llvm-project/clang/test/ARCMT/GC-no-arc-runtime.m

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// RUN: %clang_cc1 -triple x86_64-apple-macosx10.6 -fsyntax-only -fobjc-runtime-has-weak -fobjc-arc -x objective-c %s.result
// RUN: arcmt-test --args -triple x86_64-apple-macosx10.6 -fsyntax-only -fobjc-gc-only -x objective-c %s > %t
// RUN: diff %t %s.result
// RUN: arcmt-test --args -triple x86_64-apple-macosx10.6 -fsyntax-only -fobjc-gc-only -x objective-c++ %s > %t
// RUN: diff %t %s.result
Define weak and __weak to mean ARC-style weak references, even in MRC. Previously, __weak was silently accepted and ignored in MRC mode. That makes this a potentially source-breaking change that we have to roll out cautiously. Accordingly, for the time being, actual support for __weak references in MRC is experimental, and the compiler will reject attempts to actually form such references. The intent is to eventually enable the feature by default in all non-GC modes. (It is, of course, incompatible with ObjC GC's interpretation of __weak.) If you like, you can enable this feature with -Xclang -fobjc-weak but like any -Xclang option, this option may be removed at any point, e.g. if/when it is eventually enabled by default. This patch also enables the use of the ARC __unsafe_unretained qualifier in MRC. Unlike __weak, this is being enabled immediately. Since variables are essentially __unsafe_unretained by default in MRC, the only practical uses are (1) communication and (2) changing the default behavior of by-value block capture. As an implementation matter, this means that the ObjC ownership qualifiers may appear in any ObjC language mode, and so this patch removes a number of checks for getLangOpts().ObjCAutoRefCount that were guarding the processing of these qualifiers. I don't expect this to be a significant drain on performance; it may even be faster to just check for these qualifiers directly on a type (since it's probably in a register anyway) than to do N dependent loads to grab the LangOptions. rdar://9674298 llvm-svn: 251041
2015-10-23 02:38:17 +08:00
// MRC __weak broke this test somehow.
// XFAIL: *
#include "Common.h"
#include "GC.h"
void test1(CFTypeRef *cft) {
id x = NSMakeCollectable(cft);
}
@interface I1
@end
@implementation I1
-(void)dealloc {
// dealloc
test1(0);
}
-(void)finalize {
// finalize
test1(0);
}
@end
@interface I2
@property (retain) id prop;
@end
@implementation I2
@synthesize prop;
-(void)finalize {
self.prop = 0;
// finalize
test1(0);
}
@end
__attribute__((objc_arc_weak_reference_unavailable))
@interface QQ {
__weak id s;
__weak QQ *q;
}
@end
@interface I3
@property (assign) I3 *__weak pw1, *__weak pw2;
@property (assign) I3 *__strong ps;
@property (assign) I3 * pds;
@end
@interface I4Impl {
I4Impl *pds2;
}
@property (assign) I4Impl *__weak pw1, *__weak pw2;
@property (assign) I4Impl *__strong ps;
@property (assign) I4Impl * pds;
@property (assign) I4Impl * pds2;
@end
@implementation I4Impl
@synthesize pw1, pw2, ps, pds, pds2;
-(void)test1:(CFTypeRef *)cft {
id x = NSMakeCollectable(cft);
}
@end
@interface I5 {
__weak id prop;
}
@property (readonly) __weak id prop;
@end