Jakob Stoklund Olesen de0250728b Clean the sub-reg index composition maps at emission.
Preserve the Composites map in the CodeGenSubRegIndex class so it can be
used to determine which sub-register indices can actually be composed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163629 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-11 16:34:05 +00:00
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2012-07-27 06:44:02 +00:00