https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109178
Bug ID: 109178
Summary: ICE using __builtin_vec_xst_trunc built-in
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: bergner at gcc dot gnu.org
Target Milestone: ---
We ICE on the following simple test case. This ICEs on trunk and GCC 12 and
works on GCC 11 and earlier.
bergner@ltcden2-lp1:~$ cat bug.c
#include <altivec.h>
void
foo (signed int *dst, vector signed __int128 src)
{
__builtin_vec_xst_trunc(src, 0, dst);
}
bergner@ltcden2-lp1:~$ gcc -S -O2 -mcpu=power10 bug.c
bug.c: In function ‘foo’:
bug.c:7:1: error: unrecognizable insn:
7 | }
| ^
(insn 9 8 0 2 (set (mem:DI (reg:DI 119) [0 S8 A8])
(truncate:SI (reg:TI 120))) "bug4.c":6:3 -1
(nil))
during RTL pass: vregs
bug.c:7:1: internal compiler error: in extract_insn, at recog.cc:2791
The above should be mem:SI and is caused by a typo in the rs6000 built-in
rewrite in GCC 12. I have a patch I'm testing.
