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-rw-r--r--test/Transforms/ObjCARC/contract-storestrong.ll98
1 files changed, 73 insertions, 25 deletions
diff --git a/test/Transforms/ObjCARC/contract-storestrong.ll b/test/Transforms/ObjCARC/contract-storestrong.ll
index 50a2d97..c218e33 100644
--- a/test/Transforms/ObjCARC/contract-storestrong.ll
+++ b/test/Transforms/ObjCARC/contract-storestrong.ll
@@ -24,7 +24,7 @@ entry:
; Don't do this if the load is volatile.
-; CHECK: define void @test1(i8* %p) {
+; CHECK-LABEL: define void @test1(i8* %p) {
; CHECK-NEXT: entry:
; CHECK-NEXT: %0 = tail call i8* @objc_retain(i8* %p) [[NUW]]
; CHECK-NEXT: %tmp = load volatile i8** @x, align 8
@@ -43,7 +43,7 @@ entry:
; Don't do this if the store is volatile.
-; CHECK: define void @test2(i8* %p) {
+; CHECK-LABEL: define void @test2(i8* %p) {
; CHECK-NEXT: entry:
; CHECK-NEXT: %0 = tail call i8* @objc_retain(i8* %p) [[NUW]]
; CHECK-NEXT: %tmp = load i8** @x, align 8
@@ -63,15 +63,15 @@ entry:
; Don't do this if there's a use of the old pointer value between the store
; and the release.
-; CHECK: define void @test3(i8* %newValue) {
-; CHECK-NEXT: entry:
-; CHECK-NEXT: %x0 = tail call i8* @objc_retain(i8* %newValue) [[NUW]]
-; CHECK-NEXT: %x1 = load i8** @x, align 8
-; CHECK-NEXT: store i8* %x0, i8** @x, align 8
-; CHECK-NEXT: tail call void @use_pointer(i8* %x1), !clang.arc.no_objc_arc_exceptions !0
-; CHECK-NEXT: tail call void @objc_release(i8* %x1) [[NUW]], !clang.imprecise_release !0
-; CHECK-NEXT: ret void
-; CHECK-NEXT: }
+; CHECK-LABEL: define void @test3(i8* %newValue) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: %x0 = tail call i8* @objc_retain(i8* %newValue) [[NUW]]
+; CHECK-NEXT: %x1 = load i8** @x, align 8
+; CHECK-NEXT: store i8* %x0, i8** @x, align 8
+; CHECK-NEXT: tail call void @use_pointer(i8* %x1), !clang.arc.no_objc_arc_exceptions !0
+; CHECK-NEXT: tail call void @objc_release(i8* %x1) [[NUW]], !clang.imprecise_release !0
+; CHECK-NEXT: ret void
+; CHECK-NEXT: }
define void @test3(i8* %newValue) {
entry:
%x0 = tail call i8* @objc_retain(i8* %newValue) nounwind
@@ -84,15 +84,15 @@ entry:
; Like test3, but with an icmp use instead of a call, for good measure.
-; CHECK: define i1 @test4(i8* %newValue, i8* %foo) {
-; CHECK-NEXT: entry:
-; CHECK-NEXT: %x0 = tail call i8* @objc_retain(i8* %newValue) [[NUW]]
-; CHECK-NEXT: %x1 = load i8** @x, align 8
-; CHECK-NEXT: store i8* %x0, i8** @x, align 8
-; CHECK-NEXT: %t = icmp eq i8* %x1, %foo
-; CHECK-NEXT: tail call void @objc_release(i8* %x1) [[NUW]], !clang.imprecise_release !0
-; CHECK-NEXT: ret i1 %t
-; CHECK-NEXT: }
+; CHECK-LABEL: define i1 @test4(i8* %newValue, i8* %foo) {
+; CHECK-NEXT: entry:
+; CHECK-NEXT: %x0 = tail call i8* @objc_retain(i8* %newValue) [[NUW]]
+; CHECK-NEXT: %x1 = load i8** @x, align 8
+; CHECK-NEXT: store i8* %x0, i8** @x, align 8
+; CHECK-NEXT: %t = icmp eq i8* %x1, %foo
+; CHECK-NEXT: tail call void @objc_release(i8* %x1) [[NUW]], !clang.imprecise_release !0
+; CHECK-NEXT: ret i1 %t
+; CHECK-NEXT: }
define i1 @test4(i8* %newValue, i8* %foo) {
entry:
%x0 = tail call i8* @objc_retain(i8* %newValue) nounwind
@@ -105,7 +105,7 @@ entry:
; Do form an objc_storeStrong here, because the use is before the store.
