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llvm-project/clang/test/CodeGenObjC/externally-retained.m

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Change filecheck default to dump input on failure Having the input dumped on failure seems like a better default: I debugged FileCheck tests for a while without knowing about this option, which really helps to understand failures. Remove `-dump-input-on-failure` and the environment variable FILECHECK_DUMP_INPUT_ON_FAILURE which are now obsolete. Differential Revision: https://reviews.llvm.org/D81422
2020-03-28 07:58:06 +08:00
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.13.0 -fobjc-arc -fblocks -Wno-objc-root-class -O0 %s -S -emit-llvm -o - | FileCheck %s
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.13.0 -fobjc-arc -fblocks -Wno-objc-root-class -O0 -xobjective-c++ -std=c++11 %s -S -emit-llvm -o - | FileCheck %s --check-prefix CHECKXX
[ObjCARC] Add an new attribute, objc_externally_retained This attribute, called "objc_externally_retained", exposes clang's notion of pseudo-__strong variables in ARC. Pseudo-strong variables "borrow" their initializer, meaning that they don't retain/release it, instead assuming that someone else is keeping their value alive. If a function is annotated with this attribute, implicitly strong parameters of that function aren't implicitly retained/released in the function body, and are implicitly const. This is useful to expose for performance reasons, most functions don't need the extra safety of the retain/release, so programmers can opt out as needed. This attribute can also apply to declarations of local variables, with similar effect. Differential revision: https://reviews.llvm.org/D55865 llvm-svn: 350422
2019-01-05 02:33:06 +08:00
#define EXT_RET __attribute__((objc_externally_retained))
@interface ObjTy @end
ObjTy *global;
#if __cplusplus
// Suppress name mangling in C++ mode for the sake of check lines.
extern "C" void param(ObjTy *p);
extern "C" void local();
extern "C" void in_init();
extern "C" void anchor();
extern "C" void block_capture(ObjTy *);
extern "C" void esc(void (^)());
extern "C" void escp(void (^)(ObjTy *));
extern "C" void block_param();
#endif
void param(ObjTy *p) EXT_RET {
[test] Add {{.*}} to make tests immune to dso_local/dso_preemptable/(none) differences For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie and COFF, but not for Mach-O. This nuance causes unneeded binary format differences. This patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} ` if there is an explicit linkage. * Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar. * Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
2020-12-31 12:45:56 +08:00
// CHECK-LABEL: define{{.*}} void @param
[ObjCARC] Add an new attribute, objc_externally_retained This attribute, called "objc_externally_retained", exposes clang's notion of pseudo-__strong variables in ARC. Pseudo-strong variables "borrow" their initializer, meaning that they don't retain/release it, instead assuming that someone else is keeping their value alive. If a function is annotated with this attribute, implicitly strong parameters of that function aren't implicitly retained/released in the function body, and are implicitly const. This is useful to expose for performance reasons, most functions don't need the extra safety of the retain/release, so programmers can opt out as needed. This attribute can also apply to declarations of local variables, with similar effect. Differential revision: https://reviews.llvm.org/D55865 llvm-svn: 350422
2019-01-05 02:33:06 +08:00
// CHECK-NOT: llvm.objc.
NFC: Unforget a colon in a few CHECK: directives. Differential Revision: https://reviews.llvm.org/D64526 llvm-svn: 365863
2019-07-12 10:16:56 +08:00
// CHECK: ret
[ObjCARC] Add an new attribute, objc_externally_retained This attribute, called "objc_externally_retained", exposes clang's notion of pseudo-__strong variables in ARC. Pseudo-strong variables "borrow" their initializer, meaning that they don't retain/release it, instead assuming that someone else is keeping their value alive. If a function is annotated with this attribute, implicitly strong parameters of that function aren't implicitly retained/released in the function body, and are implicitly const. This is useful to expose for performance reasons, most functions don't need the extra safety of the retain/release, so programmers can opt out as needed. This attribute can also apply to declarations of local variables, with similar effect. Differential revision: https://reviews.llvm.org/D55865 llvm-svn: 350422
2019-01-05 02:33:06 +08:00
}
void local() {
EXT_RET ObjTy *local = global;
[test] Add {{.*}} to make tests immune to dso_local/dso_preemptable/(none) differences For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie and COFF, but not for Mach-O. This nuance causes unneeded binary format differences. This patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} ` if there is an explicit linkage. * Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar. * Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
2020-12-31 12:45:56 +08:00
// CHECK-LABEL: define{{.*}} void @local
[ObjCARC] Add an new attribute, objc_externally_retained This attribute, called "objc_externally_retained", exposes clang's notion of pseudo-__strong variables in ARC. Pseudo-strong variables "borrow" their initializer, meaning that they don't retain/release it, instead assuming that someone else is keeping their value alive. If a function is annotated with this attribute, implicitly strong parameters of that function aren't implicitly retained/released in the function body, and are implicitly const. This is useful to expose for performance reasons, most functions don't need the extra safety of the retain/release, so programmers can opt out as needed. This attribute can also apply to declarations of local variables, with similar effect. Differential revision: https://reviews.llvm.org/D55865 llvm-svn: 350422
2019-01-05 02:33:06 +08:00
// CHECK-NOT: llvm.objc.
