https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100445
Bug ID: 100445
Summary: ice during RTL pass: vregs
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
For this C code:
int kgd_get_dense_grid_point_double_mesh_mesh_i;
int kgd_get_dense_grid_point_double_mesh_mesh_address[3];
kgd_get_dense_grid_point_double_mesh_mesh() {
for (; kgd_get_dense_grid_point_double_mesh_mesh_i;
kgd_get_dense_grid_point_double_mesh_mesh_i++) {
kgd_get_dense_grid_point_double_mesh_mesh_address
[kgd_get_dense_grid_point_double_mesh_mesh_i] =
(kgd_get_dense_grid_point_double_mesh_mesh_i - 1) / 2;
}
get_grid_point_single_mesh(kgd_get_dense_grid_point_double_mesh_mesh_address);
}
compiled like this:
$ /home/dcb/gcc/results/bin/gcc -c -w -O3 -march=bdver2 bug716.c 2>&1 | more
bug716.c: In function ‘kgd_get_dense_grid_point_double_mesh_mesh’:
bug716.c:11:1: error: unrecognizable insn:
11 | }
| ^
(insn 22 21 23 5 (set (reg:V2SI 95 [ vect_patt_5.16 ])
(if_then_else:V2SI (reg:V2SI 105)
(reg:V2SI 93 [ _40 ])
(reg:V2SI 94 [ vect__1.14 ]))) -1
(nil))
during RTL pass: vregs
bug716.c:11:1: internal compiler error: in extract_insn, at recog.c:2770
The bug seems to occur sometime between git hash 61d48b1e2b5bae1e
and e1fcf14f33e4f371.
My best guess, from a bit bisect, is that Uros's commit with hash
f3661f2d63fbc5fd30c24d22137691e16b0a0a17 is the culprit.
