[Bug target/83964] [8 Regression] ICE in extract_insn, at recog.c:2304

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83964

--- Comment #20 from Segher Boessenkool <segher at gcc dot gnu.org> ---
There were various issues with the builtins.  We could have made them work
for just (say) power8 and up, in time for GCC 8, but then for a long time no
one would be able to use __builtin_fcti[wd] on other configs without first
doing some configure check for it.  While the instructions exist on *any*
PowerPC (with hard float) (and fctid is illegal in ISA 1.xx on 32-bit
implementations).

Since nothing uses the builtins yet, we are dropping them for GCC 8.  They
will be added back in GCC 9, or a generic implementation sounds even better,
indeed :-)