https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105459
Bug ID: 105459 Summary: ICE: Segmentation fault (in record_operand_costs) Product: gcc Version: 12.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: rtl-optimization Assignee: unassigned at gcc dot gnu.org Reporter: asolokha at gmx dot com Target Milestone: --- gcc 12.0.1 20220424 snapshot (g:6b7441a46c771aa6ecdc0c8ed96197417d036b9a) ICEs when compiling the following testcase w/ -O1 -flto: double m; int n; __attribute__ ((optimize ("-funsafe-math-optimizations"))) void bar (int x) { n = x; m = n; } __attribute__ ((flatten)) void foo (int x) { bar (x); } void quux (void) { ++n; } int main (void) { foo (0); quux (); return 0; } % x86_64-unknown-linux-gnu-gcc-12.0.1 -O1 -flto qnipdldf.c during RTL pass: ira qnipdldf.c: In function 'main': qnipdldf.c:30:1: internal compiler error: Segmentation fault 30 | } | ^ 0xd95abf crash_signal /var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/toplev.cc:322 0xbabeb8 record_operand_costs /var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-costs.cc:1382 0xbac464 scan_one_insn /var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-costs.cc:1507 0xbac464 process_bb_for_costs /var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-costs.cc:1632 0xba2ae1 ira_traverse_loop_tree(bool, ira_loop_tree_node*, void (*)(ira_loop_tree_node*), void (*)(ira_loop_tree_node*)) /var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-build.cc:1800 0xbad545 find_costs_and_classes /var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-costs.cc:1728 0xbae639 ira_costs() /var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-costs.cc:2276 0xba806c ira_build() /var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-build.cc:3481 0xb9dd0c ira /var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira.cc:5760 0xb9dd0c execute /var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira.cc:6083 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. lto-wrapper: fatal error: x86_64-unknown-linux-gnu-gcc-12.0.1 returned 1 exit status compilation terminated. /usr/lib/gcc/x86_64-unknown-linux-gnu/12.0.1/../../../../x86_64-unknown-linux-gnu/bin/ld: fatal error: lto-wrapper failed