https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111403
Bug ID: 111403
Summary: LoongArch: Wrong code with -O -mlasx -fopenmp-simd
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: xry111 at gcc dot gnu.org
Target Milestone: ---
Testcase:
struct S
{
int s;
S () : s (0) {}
~S () {}
S (const S &x) { s = x.s; }
S &
operator= (const S &x)
{
s = x.s;
return *this;
}
};
S r, a[1024], b[1024];
#pragma omp declare reduction(+ : S : omp_out.s += omp_in.s)
__attribute__ ((noipa)) void
foo (S *a, S *b)
{
#pragma omp simd reduction(inscan, + : r)
for (int i = 0; i < 1024; i++)
{
r.s += a[i].s;
#pragma omp scan inclusive(r)
b[i] = r;
}
}
int
main ()
{
S s;
for (int i = 0; i < 1024; ++i)
{
a[i].s = i;
b[i].s = -1;
}
foo (a, b);
if (r.s != 1024 * 1023 / 2)
__builtin_abort ();
return 0;
}
$ g++ t.cc -O -mlasx -fopenmp-simd
$ ./a.out
Aborted (core dumped)
