[Bug target/83926] ICE during RTL pass: ira, in elimination_costs_in_insn, at reload1.c:3633

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83926

--- Comment #10 from Peter Bergner <bergner at gcc dot gnu.org> ---
A similar error happens with the __builtin_vsx_udiv_2di() that happens with
__builtin_vsx_div_2di(), which shows the splitter for vsx_udiv_v2di calling
gen_udivdi3() directly:

[bergner@makalu-lp1 PR83926]$ cat udiv.i 
__attribute__ ((altivec(vector__))) unsigned long long
foo (__attribute__ ((altivec(vector__))) unsigned long long a,
     __attribute__ ((altivec(vector__))) unsigned long long b)
{
  return __builtin_vsx_udiv_2di (a, b);
}
[bergner@makalu-lp1 PR83926]$
/home/bergner/gcc/build/gcc-fsf-mainline-pr83926-debug/gcc/xgcc
-B/home/bergner/gcc/build/gcc-fsf-mainline-pr83926-debug/gcc -S -mcpu=power8
-O1 -m32 -mno-fold-gimple udiv.i 
gimple folding of rs6000 builtins has been disabled.
udiv.i: In function ‘foo’:
udiv.i:6:1: error: unrecognizable insn:
 }
 ^
(insn 16 15 17 2 (set (reg:DI 127)
        (udiv:DI (reg:DI 125)
            (reg:DI 126))) "udiv.i":6 -1
     (nil))
during RTL pass: subreg2
udiv.i:6:1: internal compiler error: in extract_insn, at recog.c:2304
0x10ddd69f _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /home/bergner/gcc/gcc-fsf-mainline-pr83926/gcc/rtl-error.c:108