DI: Fold constant arguments into a single MDString

[oota-llvm.git] / test / Transforms / ObjCARC / contract-storestrong.ll

diff --git a/test/Transforms/ObjCARC/contract-storestrong.ll b/test/Transforms/ObjCARC/contract-storestrong.ll
index fda2ff4cbfcbf76bb4539cd2c7f45255ab4724e2..50a2d9756648d68823aebaa4b8e4af91e2c50bf2 100644 (file)
--- a/test/Transforms/ObjCARC/contract-storestrong.ll
+++ b/test/Transforms/ObjCARC/contract-storestrong.ll
@@ -4,13 +4,15 @@ target datalayout = "e-p:64:64:64"
 
 declare i8* @objc_retain(i8*)
 declare void @objc_release(i8*)
+declare void @use_pointer(i8*)
 
 @x = external global i8*
 
-; CHECK: define void @test0(
+; CHECK-LABEL: define void @test0(
 ; CHECK: entry:
-; CHECK-NEXT: call void @objc_storeStrong(i8** @x, i8* %p) nounwind
+; CHECK-NEXT: tail call void @objc_storeStrong(i8** @x, i8* %p) [[NUW:#[0-9]+]]
 ; CHECK-NEXT: ret void
+; CHECK-NEXT: }
 define void @test0(i8* %p) {
 entry:
   %0 = tail call i8* @objc_retain(i8* %p) nounwind
@@ -24,10 +26,10 @@ entry:
 
 ;      CHECK: define void @test1(i8* %p) {
 ; CHECK-NEXT: entry:
-; CHECK-NEXT:   %0 = tail call i8* @objc_retain(i8* %p) nounwind
+; CHECK-NEXT:   %0 = tail call i8* @objc_retain(i8* %p) [[NUW]]
 ; CHECK-NEXT:   %tmp = load volatile i8** @x, align 8
 ; CHECK-NEXT:   store i8* %0, i8** @x, align 8
-; CHECK-NEXT:   tail call void @objc_release(i8* %tmp) nounwind
+; CHECK-NEXT:   tail call void @objc_release(i8* %tmp) [[NUW]]
 ; CHECK-NEXT:   ret void
 ; CHECK-NEXT: }
 define void @test1(i8* %p) {
@@ -43,10 +45,10 @@ entry:
 
 ;      CHECK: define void @test2(i8* %p) {
 ; CHECK-NEXT: entry:
-; CHECK-NEXT:   %0 = tail call i8* @objc_retain(i8* %p) nounwind
+; CHECK-NEXT:   %0 = tail call i8* @objc_retain(i8* %p) [[NUW]]
 ; CHECK-NEXT:   %tmp = load i8** @x, align 8
 ; CHECK-NEXT:   store volatile i8* %0, i8** @x, align 8
-; CHECK-NEXT:   tail call void @objc_release(i8* %tmp) nounwind
+; CHECK-NEXT:   tail call void @objc_release(i8* %tmp) [[NUW]]
 ; CHECK-NEXT:   ret void
 ; CHECK-NEXT: }
 define void @test2(i8* %p) {
@@ -57,3 +59,116 @@ entry:
   tail call void @objc_release(i8* %tmp) nounwind
   ret void
 }
+
+; 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: }
+define void @test3(i8* %newValue) {
+entry:
+  %x0 = tail call i8* @objc_retain(i8* %newValue) nounwind
+  %x1 = load i8** @x, align 8
+  store i8* %newValue, i8** @x, align 8
+  tail call void @use_pointer(i8* %x1), !clang.arc.no_objc_arc_exceptions !0
+  tail call void @objc_release(i8* %x1) nounwind, !clang.imprecise_release !0
+  ret void
+}
+
+; 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: }
+define i1 @test4(i8* %newValue, i8* %foo) {
+entry:
+  %x0 = tail call i8* @objc_retain(i8* %newValue) nounwind
+  %x1 = load i8** @x, align 8
+  store i8* %newValue, i8** @x, align 8
+  %t = icmp eq i8* %x1, %foo
+  tail call void @objc_release(i8* %x1) nounwind, !clang.imprecise_release !0
+  ret i1 %t
+}
+
+; Do form an objc_storeStrong here, because the use is before the store.
+
+; CHECK: 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: }
+define i1 @test5(i8* %newValue, i8* %foo) {
+entry:
+  %x0 = tail call i8* @objc_retain(i8* %newValue) nounwind
+  %x1 = load i8** @x, align 8
+  %t = icmp eq i8* %x1, %foo
+  store i8* %newValue, i8** @x, align 8
+  tail call void @objc_release(i8* %x1) nounwind, !clang.imprecise_release !0
+  ret i1 %t
+}
+
+; Like test5, but the release is before the store.
+
+; CHECK: 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: }
+define i1 @test6(i8* %newValue, i8* %foo) {
+entry:
+  %x0 = tail call i8* @objc_retain(i8* %newValue) nounwind
+  %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
+}
+
+; Like test0, but there's no store, so don't form an objc_storeStrong.
+
+;      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
+; CHECK-NEXT:   tail call void @objc_release(i8* %tmp) [[NUW]]
+; CHECK-NEXT:   ret void
+; CHECK-NEXT: }
+define void @test7(i8* %p) {
+entry:
+  %0 = tail call i8* @objc_retain(i8* %p) nounwind
+  %tmp = load i8** @x, align 8
+  tail call void @objc_release(i8* %tmp) nounwind
+  ret void
+}
+
+; Like test0, but there's no retain, so don't form an objc_storeStrong.
+
+;      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
+; CHECK-NEXT:   tail call void @objc_release(i8* %tmp) [[NUW]]
+; CHECK-NEXT:   ret void
+; CHECK-NEXT: }
+define void @test8(i8* %p) {
+entry:
+  %tmp = load i8** @x, align 8
+  store i8* %p, i8** @x, align 8
+  tail call void @objc_release(i8* %tmp) nounwind
+  ret void
+}
+
+!0 = metadata !{}
+
+; CHECK: attributes [[NUW]] = { nounwind }