1 files changed, 21 insertions, 0 deletions
diff --git a/test/Transforms/ObjCARC/gvn.ll b/test/Transforms/ObjCARC/gvn.ll
new file mode 100644
index 0000000..6917b02
--- /dev/null
+++ b/test/Transforms/ObjCARC/gvn.ll
@@ -0,0 +1,21 @@
+; RUN: opt -S -basicaa -objc-arc -gvn < %s | FileCheck %s
+
+@x = common global i8* null, align 8
+
+declare i8* @objc_retain(i8*)
+
+; GVN should be able to eliminate this redundant load, with ARC-specific
+; alias analysis.
+
+; CHECK: @foo
+; CHECK-NEXT: entry:
+; CHECK-NEXT: %s = load i8** @x
+; CHECK-NOT: load
+; CHECK: ret i8* %s
+define i8* @foo(i32 %n) nounwind {
+entry:
+  %s = load i8** @x
+  %0 = tail call i8* @objc_retain(i8* %s) nounwind
+  %t = load i8** @x
+  ret i8* %s
+}