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c3a3d1596a
Loop Idiom Recognize Pass (LIRP) attempts to transform loops with subscripted arrays into memcpy/memset function calls. In some particular situation, this transformation introduces negative impacts. For example: https://bugs.llvm.org/show_bug.cgi?id=47300 This patch will enable users to disable a particular part of the transformation, while he/she can still enjoy the benefit brought about by the rest of LIRP. The default behavior stays unchanged: no part of LIRP is disabled by default. Reviewed By: etiotto (Ettore Tiotto) Differential Revision: https://reviews.llvm.org/D86262