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author | John McCall <rjmccall@apple.com> | 2011-06-15 23:02:42 +0000 |
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committer | John McCall <rjmccall@apple.com> | 2011-06-15 23:02:42 +0000 |
commit | 31168b077c3687bb79985102b08718cd77db353d (patch) | |
tree | 489434d90661950c25716a5db40be446d933c95c /clang/lib/Basic/Targets.cpp | |
parent | ce45f88e451387c46bfd6b53c75c7fa72b730ba1 (diff) | |
download | bcm5719-llvm-31168b077c3687bb79985102b08718cd77db353d.tar.gz bcm5719-llvm-31168b077c3687bb79985102b08718cd77db353d.zip |
Automatic Reference Counting.
Language-design credit goes to a lot of people, but I particularly want
to single out Blaine Garst and Patrick Beard for their contributions.
Compiler implementation credit goes to Argyrios, Doug, Fariborz, and myself,
in no particular order.
llvm-svn: 133103
Diffstat (limited to 'clang/lib/Basic/Targets.cpp')
-rw-r--r-- | clang/lib/Basic/Targets.cpp | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp index dd167dca47b..541a1ed5954 100644 --- a/clang/lib/Basic/Targets.cpp +++ b/clang/lib/Basic/Targets.cpp @@ -84,15 +84,35 @@ static void getDarwinDefines(MacroBuilder &Builder, const LangOptions &Opts, Builder.defineMacro("__MACH__"); Builder.defineMacro("OBJC_NEW_PROPERTIES"); - // __weak is always defined, for use in blocks and with objc pointers. - Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); - - // Darwin defines __strong even in C mode (just to nothing). - if (!Opts.ObjC1 || Opts.getGCMode() == LangOptions::NonGC) - Builder.defineMacro("__strong", ""); - else - Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); + if (Opts.ObjCAutoRefCount) { + Builder.defineMacro("__weak", "__attribute__((objc_lifetime(weak)))"); + Builder.defineMacro("__strong", "__attribute__((objc_lifetime(strong)))"); + Builder.defineMacro("__autoreleasing", + "__attribute__((objc_lifetime(autoreleasing)))"); + Builder.defineMacro("__unsafe_unretained", + "__attribute__((objc_lifetime(none)))"); + } else { + // __weak is always defined, for use in blocks and with objc pointers. + Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); + // Darwin defines __strong even in C mode (just to nothing). + if (Opts.getGCMode() != LangOptions::NonGC) + Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); + else + Builder.defineMacro("__strong", ""); + + // __unsafe_unretained is defined to nothing in non-ARC mode. We even + // allow this in C, since one might have block pointers in structs that + // are used in pure C code and in Objective-C ARC. + Builder.defineMacro("__unsafe_unretained", ""); + + // The Objective-C bridged cast keywords are defined to nothing in non-ARC + // mode; then they become normal, C-style casts. + Builder.defineMacro("__bridge", ""); + Builder.defineMacro("__bridge_transfer", ""); + Builder.defineMacro("__bridge_retained", ""); + } + if (Opts.Static) Builder.defineMacro("__STATIC__"); else |