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Author SHA1 Message Date
Tom Stellard d2e83929a9 R600: Set the noduplicate attribute on barrier() intrinsics 
This will prevent LLVM optimization passes from creating illegal uses
of the barrier() intrinsic (e.g. calling barrier() from a conditional
that is not executed by all threads).

llvm-svn: 193753
 2013-10-31 15:50:48 +00:00
Tom Stellard 3a81b5d083 Implement barrier() builtin 
Reviewed and Tested-by: Aaron Watry <awatry@gmail.com>

llvm-svn: 185837
 2013-07-08 17:26:39 +00:00