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llvm-project/clang/test/CodeGenObjC/arc-unsafeclaim.m

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Emit calls to objc_unsafeClaimAutoreleasedReturnValue when reclaiming a call result in order to ignore it or assign it to an __unsafe_unretained variable. This avoids adding an unwanted retain/release pair when the return value is not actually returned autoreleased (e.g. when it is returned from a nonatomic getter or a typical collection accessor). This runtime function is only available on the latest Apple OS releases; the backwards-compatibility story is that you don't get the optimization unless your deployment target is recent enough. Sorry. rdar://20530049 llvm-svn: 258962
2016-01-28 02:32:30 +08:00
// Make sure it works on x86-64.
// RUN: %clang_cc1 -triple x86_64-apple-darwin11 -fobjc-runtime=macosx-10.11 -fobjc-arc -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-UNOPTIMIZED
[CodeGen][ObjC] Emit objc_unsafeClaimAutoreleasedReturnValue for fragile runtime too. Follow-up to r258962. rdar://problem/29269006 llvm-svn: 289615
2016-12-14 07:32:22 +08:00
// Make sure it works on x86-32.
// RUN: %clang_cc1 -triple i386-apple-darwin11 -fobjc-runtime=macosx-fragile-10.11 -fobjc-arc -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-UNOPTIMIZED -check-prefix=CHECK-MARKED
Emit calls to objc_unsafeClaimAutoreleasedReturnValue when reclaiming a call result in order to ignore it or assign it to an __unsafe_unretained variable. This avoids adding an unwanted retain/release pair when the return value is not actually returned autoreleased (e.g. when it is returned from a nonatomic getter or a typical collection accessor). This runtime function is only available on the latest Apple OS releases; the backwards-compatibility story is that you don't get the optimization unless your deployment target is recent enough. Sorry. rdar://20530049 llvm-svn: 258962
2016-01-28 02:32:30 +08:00
// Make sure it works on ARM.
// RUN: %clang_cc1 -triple arm64-apple-ios9 -fobjc-runtime=ios-9.0 -fobjc-arc -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-UNOPTIMIZED -check-prefix=CHECK-MARKED
Make '-disable-llvm-optzns' an alias for '-disable-llvm-passes'. Much to my surprise, '-disable-llvm-optzns' which I thought was the magical flag I wanted to get at the raw LLVM IR coming out of Clang deosn't do that. It still runs some passes over the IR. I don't want that, I really want the *raw* IR coming out of Clang and I strongly suspect everyone else using it is in the same camp. There is actually a flag that does what I want that I didn't know about called '-disable-llvm-passes'. I suspect many others don't know about it either. It both does what I want and is much simpler. This removes the confusing version and makes that spelling of the flag an alias for '-disable-llvm-passes'. I've also moved everything in Clang to use the 'passes' spelling as it seems both more accurate (*all* LLVM passes are disabled, not just optimizations) and much easier to remember and spell correctly. This is part of simplifying how Clang drives LLVM to make it cleaner to wire up to the new pass manager. Differential Revision: https://reviews.llvm.org/D28047 llvm-svn: 290392
2016-12-23 08:23:01 +08:00
// RUN: %clang_cc1 -triple arm64-apple-ios9 -fobjc-runtime=ios-9.0 -fobjc-arc -O -disable-llvm-passes -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-OPTIMIZED
Emit calls to objc_unsafeClaimAutoreleasedReturnValue when reclaiming a call result in order to ignore it or assign it to an __unsafe_unretained variable. This avoids adding an unwanted retain/release pair when the return value is not actually returned autoreleased (e.g. when it is returned from a nonatomic getter or a typical collection accessor). This runtime function is only available on the latest Apple OS releases; the backwards-compatibility story is that you don't get the optimization unless your deployment target is recent enough. Sorry. rdar://20530049 llvm-svn: 258962
2016-01-28 02:32:30 +08:00
// Make sure it works on ARM64.
