llvm-ar: Clean up memory management with OwningPtr.

[oota-llvm.git] / test / Transforms / ObjCARC / cfg-hazards.ll

diff --git a/test/Transforms/ObjCARC/cfg-hazards.ll b/test/Transforms/ObjCARC/cfg-hazards.ll
index 58832b6700e4805f6332d073a60de87293439d34..0156d5bfb46445c3591f77b067bbd2d38bc63942 100644 (file)
--- a/test/Transforms/ObjCARC/cfg-hazards.ll
+++ b/test/Transforms/ObjCARC/cfg-hazards.ll
@@ -8,6 +8,7 @@ declare void @use_pointer(i8*)
 declare i8* @objc_retain(i8*)
 declare void @objc_release(i8*)
 declare void @callee()
+declare void @block_callee(void ()*)
 
 ; CHECK: define void @test0(
 ; CHECK:   call i8* @objc_retain(
@@ -88,7 +89,7 @@ for.end:                                          ; preds = %for.body
 
 ;      CHECK: define void @test3(i8* %a) #0 {
 ; CHECK-NEXT: entry:
-; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) nounwind
+; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) [[NUW:#[0-9]+]]
 ; CHECK-NEXT:   br label %loop
 ;  CHECK-NOT:   @objc_
 ;      CHECK: exit:
@@ -114,7 +115,7 @@ exit:
 
 ;      CHECK: define void @test4(i8* %a) #0 {
 ; CHECK-NEXT: entry:
-; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) nounwind
+; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) [[NUW]]
 ; CHECK-NEXT:   br label %loop
 ;  CHECK-NOT:   @objc_
 ;      CHECK: exit:
@@ -144,7 +145,7 @@ exit:
 
 ;      CHECK: define void @test5(i8* %a) #0 {
 ; CHECK-NEXT: entry:
-; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) nounwind
+; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) [[NUW]]
 ; CHECK-NEXT:   call void @callee()
 ; CHECK-NEXT:   br label %loop
 ;  CHECK-NOT:   @objc_
@@ -178,7 +179,7 @@ exit:
 
 ;      CHECK: define void @test6(i8* %a) #0 {
 ; CHECK-NEXT: entry:
-; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) nounwind
+; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) [[NUW]]
 ; CHECK-NEXT:   br label %loop
 ;  CHECK-NOT:   @objc_
 ;      CHECK: exit:
@@ -211,7 +212,7 @@ exit:
 
 ;      CHECK: define void @test7(i8* %a) #0 {
 ; CHECK-NEXT: entry:
-; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) nounwind
+; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) [[NUW]]
 ; CHECK-NEXT:   call void @callee()
 ; CHECK-NEXT:   br label %loop
 ;  CHECK-NOT:   @objc_
@@ -244,7 +245,7 @@ exit:
 
 ;      CHECK: define void @test8(i8* %a) #0 {
 ; CHECK-NEXT: entry:
-; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) nounwind
+; CHECK-NEXT:   tail call i8* @objc_retain(i8* %a) [[NUW]]
 ; CHECK-NEXT:   br label %loop
 ;  CHECK-NOT:   @objc_
 ;      CHECK: exit:
@@ -364,13 +365,13 @@ exit:
 
 ;      CHECK: define void @test12(i8* %a) #0 {
 ; CHECK-NEXT: entry:
-; CHECK-NEXT:   %outer = tail call i8* @objc_retain(i8* %a) nounwind
-; CHECK-NEXT:   %inner = tail call i8* @objc_retain(i8* %a) nounwind
+; CHECK-NEXT:   %outer = tail call i8* @objc_retain(i8* %a) [[NUW]]
+; CHECK-NEXT:   %inner = tail call i8* @objc_retain(i8* %a) [[NUW]]
 ; CHECK-NEXT:   br label %loop
 ;  CHECK-NOT:   @objc_
 ;      CHECK: exit:
-; CHECK-NEXT: call void @objc_release(i8* %a) nounwind
-; CHECK-NEXT: call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
+; CHECK-NEXT: call void @objc_release(i8* %a) [[NUW]]
+; CHECK-NEXT: call void @objc_release(i8* %a) [[NUW]], !clang.imprecise_release !0
 ; CHECK-NEXT:   ret void
 ; CHECK-NEXT: }
 define void @test12(i8* %a) nounwind {
@@ -394,6 +395,41 @@ exit:
   ret void
 }
 
-; CHECK: attributes #0 = { nounwind }
+; Do not improperly pair retains in a for loop with releases outside of a for
+; loop when the proper pairing is disguised by a separate provenance represented
+; by an alloca.
+; rdar://12969722
+
+; CHECK: define void @test13(i8* %a) [[NUW]] {
+; CHECK: entry:
+; CHECK:   tail call i8* @objc_retain(i8* %a) [[NUW]]
+; CHECK: loop:
+; CHECK:   tail call i8* @objc_retain(i8* %a) [[NUW]]
+; CHECK:   call void @block_callee
+; CHECK:   call void @objc_release(i8* %reloaded_a) [[NUW]]
+; CHECK: exit:
+; CHECK:   call void @objc_release(i8* %a) [[NUW]]
+; CHECK: }
+define void @test13(i8* %a) nounwind {
+entry:
+  %block = alloca i8*
+  %a1 = tail call i8* @objc_retain(i8* %a) nounwind
+  br label %loop
+
+loop:
+  %a2 = tail call i8* @objc_retain(i8* %a) nounwind
+  store i8* %a, i8** %block, align 8
+  %casted_block = bitcast i8** %block to void ()*
+  call void @block_callee(void ()* %casted_block)
+  %reloaded_a = load i8** %block, align 8
+  call void @objc_release(i8* %reloaded_a) nounwind, !clang.imprecise_release !0
+  br i1 undef, label %loop, label %exit
+  
+exit:
+  call void @objc_release(i8* %a) nounwind, !clang.imprecise_release !0
+  ret void
+}
+
+; CHECK: attributes [[NUW]] = { nounwind }
 
 !0 = metadata !{}