[Bug c++/111279] New: ICE: Segmentation fault with m68k,SJLJ and -malign-int

["vincent.riviere at freesbee dot fr" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111279

            Bug ID: 111279
           Summary: ICE: Segmentation fault with m68k,SJLJ and -malign-int
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vincent.riviere at freesbee dot fr
  Target Milestone: ---

m68k-elf-g++ causes "internal compiler error: Segmentation fault" when
configured for m68k-elf, SJLJ exceptions, and compiling a specific program with
-malign-int.

$ cat >bug.cc <<EOF
template<typename T>
struct A
{
  A()
  { }

  char buf[4];
};

template<typename T>
struct B : public A<T>
{
  B()
  { }
};

template<typename T>
struct C : public B<T>
{
  C() throw()
  { }
};

void f()
{
  C<char> tmp;
}
EOF

gcc was configured with:
~/sources/gcc/configure --target=m68k-elf --disable-nls --disable-multilib
--enable-languages="c,c++" --disable-libstdc++-pch --disable-lto
--enable-sjlj-exceptions

$ /home/vincent/compil/gccelfsjlj.obj/gcc/cc1plus bug.cc -malign-int
 A<T>::A() B<T>::B() C<T>::C() void f() C<char> B<char> A<char> C<T>::C() [with
T = char] C<T>::C() [with T = char] C<T>::C() [with T = char] B<T>::B() [with T
= char] B<T>::B() [with T = char] B<T>::B() [with T = char] A<T>::A() [with T =
char] A<T>::A() [with T = char] A<T>::A() [with T = char]
Analyzing compilation unit
Performing interprocedural optimizations
 <*free_lang_data> {heap 1068k} <visibility> {heap 1068k} <build_ssa_passes>
{heap 1068k} <opt_local_passes> {heap 1348k} <remove_symbols> {heap 1348k}
<targetclone> {heap 1348k} <free-fnsummary> {heap 1348k}Streaming LTO
 <whole-program> {heap 1348k} <fnsummary> {heap 1348k} <inline> {heap 1348k}
<modref> {heap 1348k} <free-fnsummary> {heap 1348k} <single-use> {heap 1348k}
<comdats> {heap 1348k}Assembling functions:
 void f() C<T>::C() [with T = char]during RTL pass: expand

bug.cc: In constructor 'C<T>::C() [with T = char]':
bug.cc:21:5: internal compiler error: Segmentation fault
   21 |   { }
      |     ^
0x1174ec3 crash_signal
        /home/vincent/sources/gcc/gcc/toplev.cc:314
0x7f7ca4a3c4af ???
        ./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
0xe08653 assign_temp(tree_node*, int, int)
        /home/vincent/sources/gcc/gcc/function.cc:976
0xdab01f emit_push_insn(rtx_def*, machine_mode, tree_node*, rtx_def*, unsigned
int, int, rtx_def*, poly_int<1u, long>, rtx_def*, rtx_def*, int, rtx_def*,
bool)
        /home/vincent/sources/gcc/gcc/expr.cc:4920
0xc5f915 emit_library_call_value_1(int, rtx_def*, rtx_def*, libcall_type,
machine_mode, int, std::pair<rtx_def*, machine_mode>*)
        /home/vincent/sources/gcc/gcc/calls.cc:4585
0xd765bf emit_library_call(rtx_def*, libcall_type, machine_mode, rtx_def*,
machine_mode)
        /home/vincent/sources/gcc/gcc/rtl.h:4343
0xd765bf sjlj_emit_function_enter
        /home/vincent/sources/gcc/gcc/except.cc:1212
0xd7b90d sjlj_build_landing_pads
        /home/vincent/sources/gcc/gcc/except.cc:1491
0xd7b90d finish_eh_generation()
        /home/vincent/sources/gcc/gcc/except.cc:1520
0xc7c1a6 execute
        /home/vincent/sources/gcc/gcc/cfgexpand.cc:6940
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ /home/vincent/compil/gccelfsjlj.obj/gcc/cc1plus bug.cc -malign-int
 A<T>::A() B<T>::B() C<T>::C() void f() C<char> B<char> A<char> C<T>::C() [with
T = char] C<T>::C() [with T = char] C<T>::C() [with T = char] B<T>::B() [with T
= char] B<T>::B() [with T = char] B<T>::B() [with T = char] A<T>::A() [with T =
char] A<T>::A() [with T = char] A<T>::A() [with T = char]
Analyzing compilation unit
Performing interprocedural optimizations
 <*free_lang_data> {heap 1068k} <visibility> {heap 1068k} <build_ssa_passes>
{heap 1068k} <opt_local_passes> {heap 1348k} <remove_symbols> {heap 1348k}
<targetclone> {heap 1348k} <free-fnsummary> {heap 1348k}Streaming LTO
 <whole-program> {heap 1348k} <fnsummary> {heap 1348k} <inline> {heap 1348k}
<modref> {heap 1348k} <free-fnsummary> {heap 1348k} <single-use> {heap 1348k}
<comdats> {heap 1348k}Assembling functions:
 void f() C<T>::C() [with T = char]during RTL pass: expand

bug.cc: In constructor 'C<T>::C() [with T = char]':
bug.cc:21:5: internal compiler error: Segmentation fault
   21 |   { }
      |     ^
0x1174ec3 crash_signal
        /home/vincent/sources/gcc/gcc/toplev.cc:314
0x7f7ca4a3c4af ???
        ./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
0xe08653 assign_temp(tree_node*, int, int)
        /home/vincent/sources/gcc/gcc/function.cc:976
0xdab01f emit_push_insn(rtx_def*, machine_mode, tree_node*, rtx_def*, unsigned
int, int, rtx_def*, poly_int<1u, long>, rtx_def*, rtx_def*, int, rtx_def*,
bool)
        /home/vincent/sources/gcc/gcc/expr.cc:4920
0xc5f915 emit_library_call_value_1(int, rtx_def*, rtx_def*, libcall_type,
machine_mode, int, std::pair<rtx_def*, machine_mode>*)
        /home/vincent/sources/gcc/gcc/calls.cc:4585
0xd765bf emit_library_call(rtx_def*, libcall_type, machine_mode, rtx_def*,
machine_mode)
        /home/vincent/sources/gcc/gcc/rtl.h:4343
0xd765bf sjlj_emit_function_enter
        /home/vincent/sources/gcc/gcc/except.cc:1212
0xd7b90d sjlj_build_landing_pads
        /home/vincent/sources/gcc/gcc/except.cc:1491
0xd7b90d finish_eh_generation()
        /home/vincent/sources/gcc/gcc/except.cc:1520
0xc7c1a6 execute
        /home/vincent/sources/gcc/gcc/cfgexpand.cc:6940
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

Tested with the current master branch (GCC 14), and also with GCC 13.2.0.