Fix the objc_storeStrong recognizer to stop before walking off the

end of a basic block if there's no store.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156520 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 34 insertions, 0 deletions

diff --git a/test/Transforms/ObjCARC/contract-storestrong.ll b/test/Transforms/ObjCARC/contract-storestrong.ll
index de84b41b8e..2922f816d5 100644
--- a/test/Transforms/ObjCARC/contract-storestrong.ll
+++ b/test/Transforms/ObjCARC/contract-storestrong.ll
@@ -132,4 +132,38 @@ entry:
   ret i1 %t
 }
 
+; Like test0, but there's no store, so don't form an objc_storeStrong.
+
+;      CHECK: define void @test7(
+; CHECK-NEXT: entry:
+; CHECK-NEXT:   %0 = tail call i8* @objc_retain(i8* %p) nounwind
+; CHECK-NEXT:   %tmp = load i8** @x, align 8
+; CHECK-NEXT:   tail call void @objc_release(i8* %tmp) nounwind
+; CHECK-NEXT:   ret void
+; CHECK-NEXT: }
+define void @test7(i8* %p) {
+entry:
+  %0 = tail call i8* @objc_retain(i8* %p) nounwind
+  %tmp = load i8** @x, align 8
+  tail call void @objc_release(i8* %tmp) nounwind
+  ret void
+}
+
+; Like test0, but there's no retain, so don't form an objc_storeStrong.
+
+;      CHECK: define void @test8(
+; CHECK-NEXT: entry:
+; CHECK-NEXT:   %tmp = load i8** @x, align 8
+; CHECK-NEXT:   store i8* %p, i8** @x, align 8
+; CHECK-NEXT:   tail call void @objc_release(i8* %tmp) nounwind
+; CHECK-NEXT:   ret void
+; CHECK-NEXT: }
+define void @test8(i8* %p) {
+entry:
+  %tmp = load i8** @x, align 8
+  store i8* %p, i8** @x, align 8
+  tail call void @objc_release(i8* %tmp) nounwind
+  ret void
+}
+
 !0 = metadata !{}