This patch adds support for conditional multiplication and division.
It's mostly mechanical, but a few notes:
* The *_optab name and the .md names are the same as the unconditional
forms, just with "cond_" added to the front. This means we still
have the awkward difference between sdiv and div, etc.
* It was easier to retain the difference between integer and FP
division in the function names, given that they map to different
tree codes (TRUNC_DIV_EXPR and RDIV_EXPR).
* SVE has no direct support for IFN_COND_MOD, but it seemed more
consistent to add it anyway.
* Adding IFN_COND_MUL enables an extra fully-masked reduction
in gcc.dg/vect/pr53773.c.
* In practice we don't actually use the integer division forms without
if-conversion support (added by a later patch).
2018-05-25 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
* doc/sourcebuild.texi (vect_double_cond_arith): Include
multiplication and division.
* doc/md.texi (cond_mul@var{m}, cond_div@var{m}, cond_mod@var{m})
(cond_udiv@var{m}, cond_umod@var{m}): Document.
* optabs.def (cond_smul_optab, cond_sdiv_optab, cond_smod_optab)
(cond_udiv_optab, cond_umod_optab): New optabs.
* internal-fn.def (IFN_COND_MUL, IFN_COND_DIV, IFN_COND_MOD)
(IFN_COND_RDIV): New internal functions.
* internal-fn.c (get_conditional_internal_fn): Handle TRUNC_DIV_EXPR,
TRUNC_MOD_EXPR and RDIV_EXPR.
* match.pd (UNCOND_BINARY, COND_BINARY): Handle them.
* config/aarch64/iterators.md (UNSPEC_COND_MUL, UNSPEC_COND_DIV):
New unspecs.
(SVE_INT_BINARY): Include mult.
(SVE_COND_FP_BINARY): Include UNSPEC_MUL and UNSPEC_DIV.
(optab, sve_int_op): Handle mult.
(optab, sve_fp_op, commutative): Handle UNSPEC_COND_MUL and
UNSPEC_COND_DIV.
* config/aarch64/aarch64-sve.md (cond_<optab><mode>): New pattern
for SVE_INT_BINARY_SD.
gcc/testsuite/
* lib/target-supports.exp
(check_effective_target_vect_double_cond_arith): Include
multiplication and division.
* gcc.dg/vect/pr53773.c: Do not expect a scalar tail when using
fully-masked loops with a fixed vector length.
* gcc.dg/vect/vect-cond-arith-1.c: Add multiplication and division
tests.
* gcc.target/aarch64/sve/vcond_8.c: Likewise.
* gcc.target/aarch64/sve/vcond_9.c: Likewise.
* gcc.target/aarch64/sve/vcond_12.c: Add multiplication tests.
From-SVN: r260713
