https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96931
Bug ID: 96931
Summary: [11 Regression] ICE in add_phi_arg, at
tree-phinodes.c:359
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-11.0.0-alpha20200830 snapshot (g:6ccadc4c0486ff011a32c74de1a31148acb3cbe2)
ICEs when compiling the following testcase w/ -O1 -fpredictive-commoning
-fno-tree-loop-im:
int bl;
void
p3 (void);
void __attribute__ ((returns_twice))
ie (void)
{
p3 ();
bl = 0;
for (;;)
++bl;
ie ();
}
% gcc-11.0.0 -O1 -fpredictive-commoning -fno-tree-loop-im -c d8kidanm.c
during GIMPLE pass: pcom
d8kidanm.c: In function 'ie':
d8kidanm.c:7:1: internal compiler error: in add_phi_arg, at tree-phinodes.c:359
7 | ie (void)
| ^~
0x6b7058 add_phi_arg(gphi*, tree_node*, edge_def*, unsigned int)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200830/work/gcc-11-20200830/gcc/tree-phinodes.c:359
0xe41fd0 initialize_root_vars_lm
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200830/work/gcc-11-20200830/gcc/tree-predcom.c:1969
0xe41fd0 execute_load_motion
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200830/work/gcc-11-20200830/gcc/tree-predcom.c:2001
0xe41fd0 execute_pred_commoning
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200830/work/gcc-11-20200830/gcc/tree-predcom.c:2265
0xe45897 tree_predictive_commoning_loop
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200830/work/gcc-11-20200830/gcc/tree-predcom.c:3308
0xe45897 tree_predictive_commoning()
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200830/work/gcc-11-20200830/gcc/tree-predcom.c:3333
