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

   1 /* { dg-options "-O3 -fdump-tree-lversion-details" } */
   2 /* { dg-require-effective-target size32plus } */
   3
   4 /* The simplest IV case.  */
   5
   6 void
   7 f1 (double *x, int stepx, int n)
   8 {
   9   for (int i = 0; i < n; ++i)
  10     x[stepx * i] = 100;
  11 }
  12
  13 void
  14 f2 (double *x, int stepx, int limit)
  15 {
  16   for (int i = 0; i < limit; i += stepx)
  17     x[i] = 100;
  18 }
  19
  20 void
  21 f3 (double *x, int stepx, int limit)
  22 {
  23   for (double *y = x; y < x + limit; y += stepx)
  24     *y = 100;
  25 }
  26
  27 void
  28 f4 (double *x, int stepx, unsigned int n)
  29 {
  30   for (unsigned int i = 0; i < n; ++i)
  31     x[stepx * i] = 100;
  32 }
  33
  34 void
  35 f5 (double *x, int stepx, unsigned int limit)
  36 {
  37   for (unsigned int i = 0; i < limit; i += stepx)
  38     x[i] = 100;
  39 }
  40
  41 void
  42 f6 (double *x, int stepx, unsigned int limit)
  43 {
  44   for (double *y = x; y < x + limit; y += stepx)
  45     *y = 100;
  46 }
  47
  48 #if __SIZEOF_SIZE_T__ < 4
  49 double x[1000];
  50 #else
  51 double x[10000];
  52 #endif
  53
  54 void
  55 g1 (int stepx, int n)
  56 {
  57   for (int i = 0; i < n; ++i)
  58     x[stepx * i] = 100;
  59 }
  60
  61 void
  62 g2 (int stepx, int limit)
  63 {
  64   for (int i = 0; i < limit; i += stepx)
  65     x[i] = 100;
  66 }
  67
  68 void
  69 g3 (int stepx, int limit)
  70 {
  71   for (double *y = x; y < x + limit; y += stepx)
  72     *y = 100;
  73 }
  74
  75 void
  76 g4 (int stepx, unsigned int n)
  77 {
  78   for (unsigned int i = 0; i < n; ++i)
  79     x[stepx * i] = 100;
  80 }
  81
  82 void
  83 g5 (int stepx, unsigned int limit)
  84 {
  85   for (unsigned int i = 0; i < limit; i += stepx)
  86     x[i] = 100;
  87 }
  88
  89 void
  90 g6 (int stepx, unsigned int limit)
  91 {
  92   for (double *y = x; y < x + limit; y += stepx)
  93     *y = 100;
  94 }
  95
  96 /* { dg-final { scan-tree-dump-times {want to version containing loop} 12 "lversion" } } */
  97 /* { dg-final { scan-tree-dump-times {versioned this loop} 12 "lversion" } } */