
+
+; We use this external function to make sure the return values don't become dead
+declare void @user(i32, <{ i32, i32 }>)
+
+define void @caller() {
+        %B = call i32 @test1(i32 1)
+        %C = call <{ i32, i32 }> @test2(i32 2)
+        call void @user(i32 %B, <{ i32, i32 }> %C)
+        ret void
+}
+