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Author SHA1 Message Date
Dan Gohman 56e1cef705 Constant pointers to objects don't need reference counting. 
llvm-svn: 138242
 2011-08-22 17:29:11 +00:00
Dan Gohman bce94fded8 Make a few tests slightly more strict. 
llvm-svn: 138241
 2011-08-22 17:27:02 +00:00
Dan Gohman b38940135b Track a retain+release nesting level independently of the 
known-incremented level, because the two concepts can be used
to prove the saftey of a retain+release removal in different
ways.

llvm-svn: 138016
 2011-08-19 00:26:36 +00:00
John McCall d935e9c359 The ARC language-specific optimizer. Credit to Dan Gohman. 
llvm-svn: 133108
 2011-06-15 23:37:01 +00:00