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.
