diff options
Diffstat (limited to 'test/Transforms/ObjCARC/cfg-hazards.ll')
| -rw-r--r-- | test/Transforms/ObjCARC/cfg-hazards.ll | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/test/Transforms/ObjCARC/cfg-hazards.ll b/test/Transforms/ObjCARC/cfg-hazards.ll new file mode 100644 index 0000000..e3624df --- /dev/null +++ b/test/Transforms/ObjCARC/cfg-hazards.ll @@ -0,0 +1,86 @@ +; RUN: opt -S -objc-arc < %s | FileCheck %s +; rdar://9503416 + +; Detect loop boundaries and don't move retains and releases +; across them. + +declare void @use_pointer(i8*) +declare i8* @objc_retain(i8*) +declare void @objc_release(i8*) + +; CHECK: define void @test0( +; CHECK: call i8* @objc_retain( +; CHECK: for.body: +; CHECK-NOT: @objc +; CHECK: for.end: +; CHECK: call void @objc_release( +; CHECK: } +define void @test0(i8* %digits) { +entry: + %tmp1 = call i8* @objc_retain(i8* %digits) nounwind + call void @use_pointer(i8* %tmp1) + br label %for.body + +for.body: ; preds = %for.body, %entry + %upcDigitIndex.01 = phi i64 [ 2, %entry ], [ %inc, %for.body ] + call void @use_pointer(i8* %tmp1) + %inc = add i64 %upcDigitIndex.01, 1 + %cmp = icmp ult i64 %inc, 12 + br i1 %cmp, label %for.body, label %for.end + +for.end: ; preds = %for.body + call void @objc_release(i8* %tmp1) nounwind, !clang.imprecise_release !0 + ret void +} + +; CHECK: define void @test1( +; CHECK: call i8* @objc_retain( +; CHECK: for.body: +; CHECK-NOT: @objc +; CHECK: for.end: +; CHECK: void @objc_release( +; CHECK: } +define void @test1(i8* %digits) { +entry: + %tmp1 = call i8* @objc_retain(i8* %digits) nounwind + br label %for.body + +for.body: ; preds = %for.body, %entry + %upcDigitIndex.01 = phi i64 [ 2, %entry ], [ %inc, %for.body ] + call void @use_pointer(i8* %tmp1) + call void @use_pointer(i8* %tmp1) + %inc = add i64 %upcDigitIndex.01, 1 + %cmp = icmp ult i64 %inc, 12 + br i1 %cmp, label %for.body, label %for.end + +for.end: ; preds = %for.body + call void @objc_release(i8* %tmp1) nounwind, !clang.imprecise_release !0 + ret void +} + +; CHECK: define void @test2( +; CHECK: call i8* @objc_retain( +; CHECK: for.body: +; CHECK-NOT: @objc +; CHECK: for.end: +; CHECK: void @objc_release( +; CHECK: } +define void @test2(i8* %digits) { +entry: + %tmp1 = call i8* @objc_retain(i8* %digits) nounwind + br label %for.body + +for.body: ; preds = %for.body, %entry + %upcDigitIndex.01 = phi i64 [ 2, %entry ], [ %inc, %for.body ] + call void @use_pointer(i8* %tmp1) + %inc = add i64 %upcDigitIndex.01, 1 + %cmp = icmp ult i64 %inc, 12 + br i1 %cmp, label %for.body, label %for.end + +for.end: ; preds = %for.body + call void @use_pointer(i8* %tmp1) + call void @objc_release(i8* %tmp1) nounwind, !clang.imprecise_release !0 + ret void +} + +!0 = metadata !{} |
