https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102850
Bug ID: 102850 Summary: [10/11/12 Regression] ICE in begin_move_insn, at sched-ebb.c:196 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: --- Target: x86_64-pc-linux-gnu, aarch64-linux-gnu Probably a duplicate of PR91161. gcc-12.0.0-alpha20211017 snapshot (g:5d4d64faa71a6389bfb76bfb3334b63360cf62c0) ICEs when compiling the following testcase w/ -O2 -fsched2-use-superblocks: volatile int x; int y; int baz (void); void bar (void) { for (;;) ++y; } void foo (int a) { int z; if (a && baz ()) { z = x; bar (); } } % x86_64-pc-linux-gnu-gcc-12.0.0 -O2 -fsched2-use-superblocks -c sakxrhiw.c during RTL pass: sched2 sakxrhiw.c: In function 'foo': sakxrhiw.c:24:1: internal compiler error: in begin_move_insn, at sched-ebb.c:196 24 | } | ^ 0x82e8f3 begin_move_insn /var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211017/work/gcc-12-20211017/gcc/sched-ebb.c:196 0x82e8f3 begin_move_insn /var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211017/work/gcc-12-20211017/gcc/sched-ebb.c:144 0x1bc30f2 commit_schedule /var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211017/work/gcc-12-20211017/gcc/haifa-sched.c:6245 0x1bc30f2 schedule_block(basic_block_def**, void*) /var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211017/work/gcc-12-20211017/gcc/haifa-sched.c:7083 0x1ca13be schedule_ebb(rtx_insn*, rtx_insn*, bool) /var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211017/work/gcc-12-20211017/gcc/sched-ebb.c:536 0x1ca19c9 schedule_ebbs() /var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211017/work/gcc-12-20211017/gcc/sched-ebb.c:655 0xe414bc rest_of_handle_sched2 /var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211017/work/gcc-12-20211017/gcc/sched-rgn.c:3740 0xe414bc execute /var/tmp/portage/sys-devel/gcc-12.0.0_alpha20211017/work/gcc-12-20211017/gcc/sched-rgn.c:3878