Jakob Stoklund Olesen f9f1c7aa89 Break up getProfitableChainIncrement().
The required checks are moved to ChainInstruction() itself and the
policy decisions are moved to IVChain::isProfitableInc().

Also cache the ExprBase in IVChain to avoid frequent recomputations.

No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155676 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-26 23:33:11 +00:00
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2012-03-11 06:09:17 +00:00
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