https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97703
Bug ID: 97703 Summary: [11 Regression] ICE in fix_reg_equiv_init at gcc/ira.c:2683 Product: gcc Version: 11.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: marxin at gcc dot gnu.org CC: ktkachov at gcc dot gnu.org, rdsandiford at googlemail dot com, rearnsha at gcc dot gnu.org Target Milestone: --- Host: x86_64-linux Target: arm-linux-gnueabi The following fails: $ arm-linux-gnueabi-gcc /home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/compile/sync-1.c -mcpu=cortex-r4f -Ofast -fno-toplevel-reorder -c /home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/compile/sync-1.c: In function ‘test_op_ignore’: /home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/compile/sync-1.c:80:10: note: ‘__sync_fetch_and_nand’ changed semantics in GCC 4.4 80 | (void) __sync_fetch_and_nand (&sc, 1); | ^~~~~~~~~~~~~~~~~~~~~ during RTL pass: ira /home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/compile/sync-1.c:90:1: internal compiler error: Segmentation fault 90 | } | ^ 0xb0e06f crash_signal /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/toplev.c:330 0x7ffff76ae6bf ??? /usr/src/debug/glibc-2.32-1.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0 0x964bbb rtx_insn_list::next() const /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/rtl.h:1407 0x964bbb fix_reg_equiv_init /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/ira.c:2683 0x96cb8f fix_reg_equiv_init /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/ira.c:2674 0x96cb8f find_moveable_pseudos /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/ira.c:4874 0x96cb8f ira /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/ira.c:5533 0x96cb8f execute /home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/ira.c:5861 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions.