DeadStoreElimination can treat byval parameters as if there were alloca's for the purpose of removing end-of-function stores.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46351 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/test/Transforms/DeadStoreElimination/byval.ll b/test/Transforms/DeadStoreElimination/byval.ll
new file mode 100644
index 0000000000..08f69a40c5
--- /dev/null
+++ b/test/Transforms/DeadStoreElimination/byval.ll
@@ -0,0 +1,10 @@
+; RUN: llvm-as < %s | opt -dse | llvm-dis | not grep store
+
+%struct.x = type { i32, i32, i32, i32 }
+
+define i32 @foo(%struct.x* byval  %a) nounwind  {
+entry:
+	%tmp2 = getelementptr %struct.x* %a, i32 0, i32 0
+	store i32 1, i32* %tmp2, align 4
+	ret i32 1
+}