https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71294
Bug ID: 71294
Summary: [6/7 Regression] ICE in gen_add2_insn, at
optabs.c:4442 on powerpc64le-linux
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Hello.
Following code snippet fails with:
./xgcc -B. -O3 -fstack-protector ice2.ii
ice2.ii: In function ‘void fn1()’:
ice2.ii:51:1: internal compiler error: in gen_add2_insn, at optabs.c:4442
}
^
0xc00edb gen_add2_insn(rtx_def*, rtx_def*)
../../gcc/optabs.c:4442
0xc768b4 gen_reload
../../gcc/reload1.c:8710
0xc7a35e emit_input_reload_insns
../../gcc/reload1.c:7664
0xc7b3bc do_input_reload
../../gcc/reload1.c:7950
0xc7b3bc emit_reload_insns
../../gcc/reload1.c:8142
0xc7dd69 reload_as_needed
../../gcc/reload1.c:4661
0xc81a7b reload(rtx_insn*, int)
../../gcc/reload1.c:1062
0xb39da2 do_reload
../../gcc/ira.c:5393
0xb39da2 execute
../../gcc/ira.c:5565
$ cat ice2.ii
class A;
template <typename _Tp, int m, int n> class B {
public:
_Tp val[m * n];
};
class C {
public:
C(A);
};
struct D {
D();
unsigned long &operator[](int);
unsigned long *p;
};
class A {
public:
template <typename _Tp, int m, int n> A(const B<_Tp, m, n> &, bool);
int rows, cols;
unsigned char *data;
unsigned char *datastart;
unsigned char *dataend;
unsigned char *datalimit;
D step;
};
template <typename _Tp, int m, int n>
A::A(const B<_Tp, m, n> &p1, bool)
: rows(m), cols(n) {
step[0] = cols * sizeof(_Tp);
datastart = data = (unsigned char *)p1.val;
datalimit = dataend = datastart + rows * step[0];
}
class F {
public:
static void compute(C);
template <typename _Tp, int m, int n, int nm>
static void compute(const B<_Tp, m, n> &, B<_Tp, nm, 1> &, B<_Tp, m, nm> &,
B<_Tp, n, nm> &);
};
D::D() {}
unsigned long &D::operator[](int p1) { return p[p1]; }
template <typename _Tp, int m, int n, int nm>
void F::compute(const B<_Tp, m, n> &, B<_Tp, nm, 1> &, B<_Tp, m, nm> &,
B<_Tp, n, nm> &p4) {
A a(p4, false);
compute(a);
}
void fn1() {
B<double, 4, 4> b, c, e;
B<double, 4, 1> d;
F::compute(b, d, c, e);
}
gcc version 5.2.1 works fine.
Martin
