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LSR always tries to make the ICmp in the loop latch use the incremented induction variable. This allows the induction variable to be kept in a single register. When the induction variable limit is equal to the stride, SimplifySetCC() would break LSR's hard work by transforming: (icmp (add iv, stride), stride) --> (cmp iv, 0) This forced us to use lea for the IC update, preventing the simpler incl+cmp. <rdar://problem/7643606> <rdar://problem/11184260> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154119 91177308-0d34-0410-b5e6-96231b3b80d8
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