https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98648
Hongtao.liu <crazylht at gmail dot com> changed:
What |Removed |Added
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CC| |crazylht at gmail dot com
--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
It looks like not an ABI issue, but gcc didn't simplify for vector all one bits
for floating point.
.277r.combine
Trying 6 -> 7:
6: r85:V4SF=const_vector
7: r84:V4SF=~r85:V4SF&r87:V4SF
REG_DEAD r87:V4SF
REG_DEAD r85:V4SF
Failed to match this instruction:
(set (reg:V4SF 84)
(and:V4SF (reg:V4SF 87)
(const_vector:V4SF [
(const_double:SF -QNaN [-QNaN]) repeated x4
])))
When NAN is all ones(which is situation here), it should be simplified to (set
(reg:V4SF 84) (reg: V4SF 87))
