https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65930
--- Comment #21 from Rainer Orth <ro at gcc dot gnu.org> --- (In reply to Richard Biener from comment #19) > Author: rguenth > Date: Wed Oct 23 12:41:49 2019 > New Revision: 277322 > > URL: https://gcc.gnu.org/viewcvs?rev=277322&root=gcc&view=rev > Log: > 2019-10-23 Richard Biener <rguent...@suse.de> > > PR tree-optimization/65930 > * tree-vect-loop.c (check_reduction_path): Allow conversions > that only change the sign. > (vectorizable_reduction): Relax latch def stmts we handle further. > > * gcc.dg/vect/vect-reduc-2char-big-array.c: Adjust. > * gcc.dg/vect/vect-reduc-2char.c: Likewise. > * gcc.dg/vect/vect-reduc-2short.c: Likewise. > * gcc.dg/vect/vect-reduc-dot-s8b.c: Likewise. > * gcc.dg/vect/vect-reduc-pattern-2c.c: Likewise. This patch caused a couple of regressions on Solaris/SPARC (32 and 64-bit): +FAIL: gcc.dg/vect/vect-reduc-2char-big-array.c -flto -ffat-lto-objects scan-tree-dump-times vect "vectorized 3 loops" 1 +FAIL: gcc.dg/vect/vect-reduc-2char-big-array.c scan-tree-dump-times vect "vectorized 3 loops" 1 +FAIL: gcc.dg/vect/vect-reduc-2char.c -flto -ffat-lto-objects scan-tree-dump-times vect "vectorized 3 loops" 1 +FAIL: gcc.dg/vect/vect-reduc-2char.c scan-tree-dump-times vect "vectorized 3 loops" 1 +FAIL: gcc.dg/vect/vect-reduc-2short.c -flto -ffat-lto-objects scan-tree-dump-times vect "vectorized 3 loops" 1 +FAIL: gcc.dg/vect/vect-reduc-2short.c scan-tree-dump-times vect "vectorized 3 loops" 1 +FAIL: gcc.dg/vect/vect-reduc-dot-s8b.c -flto -ffat-lto-objects scan-tree-dump-times vect "vectorized 1 loops" 1 +FAIL: gcc.dg/vect/vect-reduc-dot-s8b.c scan-tree-dump-times vect "vectorized 1 loops" 1 +FAIL: gcc.dg/vect/vect-reduc-pattern-2c.c -flto -ffat-lto-objects scan-tree-dump-times vect "vectorized 1 loops" 1 +FAIL: gcc.dg/vect/vect-reduc-pattern-2c.c scan-tree-dump-times vect "vectorized 1 loops" 1 I'm attaching the vect-reduc-2char-big-array.c dump as an example.
