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* Reroll loops with multiple IV and negative step part 3Lawrence Hu2016-04-301-0/+134
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
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