Chandler Carruth 2e38cf961d Introduce a loop block rotation optimization to the new block placement ... pass. This is designed to achieve one of the important optimizations that the old code placement pass did, but more simply. This is a somewhat rough and *very* conservative version of the transform. We could get a lot fancier here if there are profitable cases to do so. In particular, this only looks for a single pattern, it insists that the loop backedge being rotated away is the last backedge in the chain, and it doesn't provide any means of doing better in-loop placement due to the rotation. However, it appears that it will handle the important loops I am finding in the LLVM test suite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145158 91177308-0d34-0410-b5e6-96231b3b80d8		2011-11-27 00:38:03 +00:00
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CodeGen	Introduce a loop block rotation optimization to the new block placement	2011-11-27 00:38:03 +00:00
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MC	This patch contains support for encoding FMA4 instructions and	2011-11-25 19:33:42 +00:00
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Transforms	FileCheck-ize this test and make it more precise. This is in preparation	2011-11-26 08:24:25 +00:00
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