// RUN: %clang_cc1 -triple armv7-apple-ios9 -fobjc-runtime=ios-9.0 -fobjc-arc -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-UNOPTIMIZED -check-prefix=CHECK-MARKED
Make '-disable-llvm-optzns' an alias for '-disable-llvm-passes'. Much to my surprise, '-disable-llvm-optzns' which I thought was the magical flag I wanted to get at the raw LLVM IR coming out of Clang deosn't do that. It still runs some passes over the IR. I don't want that, I really want the *raw* IR coming out of Clang and I strongly suspect everyone else using it is in the same camp. There is actually a flag that does what I want that I didn't know about called '-disable-llvm-passes'. I suspect many others don't know about it either. It both does what I want and is much simpler. This removes the confusing version and makes that spelling of the flag an alias for '-disable-llvm-passes'. I've also moved everything in Clang to use the 'passes' spelling as it seems both more accurate (*all* LLVM passes are disabled, not just optimizations) and much easier to remember and spell correctly. This is part of simplifying how Clang drives LLVM to make it cleaner to wire up to the new pass manager. Differential Revision: https://reviews.llvm.org/D28047 llvm-svn: 290392
2016-12-23 08:23:01 +08:00
// RUN: %clang_cc1 -triple armv7-apple-ios9 -fobjc-runtime=ios-9.0 -fobjc-arc -O -disable-llvm-passes -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-OPTIMIZED
Emit calls to objc_unsafeClaimAutoreleasedReturnValue when reclaiming a call result in order to ignore it or assign it to an __unsafe_unretained variable. This avoids adding an unwanted retain/release pair when the return value is not actually returned autoreleased (e.g. when it is returned from a nonatomic getter or a typical collection accessor). This runtime function is only available on the latest Apple OS releases; the backwards-compatibility story is that you don't get the optimization unless your deployment target is recent enough. Sorry. rdar://20530049 llvm-svn: 258962
2016-01-28 02:32:30 +08:00
// Make sure that it's implicitly disabled if the runtime version isn't high enough.
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fobjc-runtime=macosx-10.10 -fobjc-arc -emit-llvm -o - %s | FileCheck %s -check-prefix=DISABLED
// RUN: %clang_cc1 -triple arm64-apple-ios8 -fobjc-runtime=ios-8 -fobjc-arc -emit-llvm -o - %s | FileCheck %s -check-prefix=DISABLED -check-prefix=DISABLED-MARKED
@class A;
A *makeA(void);
void test_assign() {
__unsafe_unretained id x;
x = makeA();
}
// CHECK-LABEL: define void @test_assign()
// CHECK: [[X:%.*]] = alloca i8*
// CHECK: [[T0:%.*]] = call [[A:.*]]* @makeA()
// CHECK-MARKED-NEXT: call void asm sideeffect
// CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_unsafeClaimAutoreleasedReturnValue(i8* [[T1]])
// CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to [[A]]*
// CHECK-NEXT: [[T4:%.*]] = bitcast [[A]]* [[T3]] to i8*
// CHECK-NEXT: store i8* [[T4]], i8** [[X]]
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-NEXT: ret void
// DISABLED-LABEL: define void @test_assign()
// DISABLED: [[T0:%.*]] = call [[A:.*]]* @makeA()
// DISABLED-MARKED-NEXT: call void asm sideeffect
// DISABLED-NEXT: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
// DISABLED-NEXT: [[T2:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T1]])
