forked from OSchip/llvm-project
460ce58fa6
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 |
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| ARCMT | ||
| ASTMerge | ||
| Analysis | ||
| CXX | ||
| CodeCompletion | ||
| CodeGen | ||
| CodeGenCUDA | ||
| CodeGenCXX | ||
| CodeGenObjC | ||
| CodeGenObjCXX | ||
| CodeGenOpenCL | ||
| Coverage | ||
| CoverageMapping | ||
| Driver | ||
| FixIt | ||
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| Sema | ||
| SemaCUDA | ||
| SemaCXX | ||
| SemaObjC | ||
| SemaObjCXX | ||
| SemaOpenCL | ||
| SemaTemplate | ||
| TableGen | ||
| Tooling | ||
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| .clang-format | ||
| CMakeLists.txt | ||
| Makefile | ||
| TestRunner.sh | ||
| cxx-sections.data | ||
| lit.cfg | ||
| lit.site.cfg.in | ||
| make_test_dirs.pl | ||