https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91301
Bug ID: 91301
Summary: ICE in omp_add_variable on random access iterator
distribute parallel for private (iterator)
Product: gcc
Version: 9.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
The following testcase ICEs with -O2 -fopenmp:
test.C: In function ‘void f3(const I<int>&, const I<int>&)’:
test.C:131:13: internal compiler error: in omp_add_variable, at gimplify.c:6898
131 | baz (*i);
| ^
0x103b300 omp_add_variable
../../gcc/gimplify.c:6895
0x1045f48 gimplify_scan_omp_clauses
../../gcc/gimplify.c:9019
0x104d47a gimplify_omp_parallel
../../gcc/gimplify.c:10417
// { dg-do run }
typedef __PTRDIFF_TYPE__ ptrdiff_t;
extern "C" void abort ();
int a[2000];
template <typename T>
class I
{
public:
typedef ptrdiff_t difference_type;
I ();
~I ();
I (T *);
I (const I &);
T &operator * ();
T *operator -> ();
T &operator [] (const difference_type &) const;
I &operator = (const I &);
I &operator ++ ();
I operator ++ (int);
I &operator -- ();
I operator -- (int);
I &operator += (const difference_type &);
I &operator -= (const difference_type &);
I operator + (const difference_type &) const;
I operator - (const difference_type &) const;
template <typename S> friend bool operator == (I<S> &, I<S> &);
template <typename S> friend bool operator == (const I<S> &, const I<S> &);
template <typename S> friend bool operator < (I<S> &, I<S> &);
template <typename S> friend bool operator < (const I<S> &, const I<S> &);
template <typename S> friend bool operator <= (I<S> &, I<S> &);
template <typename S> friend bool operator <= (const I<S> &, const I<S> &);
template <typename S> friend bool operator > (I<S> &, I<S> &);
template <typename S> friend bool operator > (const I<S> &, const I<S> &);
template <typename S> friend bool operator >= (I<S> &, I<S> &);
template <typename S> friend bool operator >= (const I<S> &, const I<S> &);
template <typename S> friend typename I<S>::difference_type operator - (I<S>
&, I<S> &);
template <typename S> friend typename I<S>::difference_type operator - (const
I<S> &, const I<S> &);
template <typename S> friend I<S> operator + (typename I<S>::difference_type
, const I<S> &);
private:
T *p;
};
template <typename T> I<T>::I () : p (0) {}
template <typename T> I<T>::~I () {}
template <typename T> I<T>::I (T *x) : p (x) {}
template <typename T> I<T>::I (const I &x) : p (x.p) {}
template <typename T> T &I<T>::operator * () { return *p; }
template <typename T> T *I<T>::operator -> () { return p; }
template <typename T> T &I<T>::operator [] (const difference_type &x) const {
return p[x]; }
template <typename T> I<T> &I<T>::operator = (const I &x) { p = x.p; return
*this; }
template <typename T> I<T> &I<T>::operator ++ () { ++p; return *this; }
template <typename T> I<T> I<T>::operator ++ (int) { return I (p++); }
template <typename T> I<T> &I<T>::operator -- () { --p; return *this; }
template <typename T> I<T> I<T>::operator -- (int) { return I (p--); }
template <typename T> I<T> &I<T>::operator += (const difference_type &x) { p +=
x; return *this; }
template <typename T> I<T> &I<T>::operator -= (const difference_type &x) { p -=
x; return *this; }
template <typename T> I<T> I<T>::operator + (const difference_type &x) const {
return I (p + x); }
template <typename T> I<T> I<T>::operator - (const difference_type &x) const {
return I (p - x); }
template <typename T> bool operator == (I<T> &x, I<T> &y) { return x.p == y.p;
}
template <typename T> bool operator == (const I<T> &x, const I<T> &y) { return
x.p == y.p; }
template <typename T> bool operator != (I<T> &x, I<T> &y) { return !(x == y); }
template <typename T> bool operator != (const I<T> &x, const I<T> &y) { return
!(x == y); }
template <typename T> bool operator < (I<T> &x, I<T> &y) { return x.p < y.p; }
template <typename T> bool operator < (const I<T> &x, const I<T> &y) { return
x.p < y.p; }
template <typename T> bool operator <= (I<T> &x, I<T> &y) { return x.p <= y.p;
}
template <typename T> bool operator <= (const I<T> &x, const I<T> &y) { return
x.p <= y.p; }
template <typename T> bool operator > (I<T> &x, I<T> &y) { return x.p > y.p; }
template <typename T> bool operator > (const I<T> &x, const I<T> &y) { return
x.p > y.p; }
template <typename T> bool operator >= (I<T> &x, I<T> &y) { return x.p >= y.p;
}
template <typename T> bool operator >= (const I<T> &x, const I<T> &y) { return
x.p >= y.p; }
template <typename T> typename I<T>::difference_type operator - (I<T> &x, I<T>
&y) { return x.p - y.p; }
template <typename T> typename I<T>::difference_type operator - (const I<T> &x,
const I<T> &y) { return x.p - y.p; }
template <typename T> I<T> operator + (typename I<T>::difference_type x, const
I<T> &y) { return I<T> (x + y.p); }
template <typename T>
class J
{
public:
J(const I<T> &x, const I<T> &y) : b (x), e (y) {}
const I<T> &begin ();
const I<T> &end ();
private:
I<T> b, e;
};
template <typename T> const I<T> &J<T>::begin () { return b; }
template <typename T> const I<T> &J<T>::end () { return e; }
int results[2000];
template <typename T>
void
baz (I<T> &i)
{
if (*i < 0 || *i >= 2000)
abort ();
results[*i]++;
}
static inline void
baz (int i)
{
results[i]++;
}
void
f1 ()
{
#pragma omp simd
for (auto i : a)
baz (i);
}
void
f2 (const I<int> &x, const I<int> &y)
{
I<int> i;
#pragma omp distribute parallel for
for (i = x; i <= y; i += 6)
baz (*i);
}
void
f3 (const I<int> &x, const I<int> &y)
{
I<int> i;
#pragma omp distribute parallel for private (i)
for (i = x; i < y - 1; i = 1 - 6 + 7 + i)
baz (*i);
}
void
f4 (const I<int> &x, const I<int> &y)
{
I<int> i;
#pragma omp teams distribute parallel for lastprivate (i)
for (i = x + 2000 - 64; i > y + 10; --i)
baz (*i);
}
#define check(expr) \
for (int i = 0; i < 2000; i++) \
if (expr) \
{ \
if (results[i] != 1) \
abort (); \
results[i] = 0; \
} \
else if (results[i]) \
abort ()
int
main ()
{
for (int i = 0; i < 2000; i++)
a[i] = i;
f1 ();
check (1);
#pragma omp teams
f2 (&a[10], &a[1990]);
check (i >= 10 && i <= 1990 && (i - 10) % 6 == 0);
#pragma omp teams
f3 (&a[0], &a[1999]);
check (i < 1998 && (i & 1) == 0);
f4 (&a[0], &a[30]);
check (i > 40 && i <= 2000 - 64);
}