void test_assign_assign() {
__unsafe_unretained id x, y;
x = y = makeA();
}
// CHECK-LABEL: define void @test_assign_assign()
// CHECK: [[X:%.*]] = alloca i8*
// CHECK: [[Y:%.*]] = alloca i8*
// CHECK: [[T0:%.*]] = call [[A]]* @makeA()
// CHECK-MARKED-NEXT: call void asm sideeffect
// CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_unsafeClaimAutoreleasedReturnValue(i8* [[T1]])
// CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to [[A]]*
// CHECK-NEXT: [[T4:%.*]] = bitcast [[A]]* [[T3]] to i8*
// CHECK-NEXT: store i8* [[T4]], i8** [[Y]]
// CHECK-NEXT: store i8* [[T4]], i8** [[X]]
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-NEXT: ret void
void test_strong_assign_assign() {
__strong id x;
__unsafe_unretained id y;
x = y = makeA();
}
// CHECK-LABEL: define void @test_strong_assign_assign()
// CHECK: [[X:%.*]] = alloca i8*
// CHECK: [[Y:%.*]] = alloca i8*
// CHECK: [[T0:%.*]] = call [[A]]* @makeA()
// CHECK-MARKED-NEXT: call void asm sideeffect
// CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T1]])
// CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to [[A]]*
// CHECK-NEXT: [[T4:%.*]] = bitcast [[A]]* [[T3]] to i8*
// CHECK-NEXT: store i8* [[T4]], i8** [[Y]]
// CHECK-NEXT: [[OLD:%.*]] = load i8*, i8** [[X]]
// CHECK-NEXT: store i8* [[T4]], i8** [[X]]
// CHECK-NEXT: call void @objc_release(i8* [[OLD]]
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-UNOPTIMIZED-NEXT: call void @objc_storeStrong(i8** [[X]], i8* null)
// CHECK-OPTIMIZED-NEXT: [[T0:%.*]] = load i8*, i8** [[X]]
// CHECK-OPTIMIZED-NEXT: call void @objc_release(i8* [[T0]])
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-NEXT: ret void
void test_assign_strong_assign() {
__unsafe_unretained id x;
__strong id y;
x = y = makeA();
}
// CHECK-LABEL: define void @test_assign_strong_assign()
// CHECK: [[X:%.*]] = alloca i8*
// CHECK: [[Y:%.*]] = alloca i8*
// CHECK: [[T0:%.*]] = call [[A]]* @makeA()
// CHECK-MARKED-NEXT: call void asm sideeffect
// CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T1]])
// CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to [[A]]*
// CHECK-NEXT: [[T4:%.*]] = bitcast [[A]]* [[T3]] to i8*
// CHECK-NEXT: [[OLD:%.*]] = load i8*, i8** [[Y]]
// CHECK-NEXT: store i8* [[T4]], i8** [[Y]]
// CHECK-NEXT: call void @objc_release(i8* [[OLD]]
// CHECK-NEXT: store i8* [[T4]], i8** [[X]]
// CHECK-UNOPTIMIZED-NEXT: call void @objc_storeStrong(i8** [[Y]], i8* null)
// CHECK-OPTIMIZED-NEXT: [[T0:%.*]] = load i8*, i8** [[Y]]
// CHECK-OPTIMIZED-NEXT: call void @objc_release(i8* [[T0]])
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-NEXT: ret void
void test_init() {
__unsafe_unretained id x = makeA();
}
// CHECK-LABEL: define void @test_init()
// CHECK: [[X:%.*]] = alloca i8*
// CHECK: [[T0:%.*]] = call [[A]]* @makeA()
// CHECK-MARKED-NEXT: call void asm sideeffect
// CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_unsafeClaimAutoreleasedReturnValue(i8* [[T1]])
// CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to [[A]]*
// CHECK-NEXT: [[T4:%.*]] = bitcast [[A]]* [[T3]] to i8*
// CHECK-NEXT: store i8* [[T4]], i8** [[X]]
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-NEXT: ret void
void test_init_assignment() {
__unsafe_unretained id x;
__unsafe_unretained id y = x = makeA();
}
