https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98549
--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
There's a reproducer without a warning if you want:
$ cat pr98549-2.C
extern "C" void *memcpy(void *, const void *, unsigned long);
inline void copy_mem(unsigned char *out, unsigned char *in, long n) {
memcpy(out, in, n);
}
template <typename T> void typecast_copy(unsigned char out[], T in, long N) {
memcpy(out, in, sizeof(T) * N);
}
template <typename T> void typecast_copy(T out, unsigned char in[], long N) {
memcpy(out, in, sizeof(T) * N);
}
unsigned char *xor_buf_in;
class BlockCipher {
public:
void encrypt(unsigned char[]);
} * compress_n___trans_tmp_2;
class GOST_34_11 {
void compress_n();
BlockCipher m_cipher;
};
long compress_n_blocks;
void GOST_34_11::compress_n() {
for (long i; i != compress_n_blocks; ++i) {
unsigned char S[32], S2[32];
char S_1;
m_cipher.encrypt(S);
S2[13] = S_1;
long x[4], y[4];
typecast_copy(x, S2, 4);
x[0] ^= y[0];
x[1] ^= y[1];
x[2] ^= x[3];
typecast_copy(S, x, 4);
S2[0] = S[4] ^ S[6] ^ 4 ^ S[30];
copy_mem(S, S + 2, 30);
S[30] = S2[0];
{
long x[4];
typecast_copy(x, S, 4);
typecast_copy(y, xor_buf_in, 4);
x[0] ^= y[0];
typecast_copy(S, x, 4);
}
S2[4] = S[6];
memcpy(compress_n___trans_tmp_2, S2, 32);
}
}
$ ~/BIG/bin/ppc64le/dev/shm/buildbot/install/gcc/bin/ppc64le-linux-gnu-gcc -c
-O3 -fPIC -fstack-protector pr98549-2.C
during RTL pass: reload
pr98549-2.C: In member function ‘void GOST_34_11::compress_n()’:
pr98549-2.C:46:1: internal compiler error: in rs6000_emit_le_vsx_store, at
config/rs6000/rs6000.c:9938
46 | }
| ^
0x606cd2 rs6000_emit_le_vsx_store(rtx_def*, rtx_def*, machine_mode)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/config/rs6000/rs6000.c:9938
0x12579e7 gen_movv2di(rtx_def*, rtx_def*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/config/rs6000/vector.md:155
0x99a777 rtx_insn* insn_gen_fn::operator()<rtx_def*, rtx_def*>(rtx_def*,
rtx_def*) const
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/recog.h:407
0x99a777 emit_move_insn_1(rtx_def*, rtx_def*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/expr.c:3766
0x99abac emit_move_insn(rtx_def*, rtx_def*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/expr.c:3936
0xb16bd6 lra_emit_move(rtx_def*, rtx_def*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/lra.c:502
0xb29ed3 curr_insn_transform
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/lra-constraints.c:4547
0xb2aff5 lra_constraints(bool)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/lra-constraints.c:5138
0xb19182 lra(_IO_FILE*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/lra.c:2332
0xad65c9 do_reload
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/ira.c:5811
0xad65c9 execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/ira.c:5997
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.