-; CHECK: define i1 @test5(i8* %newValue, i8* %foo) {
+; CHECK-LABEL: define i1 @test5(i8* %newValue, i8* %foo) {
; CHECK: %t = icmp eq i8* %x1, %foo
; CHECK: tail call void @objc_storeStrong(i8** @x, i8* %newValue) [[NUW]]
; CHECK: }
@@ -121,7 +121,7 @@ entry:
; Like test5, but the release is before the store.
-; CHECK: define i1 @test6(i8* %newValue, i8* %foo) {
+; CHECK-LABEL: define i1 @test6(i8* %newValue, i8* %foo) {
; CHECK: %t = icmp eq i8* %x1, %foo
; CHECK: tail call void @objc_storeStrong(i8** @x, i8* %newValue) [[NUW]]
; CHECK: }
@@ -137,7 +137,7 @@ entry:
; Like test0, but there's no store, so don't form an objc_storeStrong.
-; CHECK-LABEL: define void @test7(
+; CHECK-LABEL: define void @test7(
; CHECK-NEXT: entry:
; CHECK-NEXT: %0 = tail call i8* @objc_retain(i8* %p) [[NUW]]
; CHECK-NEXT: %tmp = load i8** @x, align 8
@@ -154,7 +154,7 @@ entry:
; Like test0, but there's no retain, so don't form an objc_storeStrong.
-; CHECK-LABEL: define void @test8(
+; CHECK-LABEL: define void @test8(
; CHECK-NEXT: entry:
; CHECK-NEXT: %tmp = load i8** @x, align 8
; CHECK-NEXT: store i8* %p, i8** @x, align 8
@@ -169,6 +169,54 @@ entry:
ret void
}
-!0 = metadata !{}
+; Make sure that we properly handle release that *may* release our new
+; value in between the retain and the store. We need to be sure that
+; this we can safely move the retain to the store. This specific test
+; makes sure that we properly handled a release of an unrelated
+; pointer.
+;
+; CHECK-LABEL: define i1 @test9(i8* %newValue, i8* %foo, i8* %unrelated_ptr) {
+; CHECK-NOT: objc_storeStrong
+define i1 @test9(i8* %newValue, i8* %foo, i8* %unrelated_ptr) {
+entry:
+ %x0 = tail call i8* @objc_retain(i8* %newValue) nounwind
+ tail call void @objc_release(i8* %unrelated_ptr) nounwind, !clang.imprecise_release !0
+ %x1 = load i8** @x, align 8
+ tail call void @objc_release(i8* %x1) nounwind, !clang.imprecise_release !0
+ %t = icmp eq i8* %x1, %foo
+ store i8* %newValue, i8** @x, align 8
+ ret i1 %t
+}
+
+; Make sure that we don't perform the optimization when we just have a call.
+;
+; CHECK-LABEL: define i1 @test10(i8* %newValue, i8* %foo, i8* %unrelated_ptr) {
+; CHECK-NOT: objc_storeStrong
+define i1 @test10(i8* %newValue, i8* %foo, i8* %unrelated_ptr) {
+entry:
+ %x0 = tail call i8* @objc_retain(i8* %newValue) nounwind
+ call void @use_pointer(i8* %unrelated_ptr)
+ %x1 = load i8** @x, align 8
+ tail call void @objc_release(i8* %x1) nounwind, !clang.imprecise_release !0
+ %t = icmp eq i8* %x1, %foo
+ store i8* %newValue, i8** @x, align 8
+ ret i1 %t
+}
+
+; Make sure we form the store strong if the use in between the retain
+; and the store does not touch reference counts.
+; CHECK-LABEL: define i1 @test11(i8* %newValue, i8* %foo, i8* %unrelated_ptr) {
+; CHECK: objc_storeStrong
+define i1 @test11(i8* %newValue, i8* %foo, i8* %unrelated_ptr) {
+entry:
+ %x0 = tail call i8* @objc_retain(i8* %newValue) nounwind
+ %t = icmp eq i8* %newValue, %foo
+ %x1 = load i8** @x, align 8
+ tail call void @objc_release(i8* %x1) nounwind, !clang.imprecise_release !0
+ store i8* %newValue, i8** @x, align 8
+ ret i1 %t
+}
+
+!0 = !{}
; CHECK: attributes [[NUW]] = { nounwind }
generated by cgit v1.1 at 2024-12-22 22:47:25 +0000