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3 Commits

Author SHA1 Message Date
Dan Gohman 121302772d Don't let arbitrary calls disrupt nested retain+release pairs if 
the retains and releases all use the same SSA pointer value.

Also, don't let CFG hazards disrupt nested retain+release pair
optimizations.

llvm-svn: 137399
 2011-08-12 00:26:31 +00:00
Dan Gohman b24a1d29cb Tidy up these testcases to look more like real code does. 
llvm-svn: 137085
 2011-08-09 00:33:11 +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