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 0000000000..e3624df57b
--- /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 !{}