[objc-arc] Committed test for r185770 as per dblaikie's suggestion.

llvm-svn: 185782

1 files changed, 19 insertions, 0 deletions

diff --git a/llvm/test/Transforms/ObjCARC/gvn.ll b/llvm/test/Transforms/ObjCARC/gvn.ll
index 8d9b1bb84b8..1c55ee5c8ab 100644
--- a/llvm/test/Transforms/ObjCARC/gvn.ll
+++ b/llvm/test/Transforms/ObjCARC/gvn.ll
@@ -3,6 +3,8 @@
 @x = common global i8* null, align 8
 
 declare i8* @objc_retain(i8*)
+declare i32 @objc_sync_enter(i8*)
+declare i32 @objc_sync_exit(i8*)
 
 ; GVN should be able to eliminate this redundant load, with ARC-specific
 ; alias analysis.
@@ -20,3 +22,20 @@ entry:
   %t = load i8** @x
   ret i8* %t
 }
+
+; GVN should not be able to eliminate this redundant load, with ARC-specific
+; alias analysis.
+
+; CHECK: define i8* @test1
+; CHECK: load
+; CHECK: load
+; CHECK: ret i8* %t
+; CHECK: }
+define i8* @test1(i32 %n) nounwind {
+entry:
+  %s = load i8** @x
+  %0 = call i32 @objc_sync_enter(i8* %s)
+  %t = load i8** @x
+  %1 = call i32 @objc_sync_exit(i8* %s)
+  ret i8* %t
+}