https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84309
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Tue Feb 13 08:34:42 2018 New Revision: 257617 URL: https://gcc.gnu.org/viewcvs?rev=257617&root=gcc&view=rev Log: PR middle-end/84309 * match.pd (pow(C,x) -> exp(log(C)*x)): Optimize instead into exp2(log2(C)*x) if C is a power of 2 and c99 runtime is available. * generic-match-head.c (canonicalize_math_after_vectorization_p): New inline function. * gimple-match-head.c (canonicalize_math_after_vectorization_p): New inline function. * omp-simd-clone.h: New file. * omp-simd-clone.c: Include omp-simd-clone.h. (expand_simd_clones): No longer static. * tree-vect-patterns.c: Include fold-const-call.h, attribs.h, cgraph.h and omp-simd-clone.h. (vect_recog_pow_pattern): Optimize pow(C,x) to exp(log(C)*x). (vect_recog_widen_shift_pattern): Formatting fix. (vect_pattern_recog_1): Don't check optab for calls. * gcc.dg/pr84309.c: New test. * gcc.target/i386/pr84309.c: New test. Added: trunk/gcc/omp-simd-clone.h trunk/gcc/testsuite/gcc.dg/pr84309.c trunk/gcc/testsuite/gcc.target/i386/pr84309.c Modified: trunk/gcc/ChangeLog trunk/gcc/generic-match-head.c trunk/gcc/gimple-match-head.c trunk/gcc/match.pd trunk/gcc/omp-simd-clone.c trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-vect-patterns.c
