https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114048
Sam James <sjames at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[14 regression] ICE when |[14 regression] ICE when
|building libowfat-0.33 on |building libowfat-0.33
|x86 |
--- Comment #3 from Sam James <sjames at gcc dot gnu.org> ---
It crashes on amd64 for me too but differently:
```
$ gcc /tmp/foo.c -O2
during GIMPLE pass: fre
/tmp/foo.c: In function ‘allprefixed_traverse’:
/tmp/foo.c:6:5: internal compiler error: in copy_reference_ops_from_ref, at
tree-ssa-sccvn.cc:1185
6 | int allprefixed_traverse(char *top) {
| ^~~~~~~~~~~~~~~~~~~~
0x55da5656e87d copy_reference_ops_from_ref
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/tree-ssa-sccvn.cc:1185
/tmp/foo.c:6:5: internal compiler error: Segmentation fault
0x55da5700a7f6 crash_signal
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/toplev.cc:317
0x55da582ff8d7 x86_64_fallback_frame_state
./md-unwind-support.h:63
0x55da582ff8d7 uw_frame_state_for
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/libgcc/unwind-dw2.c:1013
0x55da583009fd _Unwind_Backtrace
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/libgcc/unwind.inc:303
0x55da57773aa8 backtrace_full
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/libbacktrace/backtrace.c:127
0x55da561080dd diagnostic_context::action_after_output(diagnostic_t)
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/diagnostic.cc:781
0x55da5785edeb diagnostic_action_after_output(diagnostic_context*,
diagnostic_t)
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/diagnostic.h:1002
0x55da5785edeb diagnostic_context::report_diagnostic(diagnostic_info*)
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/diagnostic.cc:1633
0x55da57fa21e8 diagnostic_impl
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/diagnostic.cc:1767
0x55da5773d17f internal_error(char const*, ...)
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/diagnostic.cc:2225
0x55da57714254 fancy_abort(char const*, int, char const*)
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/diagnostic.cc:2336
0x55da5656e87d copy_reference_ops_from_ref
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/tree-ssa-sccvn.cc:1185
```
and w/ valgrind:
```
$ gcc /tmp/foo.c -O2 -wrapper valgrind
==2895261== Memcheck, a memory error detector
==2895261== Copyright (C) 2002-2022, and GNU GPL'd, by Julian Seward et al.
==2895261== Using Valgrind-3.23.0.GIT and LibVEX; rerun with -h for copyright
info
==2895261== Command: /usr/libexec/gcc/x86_64-pc-linux-gnu/14/cc1 -quiet
/tmp/foo.c -quiet -dumpdir a- -dumpbase foo.c -dumpbase-ext .c -mtune=generic
-march=x86-64 -O2 -o /tmp/cc89yYYR.s
==2895261==
during GIMPLE pass: fre
/tmp/foo.c: In function ‘allprefixed_traverse’:
/tmp/foo.c:6:5: internal compiler error: in copy_reference_ops_from_ref, at
tree-ssa-sccvn.cc:1185
6 | int allprefixed_traverse(char *top) {
| ^~~~~~~~~~~~~~~~~~~~
0x7c787d copy_reference_ops_from_ref
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/tree-ssa-sccvn.cc:1185
==2895261== Invalid read of size 1
==2895261== at 0x25588D7: x86_64_fallback_frame_state
(md-unwind-support.h:63)
==2895261== by 0x25588D7: uw_frame_state_for (unwind-dw2.c:1013)
==2895261== by 0x25599FD: _Unwind_Backtrace (unwind.inc:303)
==2895261== by 0x19CCAA8: backtrace_full (backtrace.c:127)
==2895261== by 0x3610DD:
diagnostic_context::action_after_output(diagnostic_t) [clone .cold]
(diagnostic.cc:781)
==2895261== by 0x1AB7DEB: UnknownInlinedFun (diagnostic.h:1002)
==2895261== by 0x1AB7DEB:
diagnostic_context::report_diagnostic(diagnostic_info*) (diagnostic.cc:1633)
==2895261== by 0x21FB1E8: diagnostic_impl(rich_location*,
diagnostic_metadata const*, int, char const*, __va_list_tag (*) [1],
diagnostic_t) [clone .lto_priv.0] (diagnostic.cc:1767)
==2895261== by 0x199617F: internal_error(char const*, ...)
(diagnostic.cc:2225)
==2895261== by 0x196D254: fancy_abort(char const*, int, char const*)
(diagnostic.cc:2336)
==2895261== by 0x7C787D: copy_reference_ops_from_ref(tree_node*,
vec<vn_reference_op_struct, va_heap, vl_ptr>*) [clone .lto_priv.0] [clone
.cold] (tree-ssa-sccvn.cc:1185)
==2895261== Address 0x864f60e8d98948 is not stack'd, malloc'd or (recently)
free'd
==2895261==
/tmp/foo.c:6:5: internal compiler error: Segmentation fault
```
