diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/ObjCARC/allocas.ll | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/test/Transforms/ObjCARC/allocas.ll b/test/Transforms/ObjCARC/allocas.ll new file mode 100644 index 0000000000..eabd54deb7 --- /dev/null +++ b/test/Transforms/ObjCARC/allocas.ll @@ -0,0 +1,203 @@ +; RUN: opt -objc-arc -S < %s | FileCheck %s + +declare i8* @objc_retain(i8*) +declare i8* @objc_retainAutoreleasedReturnValue(i8*) +declare void @objc_release(i8*) +declare i8* @objc_autorelease(i8*) +declare i8* @objc_autoreleaseReturnValue(i8*) +declare void @objc_autoreleasePoolPop(i8*) +declare i8* @objc_autoreleasePoolPush() +declare i8* @objc_retainBlock(i8*) + +declare i8* @objc_retainedObject(i8*) +declare i8* @objc_unretainedObject(i8*) +declare i8* @objc_unretainedPointer(i8*) + +declare void @use_pointer(i8*) +declare void @callee() +declare void @callee_fnptr(void ()*) +declare void @invokee() +declare i8* @returner() +declare void @bar(i32 ()*) +declare void @use_alloca(i8**) + +declare void @llvm.dbg.value(metadata, i64, metadata) + +declare i8* @objc_msgSend(i8*, i8*, ...) + + +; In the presense of allocas, unconditionally remove retain/release pairs only +; if they are known safe in both directions. This prevents matching up an inner +; retain with the boundary guarding release in the following situation: +; +; %A = alloca +; retain(%x) +; retain(%x) <--- Inner Retain +; store %x, %A +; %y = load %A +; ... DO STUFF ... +; release(%y) +; release(%x) <--- Guarding Release +; +; rdar://13750319 + +; CHECK: define void @test1a(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_release(i8* %y) +; CHECK: @objc_release(i8* %x) +; CHECK: ret void +; CHECK: } +define void @test1a(i8* %x) { +entry: + %A = alloca i8* + tail call i8* @objc_retain(i8* %x) + tail call i8* @objc_retain(i8* %x) + store i8* %x, i8** %A, align 8 + %y = load i8** %A + call void @use_alloca(i8** %A) + call void @objc_release(i8* %y), !clang.imprecise_release !0 + call void @use_pointer(i8* %x) + call void @objc_release(i8* %x), !clang.imprecise_release !0 + ret void +} + +; CHECK: define void @test1b(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_release(i8* %y) +; CHECK: @objc_release(i8* %x) +; CHECK: ret void +; CHECK: } +define void @test1b(i8* %x) { +entry: + %A = alloca i8* + %gep = getelementptr i8** %A, i32 0 + tail call i8* @objc_retain(i8* %x) + tail call i8* @objc_retain(i8* %x) + store i8* %x, i8** %gep, align 8 + %y = load i8** %A + call void @use_alloca(i8** %A) + call void @objc_release(i8* %y), !clang.imprecise_release !0 + call void @use_pointer(i8* %x) + call void @objc_release(i8* %x), !clang.imprecise_release !0 + ret void +} + + +; CHECK: define void @test1c(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_release(i8* %y) +; CHECK: @objc_release(i8* %x) +; CHECK: ret void +; CHECK: } +define void @test1c(i8* %x) { +entry: + %A = alloca i8*, i32 3 + %gep = getelementptr i8** %A, i32 2 + tail call i8* @objc_retain(i8* %x) + tail call i8* @objc_retain(i8* %x) + store i8* %x, i8** %gep, align 8 + %y = load i8** %gep + call void @use_alloca(i8** %A) + call void @objc_release(i8* %y), !clang.imprecise_release !0 + call void @use_pointer(i8* %x) + call void @objc_release(i8* %x), !clang.imprecise_release !0 + ret void +} + + +; CHECK: define void @test1d(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_release(i8* %y) +; CHECK: @objc_release(i8* %x) +; CHECK: ret void +; CHECK: } +define void @test1d(i8* %x) { +entry: + br i1 undef, label %use_allocaA, label %use_allocaB + +use_allocaA: + %allocaA = alloca i8* + br label %exit + +use_allocaB: + %allocaB = alloca i8* + br label %exit + +exit: + %A = phi i8** [ %allocaA, %use_allocaA ], [ %allocaB, %use_allocaB ] + %gep = getelementptr i8** %A, i32 0 + tail call i8* @objc_retain(i8* %x) + tail call i8* @objc_retain(i8* %x) + store i8* %x, i8** %gep, align 8 + %y = load i8** %gep + call void @use_alloca(i8** %A) + call void @objc_release(i8* %y), !clang.imprecise_release !0 + call void @use_pointer(i8* %x) + call void @objc_release(i8* %x), !clang.imprecise_release !0 + ret void +} + +; CHECK: define void @test1e(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_release(i8* %y) +; CHECK: @objc_release(i8* %x) +; CHECK: ret void +; CHECK: } +define void @test1e(i8* %x) { +entry: + br i1 undef, label %use_allocaA, label %use_allocaB + +use_allocaA: + %allocaA = alloca i8*, i32 4 + br label %exit + +use_allocaB: + %allocaB = alloca i8*, i32 4 + br label %exit + +exit: + %A = phi i8** [ %allocaA, %use_allocaA ], [ %allocaB, %use_allocaB ] + %gep = getelementptr i8** %A, i32 2 + tail call i8* @objc_retain(i8* %x) + tail call i8* @objc_retain(i8* %x) + store i8* %x, i8** %gep, align 8 + %y = load i8** %gep + call void @use_alloca(i8** %A) + call void @objc_release(i8* %y), !clang.imprecise_release !0 + call void @use_pointer(i8* %x) + call void @objc_release(i8* %x), !clang.imprecise_release !0 + ret void +} + +; CHECK: define void @test1f(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_retain(i8* %x) +; CHECK: @objc_release(i8* %y) +; CHECK: @objc_release(i8* %x) +; CHECK: ret void +; CHECK: } +define void @test1f(i8* %x) { +entry: + %allocaOne = alloca i8* + %allocaTwo = alloca i8* + %A = select i1 undef, i8** %allocaOne, i8** %allocaTwo + tail call i8* @objc_retain(i8* %x) + tail call i8* @objc_retain(i8* %x) + store i8* %x, i8** %A, align 8 + %y = load i8** %A + call void @use_alloca(i8** %A) + call void @objc_release(i8* %y), !clang.imprecise_release !0 + call void @use_pointer(i8* %x) + call void @objc_release(i8* %x), !clang.imprecise_release !0 + ret void +} + + +!0 = metadata !{} + +declare i32 @__gxx_personality_v0(...) |