Richard Biener <rguent...@suse.de> writes: > The following retires vcond{,u,eq} optabs by stopping to use them > from the middle-end. Targets instead (should) implement vcond_mask > and vec_cmp{,u,eq} optabs. The PR this change refers to lists > possibly affected targets - those implementing these patterns, > and in particular it lists mips, sparc and ia64 as targets that > most definitely will regress while others might simply remove > their vcond{,u,eq} patterns. > > I'd appreciate testing, I do not expect fallout for x86 or arm/aarch64. > I know riscv doesn't implement any of the legacy optabs. But less > maintained vector targets might need adjustments. > > I want to get rid of those optabs for GCC 15. If I don't hear from > you I will assume your target is fine.
Great! Thanks for doing this. Is there a plan for how we should handle vector comparisons that have to be done as the inverse of the negated condition? Should targets simply not provide vec_cmp for such conditions and leave the target-independent code to deal with the fallout? (For a standalone comparison, it would invert the result. For a VEC_COND_EXPR it would swap the true and false values.) Richard > > Thanks, > Richard. > > PR middle-end/114189 > * optabs-query.h (get_vcond_icode): Always return CODE_FOR_nothing. > (get_vcond_eq_icode): Likewise. > --- > gcc/optabs-query.h | 13 ++++--------- > 1 file changed, 4 insertions(+), 9 deletions(-) > > diff --git a/gcc/optabs-query.h b/gcc/optabs-query.h > index 0cb2c21ba85..31fbce80175 100644 > --- a/gcc/optabs-query.h > +++ b/gcc/optabs-query.h > @@ -112,14 +112,9 @@ get_vec_cmp_eq_icode (machine_mode vmode, machine_mode > mask_mode) > mode CMODE, unsigned if UNS is true, resulting in a value of mode VMODE. > */ > > inline enum insn_code > -get_vcond_icode (machine_mode vmode, machine_mode cmode, bool uns) > +get_vcond_icode (machine_mode, machine_mode, bool) > { > - enum insn_code icode = CODE_FOR_nothing; > - if (uns) > - icode = convert_optab_handler (vcondu_optab, vmode, cmode); > - else > - icode = convert_optab_handler (vcond_optab, vmode, cmode); > - return icode; > + return CODE_FOR_nothing; > } > > /* Return insn code for a conditional operator with a mask mode > @@ -135,9 +130,9 @@ get_vcond_mask_icode (machine_mode vmode, machine_mode > mmode) > mode CMODE (only EQ/NE), resulting in a value of mode VMODE. */ > > inline enum insn_code > -get_vcond_eq_icode (machine_mode vmode, machine_mode cmode) > +get_vcond_eq_icode (machine_mode, machine_mode) > { > - return convert_optab_handler (vcondeq_optab, vmode, cmode); > + return CODE_FOR_nothing; > } > > /* Enumerates the possible extraction_insn operations. */