https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87349
Bug ID: 87349
Summary: [9 Regression] ICE: Segmentation fault (in
useless_type_conversion_p or is_gimple_reg_type)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-9.0.0-alpha20180916 snapshot (r264351) ICEs when compiling the following
snippets w/ -O1 or -Og:
1.
void
h1 (int *fh, int pw)
{
*fh = 0;
if (*fh != 0)
for (;;)
{
fh = &pw;
if (pw == 0)
{
}
else
while (pw < 1)
{
if (pw == 0)
{
ut:
;
}
++pw;
}
if (pw == *fh)
goto ut;
}
goto ut;
}
% gcc-9.0.0-alpha20180916 -O1 -c nshv93ku.c
during GIMPLE pass: fre
nshv93ku.c: In function 'h1':
nshv93ku.c:30:1: internal compiler error: Segmentation fault
30 | }
| ^
0xcc84df crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/toplev.c:325
0xa296f0 useless_type_conversion_p(tree_node*, tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/gimple-expr.c:70
0xd0149c verify_gimple_assign_single
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:4390
0xd0149c verify_gimple_assign
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:4612
0xd0149c verify_gimple_stmt
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:4880
0xd107b3 verify_gimple_in_cfg(function*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:5358
0xbe74af execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/passes.c:1943
0xbe839e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/passes.c:1997
2.
--- nshv93ku.c.jj 2018-09-18 15:40:38.439857690 +0700
+++ nshv93ku.c 2018-09-18 15:40:59.678335059 +0700
@@ -22,7 +22,7 @@ h1 (int *fh, int pw)
++pw;
}
- if (pw == 0)
+ if (pw == *fh)
goto ut;
}
during GIMPLE pass: fre
nshv93ku.c: In function 'h1':
nshv93ku.c:30:1: internal compiler error: Segmentation fault
30 | }
| ^
0xcc84df crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/toplev.c:325
0xa2abc1 is_gimple_reg_type
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/gimple-expr.h:75
0xa2abc1 is_gimple_val(tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/gimple-expr.c:789
0xd1044a verify_gimple_phi
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:4975
0xd1044a verify_gimple_in_cfg(function*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/tree-cfg.c:5303
0xbe74af execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/passes.c:1943
0xbe839e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180916/work/gcc-9-20180916/gcc/passes.c:1997
