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llvm-project/clang/test/CodeGenObjC/availability-cf-link-guard.m

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[CodeGen] Emit a CoreFoundation link guard when @available is used After r297760, __isOSVersionAtLeast in compiler-rt loads the CoreFoundation symbols at runtime. This means that `@available` will always fail when used in a binary without a linked CoreFoundation. This commit forces Clang to emit a reference to a CoreFoundation symbol when `@available` is used to ensure that linking will fail when CoreFoundation isn't linked with the build product. rdar://31039592 Differential Revision: https://reviews.llvm.org/D30977 llvm-svn: 298588
2017-03-23 19:14:27 +08:00
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.11 -emit-llvm -o - %s | FileCheck --check-prefixes=CHECK,CHECK_LINK_OPT %s
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.11 -emit-llvm -o - -D USE_BUILTIN %s | FileCheck --check-prefixes=CHECK,CHECK_LINK_OPT %s
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.11 -emit-llvm -o - -D DEF_CF %s | FileCheck --check-prefixes=CHECK_CF,CHECK_LINK_OPT %s
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.12 -emit-llvm -o - %s | FileCheck --check-prefix=CHECK_NO_GUARD %s
// RUN: %clang_cc1 -triple x86_64-unknown-linux -emit-llvm -o - %s | FileCheck --check-prefix=CHECK_NO_GUARD %s
#ifdef DEF_CF
struct CFBundle;
typedef struct CFBundle *CFBundleRef;
unsigned CFBundleGetVersionNumber(CFBundleRef bundle);
// CHECK_CF: declare i32 @CFBundleGetVersionNumber(%struct.CFBundle*)
// CHECK_CF: @__clang_at_available_requires_core_foundation_framework
// CHECK_CF-NEXT: call {{.*}}@CFBundleGetVersionNumber
#endif
void use_at_available() {
#ifdef DEF_CF
CFBundleGetVersionNumber(0);
#endif
#ifdef USE_BUILTIN
if (__builtin_available(macos 10.12, *))
;
#else
if (@available(macos 10.12, *))
;
#endif
}
// CHECK: @llvm.compiler.used{{.*}}@__clang_at_available_requires_core_foundation_framework
// CHECK: declare i32 @CFBundleGetVersionNumber(i8*)
// CHECK-LABEL: linkonce hidden void @__clang_at_available_requires_core_foundation_framework
// CHECK: call i32 @CFBundleGetVersionNumber(i8* null)
// CHECK-NEXT: unreachable
// CHECK_NO_GUARD-NOT: __clang_at_available_requires_core_foundation_framework
// CHECK_NO_GUARD-NOT: CFBundleGetVersionNumber
IR: Replace the "Linker Options" module flag with "llvm.linker.options" named metadata. The new metadata is easier to manipulate than module flags. Differential Revision: https://reviews.llvm.org/D31349 llvm-svn: 305227
2017-06-13 04:10:48 +08:00
// CHECK_LINK_OPT: !llvm.linker.options = !{![[FRAMEWORK:[0-9]+]]
[CodeGen] Emit a CoreFoundation link guard when @available is used After r297760, __isOSVersionAtLeast in compiler-rt loads the CoreFoundation symbols at runtime. This means that `@available` will always fail when used in a binary without a linked CoreFoundation. This commit forces Clang to emit a reference to a CoreFoundation symbol when `@available` is used to ensure that linking will fail when CoreFoundation isn't linked with the build product. rdar://31039592 Differential Revision: https://reviews.llvm.org/D30977 llvm-svn: 298588
2017-03-23 19:14:27 +08:00
// CHECK_LINK_OPT: ![[FRAMEWORK]] = !{!"-framework", !"CoreFoundation"}
IR: Replace the "Linker Options" module flag with "llvm.linker.options" named metadata. The new metadata is easier to manipulate than module flags. Differential Revision: https://reviews.llvm.org/D31349 llvm-svn: 305227
2017-06-13 04:10:48 +08:00
// CHECK_NO_GUARD-NOT: !llvm.linker.options
[CodeGen] Emit a CoreFoundation link guard when @available is used After r297760, __isOSVersionAtLeast in compiler-rt loads the CoreFoundation symbols at runtime. This means that `@available` will always fail when used in a binary without a linked CoreFoundation. This commit forces Clang to emit a reference to a CoreFoundation symbol when `@available` is used to ensure that linking will fail when CoreFoundation isn't linked with the build product. rdar://31039592 Differential Revision: https://reviews.llvm.org/D30977 llvm-svn: 298588
2017-03-23 19:14:27 +08:00
// CHECK_NO_GUARD-NOT: CoreFoundation