// CHECK-LABEL: define void @test_init_assignment()
// CHECK: [[X:%.*]] = alloca i8*
// CHECK: [[Y:%.*]] = alloca i8*
// CHECK: [[T0:%.*]] = call [[A]]* @makeA()
// CHECK-MARKED-NEXT: call void asm sideeffect
// CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_unsafeClaimAutoreleasedReturnValue(i8* [[T1]])
// CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to [[A]]*
// CHECK-NEXT: [[T4:%.*]] = bitcast [[A]]* [[T3]] to i8*
// CHECK-NEXT: store i8* [[T4]], i8** [[X]]
// CHECK-NEXT: store i8* [[T4]], i8** [[Y]]
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-NEXT: ret void
void test_strong_init_assignment() {
__unsafe_unretained id x;
__strong id y = x = makeA();
}
// CHECK-LABEL: define void @test_strong_init_assignment()
// CHECK: [[X:%.*]] = alloca i8*
// CHECK: [[Y:%.*]] = alloca i8*
// CHECK: [[T0:%.*]] = call [[A]]* @makeA()
// CHECK-MARKED-NEXT: call void asm sideeffect
// CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T1]])
// CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to [[A]]*
// CHECK-NEXT: [[T4:%.*]] = bitcast [[A]]* [[T3]] to i8*
// CHECK-NEXT: store i8* [[T4]], i8** [[X]]
// CHECK-NEXT: store i8* [[T4]], i8** [[Y]]
// CHECK-UNOPTIMIZED-NEXT: call void @objc_storeStrong(i8** [[Y]], i8* null)
// CHECK-OPTIMIZED-NEXT: [[T0:%.*]] = load i8*, i8** [[Y]]
// CHECK-OPTIMIZED-NEXT: call void @objc_release(i8* [[T0]])
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-NEXT: ret void
void test_init_strong_assignment() {
__strong id x;
__unsafe_unretained id y = x = makeA();
}
// CHECK-LABEL: define void @test_init_strong_assignment()
// CHECK: [[X:%.*]] = alloca i8*
// CHECK: [[Y:%.*]] = alloca i8*
// CHECK: [[T0:%.*]] = call [[A]]* @makeA()
// CHECK-MARKED-NEXT: call void asm sideeffect
// CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[T1]])
// CHECK-NEXT: [[T3:%.*]] = bitcast i8* [[T2]] to [[A]]*
// CHECK-NEXT: [[T4:%.*]] = bitcast [[A]]* [[T3]] to i8*
// CHECK-NEXT: [[OLD:%.*]] = load i8*, i8** [[X]]
// CHECK-NEXT: store i8* [[T4]], i8** [[X]]
// CHECK-NEXT: call void @objc_release(i8* [[OLD]])
// CHECK-NEXT: store i8* [[T4]], i8** [[Y]]
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-UNOPTIMIZED-NEXT: call void @objc_storeStrong(i8** [[X]], i8* null)
// CHECK-OPTIMIZED-NEXT: [[T0:%.*]] = load i8*, i8** [[X]]
// CHECK-OPTIMIZED-NEXT: call void @objc_release(i8* [[T0]])
// CHECK-OPTIMIZED-NEXT: bitcast
// CHECK-OPTIMIZED-NEXT: lifetime.end
// CHECK-NEXT: ret void
void test_ignored() {
makeA();
}
// CHECK-LABEL: define void @test_ignored()
// CHECK: [[T0:%.*]] = call [[A]]* @makeA()
// CHECK-MARKED-NEXT: call void asm sideeffect
// CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_unsafeClaimAutoreleasedReturnValue(i8* [[T1]])
// CHECK-NEXT: bitcast i8* [[T2]] to [[A]]*
// CHECK-NEXT: ret void
void test_cast_to_void() {
(void) makeA();
}
// CHECK-LABEL: define void @test_cast_to_void()
// CHECK: [[T0:%.*]] = call [[A]]* @makeA()
// CHECK-MARKED-NEXT: call void asm sideeffect
// CHECK-NEXT: [[T1:%.*]] = bitcast [[A]]* [[T0]] to i8*
// CHECK-NEXT: [[T2:%.*]] = call i8* @objc_unsafeClaimAutoreleasedReturnValue(i8* [[T1]])
// CHECK-NEXT: bitcast i8* [[T2]] to [[A]]*
// CHECK-NEXT: ret void
// This is always at the end of the module.
// CHECK-OPTIMIZED: !clang.arc.retainAutoreleasedReturnValueMarker = !{!0}