On Mon, 27 Sep 2021, sunil.k.pandey wrote: > On Linux/x86_64, > > 6390c5047adb75960f86d56582e6322aaa4d9281 is the first bad commit > commit 6390c5047adb75960f86d56582e6322aaa4d9281 > Author: Richard Biener <rguent...@suse.de> > Date: Wed Nov 18 09:36:57 2020 +0100 > > Allow different vector types for stmt groups > > caused > > FAIL: gcc.dg/vect/bb-slp-17.c -flto -ffat-lto-objects scan-tree-dump-times > slp2 "optimized: basic block" 1 > FAIL: gcc.dg/vect/bb-slp-17.c scan-tree-dump-times slp2 "optimized: basic > block" 1
This shows that it is maybe a bad idea to support V2SImode vectorization with -m32 when we refuse to implement even plus. OTOH it's just the mode that's available, autovectorize_vector_modes doesn't include the corresponding mode but we still pick it up via the related vector mode for group-size == 2. > FAIL: gcc.dg/vect/bb-slp-pr65935.c -flto -ffat-lto-objects > scan-tree-dump-times slp1 "optimized: basic block" 10 > FAIL: gcc.dg/vect/bb-slp-pr65935.c scan-tree-dump-times slp1 "optimized: > basic block" 10 We are now vectorizing the SSE tail when vectorizing with AVX. I'll adjust the testcase to prefer SSE. > FAIL: gcc.target/i386/vect-pr97352.c scan-assembler-times vmov.pd 4 With -mach=cascadelake we get vpermpd $68, c, %ymm0 vpermpd $238, c, %ymm0 instead of vmovapd c, %ymm1 vinsertf128 $1, %xmm1, %ymm1, %ymm0 vperm2f128 $49, %ymm1, %ymm1, %ymm0 what's a way to disallow additional -march= from taking effect? It's really impossible to cater for all possible ISA variants in these kind of testcases. Richard.