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Commit c90abc89 authored by Jakob Stoklund Olesen's avatar Jakob Stoklund Olesen
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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.

llvm-svn: 155676
parent a0337d7b
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