https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82420
Bug ID: 82420
Summary: ICE with -malign-int and -m68000
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: vvulpes0 at gmail dot com
Target Milestone: ---
Target: m68k-elf
Created attachment 42297
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42297&action=edit
test.c
When compiling test.c with the -march=68000 and -malign-int flags, a
segmentation fault occurs. My installed copy of 7.2.0 has limited debugging
information, but another machine with 7.1.0 installed provides:
$ m68k-elf-gcc -march=68000 -malign-int -c test.c
test.c: In function 'f':
test.c:3:4: internal compiler error: Segmentation fault
a /= 3;
^~
0x98c6df crash_signal
../../gcc-7.1.0/gcc/toplev.c:337
0x76072e assign_temp(tree_node*, int, int)
../../gcc-7.1.0/gcc/function.c:956
0x720e51 emit_push_insn(rtx_def*, machine_mode, tree_node*, rtx_def*, unsigned
int, int, rtx_def*, int, rtx_def*, rtx_def*, int, rtx_def*, bool)
../../gcc-7.1.0/gcc/expr.c:4314
0x62f734 emit_library_call_value_1
../../gcc-7.1.0/gcc/calls.c:4841
0x63452f emit_library_call_value(rtx_def*, rtx_def*, libcall_type,
machine_mode, int, ...)
../../gcc-7.1.0/gcc/calls.c:5162
0x8be6ce expand_binop(machine_mode, optab_tag, rtx_def*, rtx_def*, rtx_def*,
int, optab_methods)
../../gcc-7.1.0/gcc/optabs.c:1758
0x8c0cfa sign_expand_binop(machine_mode, optab_tag, optab_tag, rtx_def*,
rtx_def*, rtx_def*, int, optab_methods)
../../gcc-7.1.0/gcc/optabs.c:1888
0x712c98 expand_divmod(int, tree_code, machine_mode, rtx_def*, rtx_def*,
rtx_def*, int)
../../gcc-7.1.0/gcc/expmed.c:5052
0x727084 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../gcc-7.1.0/gcc/expr.c:8841
0x63f85d expand_gimple_stmt_1
../../gcc-7.1.0/gcc/cfgexpand.c:3676
0x63f85d expand_gimple_stmt
../../gcc-7.1.0/gcc/cfgexpand.c:3737
0x640cb5 expand_gimple_basic_block
../../gcc-7.1.0/gcc/cfgexpand.c:5744
0x64588e execute
../../gcc-7.1.0/gcc/cfgexpand.c:6357
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.
This 7.1.0 was configured with:
$ m68k-elf-gcc -v
Using built-in specs.
COLLECT_GCC=m68k-elf-gcc
COLLECT_LTO_WRAPPER=/opt/toolchains/m68k/libexec/gcc/m68k-elf/7.1.0/lto-wrapper
Target: m68k-elf
Configured with: ../gcc-7.1.0/configure --target=m68k-elf
--program-prefix=m68k-elf- --prefix=/opt/toolchains/m68k
--with-local-prefix=/opt/toolchains/m68k --with-newlib --enable-languages=c,c++
--disabel-nls --disable-werror --enable-threads=single --disable-libssp
--disable-libquadmath --with-cpu=68000 --with-arch=m68k
Thread model: single
gcc version 7.1.0 (GCC)
The error persists if "-march=68000" is replaced by "-march=68010", but
disappears for values of "68020" and above. This is presumably because the
higher versions have (multiplication and) division instructions that operate on
and produce wider types than the originals.
