https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98549
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |11.0
Priority|P3 |P1
CC| |segher at gcc dot gnu.org
Assignee|marxin at gcc dot gnu.org |unassigned at gcc dot
gnu.org
Status|ASSIGNED |NEW
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Reduced test-case:
$ 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 long xor_buf_y[1];
inline void xor_buf(unsigned char out[], unsigned char in[]) {
unsigned long x[4];
typecast_copy(x, out, 4);
typecast_copy(xor_buf_y, in, 4);
x[0] ^= xor_buf_y[0];
x[3] ^= 3;
typecast_copy(out, x, 4);
}
char compress_n_S_10, compress_n_S_8, compress_n_S_27, compress_n_S_25,
compress_n_S_0;
unsigned char compress_n___trans_tmp_1;
unsigned char *compress_n_input;
void compress_n() {
unsigned char S[32], S2[32];
S2[9] = compress_n_S_25;
S2[13] = S[7];
S2[14] = S[28];
S2[15] = S2[16] = S[0];
S2[17] = 9 ^ S[31];
S2[18] = S[8];
S2[19] = S[29];
S2[21] = compress_n_S_27;
S2[22] = compress_n_S_10;
S2[23] = S[1];
S2[24] = S[6];
S2[25] = S[23];
S2[6] = S[2] ^ compress_n_S_8;
S2[7] = S[9];
S2[8] = S[22];
S2[29] = S[11] ^ S[17];
S2[0] = S[12] ^ compress_n_S_0;
S2[1] = S[5] ^ S[3];
long x[4], y[4];
typecast_copy(x, S2, 4);
typecast_copy(y, compress_n_input, 4);
x[0] ^= y[0];
x[1] ^= y[1];
x[2] ^= x[3] ^= y[3];
typecast_copy(S, x, 4);
S2[1] = 5 ^ S[7];
copy_mem(S, S + 2, 30);
S[31] = S2[1];
xor_buf(S, &compress_n___trans_tmp_1);
S2[2] = S2[3] = S2[4] = S[24];
S2[5] = S2[0] = compress_n_S_8 ^ S[4] ^ S[28];
char *__trans_tmp_2;
memcpy(__trans_tmp_2, S2, 32);
}
$ g++ pr98549.C -c -O3 -fPIC -fstack-protector
In function ‘void typecast_copy(T, unsigned char*, long int) [with T = long
unsigned int*]’,
inlined from ‘void xor_buf(unsigned char*, unsigned char*)’ at
pr98549.C:15:16,
inlined from ‘void compress_n()’ at pr98549.C:54:10:
pr98549.C:9:9: warning: ‘void* memcpy(void*, const void*, long unsigned int)’
writing 32 bytes into a region of size 8 overflows the destination
[-Wstringop-overflow=]
9 | memcpy(out, in, sizeof(T) * N);
| ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
pr98549.C: In function ‘void compress_n()’:
pr98549.C:11:15: note: destination object ‘xor_buf_y’ of size 8
11 | unsigned long xor_buf_y[1];
| ^~~~~~~~~
during RTL pass: reload
pr98549.C:59:1: internal compiler error: in rs6000_emit_le_vsx_store, at
config/rs6000/rs6000.c:9938
59 | }
| ^
0x606caa 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
0x1252e57 gen_movv2di(rtx_def*, rtx_def*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/config/rs6000/vector.md:155
0x999ce7 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
0x999ce7 emit_move_insn_1(rtx_def*, rtx_def*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/expr.c:3764
0x99a11c emit_move_insn(rtx_def*, rtx_def*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/expr.c:3934
0xb16086 lra_emit_move(rtx_def*, rtx_def*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/lra.c:502
0xb29343 curr_insn_transform
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/lra-constraints.c:4547
0xb2a465 lra_constraints(bool)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/lra-constraints.c:5138
0xb18632 lra(_IO_FILE*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/lra.c:2329
0xad5a89 do_reload
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/ira.c:5802
0xad5a89 execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-ppc64le/build/gcc/ira.c:5988
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with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
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