libgomp/testsuite/libgomp.c/scan-20.c

   1 /* { dg-require-effective-target size32plus } */
   2 /* { dg-additional-options "-O2 -fopenmp -fdump-tree-vect-details" } */
   3 /* { dg-additional-options "-msse2" { target sse2_runtime } } */
   4 /* { dg-additional-options "-mavx" { target avx_runtime } } */
   5 /* { dg-final { scan-tree-dump-times "vectorized \[2-6] loops" 2 "vect" { target sse2_runtime } } } */
   6
   7 extern void abort (void);
   8 int r, a[1024], b[1024], x, y, z;
   9
  10 __attribute__((noipa)) void
  11 foo (int *a, int *b)
  12 {
  13   #pragma omp for simd reduction (inscan, +:r) lastprivate (conditional: z) firstprivate (x) private (y) simdlen(1)
  14   for (int i = 0; i < 1024; i++)
  15     {
  16       { b[i] = r; if ((i & 1) == 0 && i < 937) z = r; }
  17       #pragma omp scan exclusive(r)
  18       { y = a[i]; r += y + x + 12; }
  19     }
  20 }
  21
  22 __attribute__((noipa)) int
  23 bar (void)
  24 {
  25   int s = 0;
  26   #pragma omp parallel
  27   #pragma omp for simd reduction (inscan, +:s) firstprivate (x) private (y) lastprivate (z) if (0)
  28   for (int i = 0; i < 1024; i++)
  29     {
  30       { y = s; b[i] = y + x + 12; }
  31       #pragma omp scan exclusive(s)
  32       { y = 2 * a[i]; s += y; z = y; }
  33     }
  34   return s;
  35 }
  36
  37 __attribute__((noipa)) void
  38 baz (int *a, int *b)
  39 {
  40   #pragma omp parallel for simd reduction (inscan, +:r) firstprivate (x) lastprivate (x)
  41   for (int i = 0; i < 1024; i++)
  42     {
  43       b[i] = r;
  44       #pragma omp scan exclusive(r)
  45       { r += a[i]; if (i == 1023) x = 29; }
  46     }
  47 }
  48
  49 __attribute__((noipa)) int
  50 qux (void)
  51 {
  52   int s = 0;
  53   #pragma omp parallel for simd reduction (inscan, +:s) lastprivate (conditional: x, y)
  54   for (int i = 0; i < 1024; i++)
  55     {
  56       { b[i] = s; if ((a[i] & 1) == 0 && i < 829) y = a[i]; }
  57       #pragma omp scan exclusive(s)
  58       { s += 2 * a[i]; if ((a[i] & 1) == 1 && i < 825) x = a[i]; }
  59     }
  60   return s;
  61 }
  62
  63 int
  64 main ()
  65 {
  66   int s = 0;
  67   x = -12;
  68   for (int i = 0; i < 1024; ++i)
  69     {
  70       a[i] = i;
  71       b[i] = -1;
  72       asm ("" : "+g" (i));
  73     }
  74   #pragma omp parallel
  75   foo (a, b);
  76   if (r != 1024 * 1023 / 2 || x != -12 || z != b[936])
  77     abort ();
  78   for (int i = 0; i < 1024; ++i)
  79     {
  80       if (b[i] != s)
  81         abort ();
  82       else
  83         b[i] = 25;
  84       s += i;
  85     }
  86   if (bar () != 1024 * 1023 || x != -12 || z != 2 * 1023)
  87     abort ();
  88   s = 0;
  89   for (int i = 0; i < 1024; ++i)
  90     {
  91       if (b[i] != s)
  92         abort ();
  93       else
  94         b[i] = -1;
  95       s += 2 * i;
  96     }
  97   r = 0;
  98   baz (a, b);
  99   if (r != 1024 * 1023 / 2 || x != 29)
 100     abort ();
 101   s = 0;
 102   for (int i = 0; i < 1024; ++i)
 103     {
 104       if (b[i] != s)
 105         abort ();
 106       else
 107         b[i] = -25;
 108       s += i;
 109     }
 110   if (qux () != 1024 * 1023 || x != 823 || y != 828)
 111     abort ();
 112   s = 0;
 113   for (int i = 0; i < 1024; ++i)
 114     {
 115       if (b[i] != s)
 116         abort ();
 117       s += 2 * i;
 118     }
 119   return 0;
 120 }