// CHECK: ret
}
void in_init() {
// Test that we do the right thing when a variable appears in it's own
// initializer. Here, we release the value stored in 'wat' after overwriting
// it, in case it was somehow set to point to a non-null object while it's
// initializer is being evaluated.
EXT_RET ObjTy *wat = 0 ? wat : global;
[test] Add {{.*}} to make tests immune to dso_local/dso_preemptable/(none) differences For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie and COFF, but not for Mach-O. This nuance causes unneeded binary format differences. This patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} ` if there is an explicit linkage. * Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar. * Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
2020-12-31 12:45:56 +08:00
// CHECK-LABEL: define{{.*}} void @in_init
[ObjCARC] Add an new attribute, objc_externally_retained This attribute, called "objc_externally_retained", exposes clang's notion of pseudo-__strong variables in ARC. Pseudo-strong variables "borrow" their initializer, meaning that they don't retain/release it, instead assuming that someone else is keeping their value alive. If a function is annotated with this attribute, implicitly strong parameters of that function aren't implicitly retained/released in the function body, and are implicitly const. This is useful to expose for performance reasons, most functions don't need the extra safety of the retain/release, so programmers can opt out as needed. This attribute can also apply to declarations of local variables, with similar effect. Differential revision: https://reviews.llvm.org/D55865 llvm-svn: 350422
2019-01-05 02:33:06 +08:00
// CHECK: [[WAT:%.*]] = alloca
// CHECK-NEXT: store {{.*}} null, {{.*}} [[WAT]]
// CHECK-NEXT: [[GLOBAL:%.*]] = load {{.*}} @global
// CHECK-NEXT: [[WAT_LOAD:%.*]] = load {{.*}} [[WAT]]
// CHECK-NEXT: store {{.*}} [[GLOBAL]], {{.*}} [[WAT]]
// CHECK-NEXT: [[CASTED:%.*]] = bitcast {{.*}} [[WAT_LOAD]] to
// CHECK-NEXT: call void @llvm.objc.release(i8* [[CASTED]])
// CHECK-NOT: llvm.objc.
// CHECK: ret
}
void esc(void (^)());
void block_capture(ObjTy *obj) EXT_RET {
esc(^{ (void)obj; });
[test] Add {{.*}} to make tests immune to dso_local/dso_preemptable/(none) differences For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie and COFF, but not for Mach-O. This nuance causes unneeded binary format differences. This patch replaces (function) `define ` with `define{{.*}} `, (variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} ` if there is an explicit linkage. * Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar. * Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
2020-12-31 12:45:56 +08:00
// CHECK-LABEL: define{{.*}} void @block_capture
[ObjCARC] Add an new attribute, objc_externally_retained This attribute, called "objc_externally_retained", exposes clang's notion of pseudo-__strong variables in ARC. Pseudo-strong variables "borrow" their initializer, meaning that they don't retain/release it, instead assuming that someone else is keeping their value alive. If a function is annotated with this attribute, implicitly strong parameters of that function aren't implicitly retained/released in the function body, and are implicitly const. This is useful to expose for performance reasons, most functions don't need the extra safety of the retain/release, so programmers can opt out as needed. This attribute can also apply to declarations of local variables, with similar effect. Differential revision: https://reviews.llvm.org/D55865 llvm-svn: 350422
2019-01-05 02:33:06 +08:00
// CHECK-NOT: llvm.objc.
// CHECK: call i8* @llvm.objc.retain
// CHECK-NOT: llvm.objc.
// CHECK: call void @esc
// CHECK-NOT: llvm.objc.
// CHECK: call void @llvm.objc.storeStrong({{.*}} null)
// CHECK-NOT: llvm.objc.
// CHECK: ret
// CHECK-LABEL: define {{.*}} void @__copy_helper_block_
// CHECK-NOT: llvm.objc.
// CHECK: llvm.objc.storeStrong
// CHECK-NOT: llvm.objc.
// CHECK: ret
// CHECK-LABEL: define {{.*}} void @__destroy_helper_block_
// CHECK-NOT: llvm.objc.
// CHECK: llvm.objc.storeStrong({{.*}} null)
// CHECK-NOT: llvm.objc.
// CHECK: ret
}
void escp(void (^)(ObjTy *));
void block_param() {
escp(^(ObjTy *p) EXT_RET {});
// CHECK-LABEL: define internal void @__block_param_block_invoke
// CHECK-NOT: llvm.objc.
// CHECK: ret
}
@interface Inter
-(void)m1: (ObjTy *)w;
@end
@implementation Inter
-(void)m1: (ObjTy *) w EXT_RET {
// CHECK-LABEL: define internal void @"\01-[Inter m1:]"
// CHECK-NOT: llvm.objc.
// CHECK: ret
}
-(void)m2: (ObjTy *) w EXT_RET {
// CHECK-LABEL: define internal void @"\01-[Inter m2:]"
// CHECK-NOT: llvm.objc.
// CHECK: ret
}
@end
#if __cplusplus
// Verify that the decltype(p) is resolved before 'p' is made implicitly const.
__attribute__((objc_externally_retained))
void foo(ObjTy *p, decltype(p) *) {}
// CHECKXX: _Z3fooP5ObjTyPU8__strongS0_
#endif