https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99085
Bug ID: 99085 Summary: [11 Regression] ICE: verify_flow_info failed (error: multiple hot/cold transitions found) Product: gcc Version: 11.0 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: --- Target: x86_64-unknown-linux-gnu gcc-11.0.0-alpha20210207 snapshot (g:3d912941f29c27b2ac7c79b9e7cb2f1150e75758) ICEs when compiling the following testcase, reduced from gcc/testsuite/c-c++-common/torture/builtin-clear-padding-4.c, w/ -O2 -fgraphite-identity -fsel-sched-pipelining -fselective-scheduling2: void foo (int m, int n, int o, int i) { long double a2[m]; int c2[n][o]; int j, k; while (i < m) a2[i++] = 13.132L; for (j = 0; j < n; j++) for (k = 0; k < o; k++) c2[j][k] = 1; __builtin_abort (); } % x86_64-unknown-linux-gnu-gcc-11.0.0 -O2 -fgraphite-identity -fsel-sched-pipelining -fselective-scheduling2 -c euiuvzbp.c euiuvzbp.c: In function 'foo': euiuvzbp.c:16:1: error: multiple hot/cold transitions found (bb 15) 16 | } | ^ euiuvzbp.c:16:1: error: multiple hot/cold transitions found (bb 11) during RTL pass: stack euiuvzbp.c:16:1: internal compiler error: verify_flow_info failed 0x965f92 verify_flow_info() /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20210207/work/gcc-11-20210207/gcc/cfghooks.c:269 0x97e2f9 checking_verify_flow_info /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20210207/work/gcc-11-20210207/gcc/cfghooks.h:212 0x97e2f9 commit_edge_insertions() /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20210207/work/gcc-11-20210207/gcc/cfgrtl.c:2115 0xd71ff0 convert_regs /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20210207/work/gcc-11-20210207/gcc/reg-stack.c:3270 0xd71ff0 reg_to_stack /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20210207/work/gcc-11-20210207/gcc/reg-stack.c:3374 0xd71ff0 rest_of_handle_stack_regs /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20210207/work/gcc-11-20210207/gcc/reg-stack.c:3429 0xd71ff0 execute /var/tmp/portage/sys-devel/gcc-11.0.0_alpha20210207/work/gcc-11-20210207/gcc/reg-stack.c:3461