gcc/testsuite/gcc.dg/loop-versioning-1.c

   1 /* { dg-options "-O3 -fdump-tree-lversion-details" } */
   2
   3 /* The simplest IV case.  */
   4
   5 void
   6 f1 (double *x, int stepx, int n)
   7 {
   8   for (int i = 0; i < n; ++i)
   9     x[stepx * i] = 100;
  10 }
  11
  12 void
  13 f2 (double *x, int stepx, int limit)
  14 {
  15   for (int i = 0; i < limit; i += stepx)
  16     x[i] = 100;
  17 }
  18
  19 void
  20 f3 (double *x, int stepx, int limit)
  21 {
  22   for (double *y = x; y < x + limit; y += stepx)
  23     *y = 100;
  24 }
  25
  26 void
  27 f4 (double *x, int stepx, unsigned int n)
  28 {
  29   for (unsigned int i = 0; i < n; ++i)
  30     x[stepx * i] = 100;
  31 }
  32
  33 void
  34 f5 (double *x, int stepx, unsigned int limit)
  35 {
  36   for (unsigned int i = 0; i < limit; i += stepx)
  37     x[i] = 100;
  38 }
  39
  40 void
  41 f6 (double *x, int stepx, unsigned int limit)
  42 {
  43   for (double *y = x; y < x + limit; y += stepx)
  44     *y = 100;
  45 }
  46
  47 double x[10000];
  48
  49 void
  50 g1 (int stepx, int n)
  51 {
  52   for (int i = 0; i < n; ++i)
  53     x[stepx * i] = 100;
  54 }
  55
  56 void
  57 g2 (int stepx, int limit)
  58 {
  59   for (int i = 0; i < limit; i += stepx)
  60     x[i] = 100;
  61 }
  62
  63 void
  64 g3 (int stepx, int limit)
  65 {
  66   for (double *y = x; y < x + limit; y += stepx)
  67     *y = 100;
  68 }
  69
  70 void
  71 g4 (int stepx, unsigned int n)
  72 {
  73   for (unsigned int i = 0; i < n; ++i)
  74     x[stepx * i] = 100;
  75 }
  76
  77 void
  78 g5 (int stepx, unsigned int limit)
  79 {
  80   for (unsigned int i = 0; i < limit; i += stepx)
  81     x[i] = 100;
  82 }
  83
  84 void
  85 g6 (int stepx, unsigned int limit)
  86 {
  87   for (double *y = x; y < x + limit; y += stepx)
  88     *y = 100;
  89 }
  90
  91 /* { dg-final { scan-tree-dump-times {want to version containing loop} 12 "lversion" } } */
  92 /* { dg-final { scan-tree-dump-times {versioned this loop} 12 "lversion" } } */