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Hi! On Tue, Oct 15, 2013 at 02:32:25PM +0200, Jakub Jelinek wrote: > Especially on i?86/x86_64 if-conversion pass seems to be often > a pessimization, but the vectorization relies on it and without it we can't > vectorize a lot of the loops. Here is an updated patchset: - first patch is an updated version of the http://gcc.gnu.org/ml/gcc-patches/2013-10/msg01058.html patch - second patch is one variant (easier to write and perhaps maintain, but perhaps with higher compile time and memory requirements) of the follow up to support if-converted inner loop in outer loop vectorization; I have started also working on variant where just the vectorizer groks outer loop with LOOP_VECTORIZED call and two inner loops, but am only about half way through the needed changes and would prefer to wait how these patches actually work out together - third patch is an updated version of the http://gcc.gnu.org/ml/gcc-patches/2012-11/msg00202.html patch, this time without if-unconversion pass, but instead performed only in the versioned loops for vectorization purposes All 3 patches bootstrapped/regtested together on x86_64-linux and i686-linux, the first patch and first+second patch additionally tested alone with make -C gcc -j4 -k check RUNTESTFLAGS=vect.exp make -C gcc check-gfortran RUNTESTFLAGS="dg.exp='assumed_rank* pr32533*' execute.exp='forall* intrinsic_mmloc* pr54767.f90'" make -C x86*/libgomp check RUNTESTFLAGS=fortran.exp=omp_parse* (the latter two are set of tests that failed at some point during the development of the patchset). If anyone has spare cycles to e.g. SPEC2k{,6} test it on his favourite platforms (both for resulting code performance and for compile time and/or compile memory usage), it would be greatly appreciated. The only targets with masked load/store support are right now i?86/x86_64 with -mavx and higher (and for masked gather load support only -mavx2 and higher), so the last patch will probably be only beneficial to those for the time being. Jakub
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