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