https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93124
Bug ID: 93124
Summary: ICE in df_install_refs at df-scan.c:2376
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: ktkachov at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: aarch64-linux-gnu
The following test-case ICEs:
$ cat ice.i
int a;
void fn2();
void fn3();
void fn4();
void fn5();
void fn6();
void
fn1() {
int n = 0;
for (;; ++n) {
{
struct {
char a[n];
} s;
fn2(s);
}
struct {
unsigned a[a];
} s;
int i = 0, b;
for (; i < n; ++i)
;
fn2(s);
{
struct {
char a[n];
} s;
int i;
for (i = 0; i < n; ++i)
s.a[i] = i;
fn3(s, s);
}
fn4();
{
struct {
unsigned a[n];
} s;
fn5(s);
}
{
struct {
char a[b];
} s;
for (; i < n;)
s.a[i] = i;
fn6(s);
}
}
}
$ aarch64-linux-gnu-gcc ice.i -O2 -fno-rerun-cse-after-loop
-fno-guess-branch-probability -fno-tree-fre -c
during RTL pass: reload
ice.i: In function ‘fn1’:
ice.i:51:1: internal compiler error: Segmentation fault
51 | }
| ^
0xb118bf crash_signal
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/toplev.c:328
0x7f4f7b6bb14f ???
/usr/src/debug/glibc-2.30-2.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x788e04 df_install_refs
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/df-scan.c:2376
0x788ed8 df_install_refs
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/df-scan.c:2422
0x788ed8 df_refs_add_to_chains
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/df-scan.c:2422
0x78f275 df_bb_refs_record(int, bool)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/df-scan.c:3339
0x78f48c df_scan_blocks()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/df-scan.c:588
0x969776 do_reload
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/ira.c:5590
0x969776 execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/ira.c:5712
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
