https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93187
Bug ID: 93187
Summary: [10 Regression] ICE in extract_insn, at recog.c:2294
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: doko at debian dot org
Target Milestone: ---
seen on x86_64-linux-gnu building pdns-recursor with r279880, and hardening
options.
$ cat syncres.ii
# 1 "" 3
class a;
class b;
struct c {
operator()(b, const b &);
};
struct d {
typedef *aa;
};
struct e {
c g;
};
struct h {
typedef h ab;
h(d::aa);
friend operator==(ab &, const &);
};
template <typename i, typename> class j {
typedef d *k;
e l;
k ac();
i ad;
public:
typedef h ae;
ae m(k, const i &);
ae ag(const i &);
};
template <typename i, typename f> h j<i, f>::m(k n, const i &o) {
while (n)
if (l.g(ad, o))
n = 0;
return 0;
}
template <typename i, typename f> h j<i, f>::ag(const i &n) {
d *r = ac();
ae p = m(r, n);
return p == 0 ? 0 : p;
}
template <typename, typename f> class s {
j<b, f> al;
public:
b &q;
void ag() { al.ag(q); }
};
enum am { an };
template <typename, am = an> class ao;
template <int> class G {
public:
using ar = s<int, a>;
ar *operator->() {
ar *as = static_cast<ao<s<int, a>> *>(this)->at();
return as;
}
};
template <typename, am au> class ao : public G<au> {
public:
using ar = s<int, a>;
ar *at() { return av; }
ar *av;
int aw;
};
class b {
public:
ax();
};
class t {
struct ba {
ao<int> bb;
} static thread_local bc;
bd() const;
};
thread_local t::ba t::bc;
b be;
t::bd() const {
do
bc.bb->ag();
while (be.ax());
}
$ g++ -c -O2 -Wall syncres.ii
: In member function 'int t::bd() const':
:79:1: error: unrecognizable insn:
(insn 125 3 99 2 (parallel [
(set (mem/v/f/c:DI (plus:DI (reg/f:DI 7 sp)
(const_int 24 [0x18])) [13 D.2787+0 S8 A64])
(unspec:DI [
(mem/v/f:DI (const_int 40 [0x28]) [14
MEM[(<address-space-1> long unsigned int *)40B]+0 S8 A64 AS1])
] UNSPEC_SP_SET))
(set (reg:DI 0 ax [105])
(const:DI (unspec:DI [
(symbol_ref:DI ("_ZN1t2bcE") [flags 0x2a] <var_decl
0x7fd376c83480 bc>)
] UNSPEC_NTPOFF)))
(clobber (reg:CC 17 flags))
]) -1
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil)))
during RTL pass: cprop_hardreg
:79:1: internal compiler error: in extract_insn, at recog.c:2294
0x5c6f01 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../src/gcc/rtl-error.c:108
0x5c6f23 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
../../src/gcc/rtl-error.c:116
0x5c605c extract_insn(rtx_insn*)
../../src/gcc/recog.c:2294
0xb7a0ef extract_constrain_insn(rtx_insn*)
../../src/gcc/recog.c:2193
0xb82f9c copyprop_hardreg_forward_1
../../src/gcc/regcprop.c:802
0xb83e26 execute
../../src/gcc/regcprop.c:1367
Please submit a full bug report,
with preprocessed source if appropriate.
