Merging r181580:

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r181580 | tstellar | 2013-05-09 19:09:45 -0700 (Thu, 09 May 2013) | 10 lines

R600: Remove AMDILPeeopholeOptimizer and replace optimizations with tablegen patterns

The BFE optimization was the only one we were actually using, and it was
emitting an intrinsic that we don't support.

https://bugs.freedesktop.org/show_bug.cgi?id=64201



Reviewed-by: Christian König <christian.koenig@amd.com>

NOTE: This is a candidate for the 3.3 branch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_33@181954 91177308-0d34-0410-b5e6-96231b3b80d8