https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118151
ktkachov at gcc dot gnu.org changed:
What |Removed |Added
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CC| |ktkachov at gcc dot gnu.org
--- Comment #2 from ktkachov at gcc dot gnu.org ---
We've also had reports for the use cases:
#include <arm_sve.h>
bool any(svuint64_t a, svuint64_t b) {
const svbool_t p = svptrue_pat_b8(SV_VL16);
const svbool_t c = svcmpeq_u64(p, a, b);
return svptest_any(p, c);
}
bool first(svuint64_t a, svuint64_t b) {
const svbool_t p = svptrue_pat_b8(SV_VL16);
const svbool_t c = svcmpeq_u64(p, a, b);
return svptest_first(p, c);
}
bool last(svuint64_t a, svuint64_t b) {
const svbool_t p = svptrue_pat_b8(SV_VL16);
const svbool_t c = svcmpeq_u64(p, a, b);
return svptest_last(p, c);
}
I think these are the same issue here but I can file a separate PR if not.
In this case the question is whether we can do away with the PTEST entirely and
just use the CMP.
