Viewing file:  scan-14.C (2.27 KB) -rw-r--r--
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// { dg-require-effective-target size32plus }
// { dg-additional-options "-O2 -fopenmp -fdump-tree-vect-details" }
// { dg-additional-options "-msse2" { target sse2_runtime } }
// { dg-additional-options "-mavx" { target avx_runtime } }
// { dg-final { scan-tree-dump-times "vectorized \[2-6] loops" 2 "vect" { target sse2_runtime } } }
extern "C" void abort ();
int r, a[1024], b[1024], q;
template <typename T, typename U>
__attribute__((noipa)) void
foo (T a, T b, U r)
{
#pragma omp for simd if (0) reduction (inscan, +:r)
for (int i = 0; i < 1024; i++)
{
b[i] = r;
#pragma omp scan exclusive(r)
r += a[i];
}
}
template <typename T>
__attribute__((noipa)) T
bar ()
{
T &s = q;
q = 0;
#pragma omp parallel
#pragma omp for simd reduction (inscan, +:s) simdlen(1)
for (int i = 0; i < 1024; i++)
{
b[i] = s;
#pragma omp scan exclusive(s)
s += 2 * a[i];
}
return s;
}
template <typename T>
__attribute__((noipa)) void
baz (T *a, T *b, T &r)
{
#pragma omp parallel for simd reduction (inscan, +:r)
for (T i = 0; i < 1024; i++)
{
b[i] = r;
#pragma omp scan exclusive(r)
r += a[i];
}
}
template <typename T>
__attribute__((noipa)) int
qux ()
{
T s = q;
q = 0;
#pragma omp parallel for simd reduction (inscan, +:s)
for (int i = 0; i < 1024; i++)
{
b[i] = s;
#pragma omp scan exclusive(s)
s += 2 * a[i];
}
return s;
}
int
main ()
{
int s = 0;
for (int i = 0; i < 1024; ++i)
{
a[i] = i;
b[i] = -1;
asm ("" : "+g" (i));
}
#pragma omp parallel
foo<int *, int &> (a, b, r);
if (r != 1024 * 1023 / 2)
abort ();
for (int i = 0; i < 1024; ++i)
{
if (b[i] != s)
abort ();
else
b[i] = 25;
s += i;
}
if (bar<int> () != 1024 * 1023)
abort ();
s = 0;
for (int i = 0; i < 1024; ++i)
{
if (b[i] != s)
abort ();
else
b[i] = -1;
s += 2 * i;
}
r = 0;
baz<int> (a, b, r);
if (r != 1024 * 1023 / 2)
abort ();
s = 0;
for (int i = 0; i < 1024; ++i)
{
if (b[i] != s)
abort ();
else
b[i] = -25;
s += i;
}
if (qux<int &> () != 1024 * 1023)
abort ();
s = 0;
for (int i = 0; i < 1024; ++i)
{
if (b[i] != s)
abort ();
s += 2 * i;
}
}
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