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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| .. | ||
| CMakeLists.txt | ||
| HeaderMap.cpp | ||
| HeaderSearch.cpp | ||
| Lexer.cpp | ||
| LiteralSupport.cpp | ||
| MacroArgs.cpp | ||
| MacroInfo.cpp | ||
| Makefile | ||
| ModuleMap.cpp | ||
| PPCaching.cpp | ||
| PPCallbacks.cpp | ||
| PPConditionalDirectiveRecord.cpp | ||
| PPDirectives.cpp | ||
| PPExpressions.cpp | ||
| PPLexerChange.cpp | ||
| PPMacroExpansion.cpp | ||
| PTHLexer.cpp | ||
| Pragma.cpp | ||
| PreprocessingRecord.cpp | ||
| Preprocessor.cpp | ||
| PreprocessorLexer.cpp | ||
| ScratchBuffer.cpp | ||
| TokenConcatenation.cpp | ||
| TokenLexer.cpp | ||
| UnicodeCharSets.h | ||