Fix inserting new elements in a specified location.

[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 15194237c4c599df6eebdcb9f825772178bd78bc..61e5a3b1dccb9e1a58cc27ffc752e31b7ea347fb 100644 (file)
--- a/test/Transforms/ObjCARC/cfg-hazards.ll
+++ b/test/Transforms/ObjCARC/cfg-hazards.ll
@@ -8,8 +8,9 @@ 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-LABEL: define void @test0(
 ; CHECK:   call i8* @objc_retain(
 ; CHECK: for.body:
 ; CHECK-NOT: @objc
@@ -34,7 +35,7 @@ for.end:                                          ; preds = %for.body
   ret void
 }
 
-; CHECK: define void @test1(
+; CHECK-LABEL: define void @test1(
 ; CHECK:   call i8* @objc_retain(
 ; CHECK: for.body:
 ; CHECK-NOT: @objc
@@ -59,7 +60,7 @@ for.end:                                          ; preds = %for.body
   ret void
 }
 
-; CHECK: define void @test2(
+; CHECK-LABEL: define void @test2(
 ; CHECK:   call i8* @objc_retain(
 ; CHECK: for.body:
 ; CHECK-NOT: @objc
@@ -86,9 +87,9 @@ for.end:                                          ; preds = %for.body
 
 ; Delete nested retain+release pairs around loops.
 
-;      CHECK: define void @test3(i8* %a) nounwind {
+;      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:
@@ -112,9 +113,9 @@ exit:
   ret void
 }
 
-;      CHECK: define void @test4(i8* %a) nounwind {
+;      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:
@@ -142,9 +143,9 @@ exit:
   ret void
 }
 
-;      CHECK: define void @test5(i8* %a) nounwind {
+;      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_
@@ -176,9 +177,9 @@ exit:
   ret void
 }
 
-;      CHECK: define void @test6(i8* %a) nounwind {
+;      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:
@@ -209,9 +210,9 @@ exit:
   ret void
 }
 
-;      CHECK: define void @test7(i8* %a) nounwind {
+;      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_
@@ -242,9 +243,9 @@ exit:
   ret void
 }
 
-;      CHECK: define void @test8(i8* %a) nounwind {
+;      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:
@@ -274,7 +275,7 @@ exit:
   ret void
 }
 
-;      CHECK: define void @test9(i8* %a) nounwind {
+;      CHECK: define void @test9(i8* %a) #0 {
 ; CHECK-NEXT: entry:
 ; CHECK-NEXT:   br label %loop
 ;  CHECK-NOT:   @objc_
@@ -303,7 +304,7 @@ exit:
   ret void
 }
 
-;      CHECK: define void @test10(i8* %a) nounwind {
+;      CHECK: define void @test10(i8* %a) #0 {
 ; CHECK-NEXT: entry:
 ; CHECK-NEXT:   br label %loop
 ;  CHECK-NOT:   @objc_
@@ -332,7 +333,7 @@ exit:
   ret void
 }
 
-;      CHECK: define void @test11(i8* %a) nounwind {
+;      CHECK: define void @test11(i8* %a) #0 {
 ; CHECK-NEXT: entry:
 ; CHECK-NEXT:   br label %loop
 ;  CHECK-NOT:   @objc_
@@ -362,15 +363,15 @@ exit:
 
 ; Don't delete anything if they're not balanced.
 
-;      CHECK: define void @test12(i8* %a) nounwind {
+;      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 {
@@ -394,4 +395,41 @@ exit:
   ret void
 }
 
+; 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 !{}