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The vectorizer has learned how to do boolean reductions of masks to a C bool
for the operations OR, XOR and AND.
This implements the new optabs for SVE.
For SVE & and the | case would use the CC registers.
or_reduc:
ptest p0, p0.b
cset w0, any
and_reduc:
ptrue p3.b, all
nots p3.b, p3/z, p0.b
cset w0, none
and the ^ case we'd see if the number of active predicate lanes
is a multiple of two.
xor_reduc:
ptrue p3.b, all
cntp x0, p3, p0.b
and w0, w0, 1
gcc/ChangeLog:
* config/aarch64/aarch64-sve.md (reduc_sbool_and_scal_<mode>,
reduc_sbool_ior_scal_<mode>, reduc_sbool_xor_scal_<mode>): New.
gcc/testsuite/ChangeLog:
* gcc.target/aarch64/sve/vect-reduc-bool-1.c: New test.
* gcc.target/aarch64/sve/vect-reduc-bool-2.c: New test.
* gcc.target/aarch64/sve/vect-reduc-bool-3.c: New test.
* gcc.target/aarch64/sve/vect-reduc-bool-4.c: New test.
* gcc.target/aarch64/sve/vect-reduc-bool-5.c: New test.
* gcc.target/aarch64/sve/vect-reduc-bool-6.c: New test.
* gcc.target/aarch64/sve/vect-reduc-bool-7.c: New test.
* gcc.target/aarch64/sve/vect-reduc-bool-8.c: New test.
* gcc.target/aarch64/sve/vect-reduc-bool-9.c: New test.
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