diff options
| -rw-r--r-- | test/Transforms/ObjCARC/retain-block-escape-analysis.ll | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/test/Transforms/ObjCARC/retain-block-escape-analysis.ll b/test/Transforms/ObjCARC/retain-block-escape-analysis.ll new file mode 100644 index 0000000000..05f4c36ca9 --- /dev/null +++ b/test/Transforms/ObjCARC/retain-block-escape-analysis.ll @@ -0,0 +1,100 @@ +; RUN: opt -S -objc-arc < %s | FileCheck %s + +declare i8* @objc_retain(i8*) nonlazybind +declare void @objc_release(i8*) nonlazybind +declare i8* @objc_retainBlock(i8*) + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +; Use by an instruction which copies the value is an escape if the ; +; result is an escape. The current instructions with this property are: ; +; ; +; 1. BitCast. ; +; 2. GEP. ; +; 3. PhiNode. ; +; 4. SelectInst. ; +; ; +; Make sure that such instructions do not confuse the optimizer into removing ; +; an objc_retainBlock that is needed. ; +; ; +; rdar://13273675. (With extra test cases to handle bitcast, phi, and select. ; +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +define void @bitcasttest(i8* %storage, void (...)* %block) { +; CHECK: define void @bitcasttest +entry: + %t1 = bitcast void (...)* %block to i8* +; CHECK-NOT: tail call i8* @objc_retain + %t2 = tail call i8* @objc_retain(i8* %t1) +; CHECK: tail call i8* @objc_retainBlock + %t3 = tail call i8* @objc_retainBlock(i8* %t1), !clang.arc.copy_on_escape !0 + %t4 = bitcast i8* %storage to void (...)** + %t5 = bitcast i8* %t3 to void (...)* + store void (...)* %t5, void (...)** %t4, align 8 +; CHECK-NOT: call void @objc_release + call void @objc_release(i8* %t1) + ret void +} + +define void @geptest(void (...)** %storage_array, void (...)* %block) { +; CHECK: define void @geptest +entry: + %t1 = bitcast void (...)* %block to i8* +; CHECK-NOT: tail call i8* @objc_retain + %t2 = tail call i8* @objc_retain(i8* %t1) +; CHECK: tail call i8* @objc_retainBlock + %t3 = tail call i8* @objc_retainBlock(i8* %t1), !clang.arc.copy_on_escape !0 + %t4 = bitcast i8* %t3 to void (...)* + + %storage = getelementptr inbounds void (...)** %storage_array, i64 0 + + store void (...)* %t4, void (...)** %storage, align 8 +; CHECK-NOT: call void @objc_release + call void @objc_release(i8* %t1) + ret void +} + +define void @selecttest(void (...)** %store1, void (...)** %store2, + void (...)* %block) { +; CHECK: define void @selecttest +entry: + %t1 = bitcast void (...)* %block to i8* +; CHECK-NOT: tail call i8* @objc_retain + %t2 = tail call i8* @objc_retain(i8* %t1) +; CHECK: tail call i8* @objc_retainBlock + %t3 = tail call i8* @objc_retainBlock(i8* %t1), !clang.arc.copy_on_escape !0 + %t4 = bitcast i8* %t3 to void (...)* + %store = select i1 undef, void (...)** %store1, void (...)** %store2 + store void (...)* %t4, void (...)** %store, align 8 +; CHECK-NOT: call void @objc_release + call void @objc_release(i8* %t1) + ret void +} + +define void @phinodetest(void (...)** %storage1, + void (...)** %storage2, + void (...)* %block) { +; CHECK: define void @phinodetest +entry: + %t1 = bitcast void (...)* %block to i8* +; CHECK-NOT: tail call i8* @objc_retain + %t2 = tail call i8* @objc_retain(i8* %t1) +; CHECK: tail call i8* @objc_retainBlock + %t3 = tail call i8* @objc_retainBlock(i8* %t1), !clang.arc.copy_on_escape !0 + %t4 = bitcast i8* %t3 to void (...)* + br i1 undef, label %store1_set, label %store2_set + +store1_set: + br label %end + +store2_set: + br label %end + +end: + %storage = phi void (...)** [ %storage1, %store1_set ], [ %storage2, %store2_set] + store void (...)* %t4, void (...)** %storage, align 8 +; CHECK-NOT: call void @objc_release + call void @objc_release(i8* %t1) + ret void +} + +!0 = metadata !{} |