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Author SHA1 Message Date
Lawrence Hu 1befea2bdc Reroll loops with multiple IV and negative step part 3 
support multiple induction variables

    This patch enable loop reroll for the following case:
        for(int i=0;  i<N; i += 2) {
           S += *a++;
           S += *a++;
        };

Differential Revision: http://reviews.llvm.org/D16550

llvm-svn: 268147
 2016-04-30 00:51:22 +00:00