https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98282
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Last reconfirmed| |2020-12-14
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase that ICEs with -O2 even with current trunk in PRE:
template <typename> struct g;
template <typename b> struct g<b &> { typedef b c; };
template <typename b> typename g<b>::c &&d(b &&e) {
return static_cast<typename g<b>::c &&>(e);
}
void *operator new(__SIZE_TYPE__, void *f) { return f; }
struct h;
struct k {
using i = h *;
};
struct D {
k::i j;
};
struct p : D {
p(p &&) : D() {}
};
struct r {
using l = int;
r(r &&) : ad() {}
l *ad;
};
struct s {
static s m();
};
struct t {
template <typename ah> void operator=(ah);
};
struct I {
template <typename o> void q(o ai) {
*ai = aj();
s::m();
}
h aj();
};
template <typename...> class as;
struct J {
int a;
char av;
};
template <typename...> struct aw : J {
void ax(...) {}
};
template <typename... ay, typename an, typename... n>
struct aw<as<ay...>, an, n...> : aw<as<ay...>, n...> {
using az = as<ay...>;
using ba = aw<az, n...>;
char bb;
an &bc() { return *reinterpret_cast<an *>(this); }
void ax(az *bd) {
if (bb)
new (bd) an(d(bc()));
ba::ax(bd);
}
};
template <typename... n> struct as : aw<as<n...>, n...> {
as();
as(as &&be) { be.ax(this); }
void operator=(as be) { be.ax(this); }
};
struct h {
as<decltype(nullptr), r, p> bg;
};
using bh = t;
struct u {
bh bj;
};
I bk();
template <typename> void bl() {
h a;
bk().q(&a);
}
template <typename> void bn(int) {
u b;
b.bj = bl<int>;
}
void bp() { bn<int>(0); }
/usr/src/gcc/obj/gcc/cc1plus -quiet -O2 pr98282.ii
during GIMPLE pass: pre
pr98282.ii: In function ‘void bl() [with <template-parameter-1-1> = int]’:
pr98282.ii:68:26: internal compiler error: Segmentation fault
68 | template <typename> void bl() {
| ^~
0x17098ba crash_signal
../../gcc/toplev.c:327
0x9dc372 contains_struct_check(tree_node const*, tree_node_structure_enum, char
const*, int, char const*)
../../gcc/tree.h:3707
0xa7089b wi::to_wide(tree_node const*)
../../gcc/tree.h:5983
0x19caa55 compute_avail
../../gcc/tree-ssa-pre.c:4214
0x19cb145 execute
../../gcc/tree-ssa-pre.c:4408
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with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
