https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102254
Bug ID: 102254
Summary: [12 Regression] ICE: in extract_insn, at recog.c:2769
(error: unrecognizable insn)
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: aarch64-linux-gnu
gcc-12.0.0-alpha20210905 snapshot (g:a827909537cf085e5673ca7816b7bd7151d89fc5)
ICEs when compiling the following testcase w/ -Og:
void
foo (void)
{
int x;
*((double *) &x) = 0;
}
% aarch64-linux-gnu-gcc-12.0.0 -Og -c zkc6b9w3.c
zkc6b9w3.c: In function 'foo':
zkc6b9w3.c:7:1: error: unrecognizable insn:
7 | }
| ^
(insn 5 2 0 2 (set (subreg:DF (reg/v:SI 92 [ x ]) 0)
(const_double:DF 0.0 [0x0.0p+0])) "zkc6b9w3.c":6:22 -1
(nil))
during RTL pass: vregs
zkc6b9w3.c:7:1: internal compiler error: in extract_insn, at recog.c:2769
0x75df07 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/rtl-error.c:108
0x75df27 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/rtl-error.c:116
0x75c539 extract_insn(rtx_insn*)
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/recog.c:2769
0xbc758c instantiate_virtual_regs_in_insn
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/function.c:1611
0xbc758c instantiate_virtual_regs
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/function.c:1985
0xbc758c execute
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/function.c:2034
