Add a testcase for the canonicalizations now performed by deadargelim.

llvm-svn: 53611

1 files changed, 24 insertions, 0 deletions

diff --git a/llvm/test/Transforms/DeadArgElim/canon.ll b/llvm/test/Transforms/DeadArgElim/canon.ll
new file mode 100644
index 00000000000..b8adb713a7a
--- /dev/null
+++ b/llvm/test/Transforms/DeadArgElim/canon.ll
@@ -0,0 +1,24 @@
+; This test shows a few canonicalizations made by deadargelim
+; RUN: llvm-as < %s | opt -deadargelim | llvm-dis > %t
+; This test should remove {} and replace it with void
+; RUN: cat %t | grep {define internal void @test}
+; This test shouls replace the {i32} return value with just i32
+; RUN: cat %t | grep {define internal i32 @test2}
+
+define internal {} @test() {
+  ret {} undef
+}
+
+define internal {i32} @test2() {
+  ret {i32} undef;
+}
+
+define void @caller() {
+  call {} @test()
+  %X = call {i32} @test2();
+  %Y = extractvalue {i32} %X, 0
+  call void @user(i32 %Y, {i32} %X)
+  ret void
+}
+
+declare void @user(i32, {i32})