Guozhi Wei 31027cdf52 [PPC] Give unaligned memory access lower cost on processor that supports it
Newer ppc supports unaligned memory access, it reduces the cost of unaligned memory access significantly. This patch handles this case in PPCTTIImpl::getMemoryOpCost.

This patch fixes pr31492.

Differential Revision: https://reviews.llvm.org/D28630



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292680 91177308-0d34-0410-b5e6-96231b3b80d8
2017-01-20 23:35:27 +00:00
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