gcc/testsuite/gcc.dg/tree-ssa/ldist-20.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -ftree-loop-distribute-patterns -fdump-tree-ldist-details" } */
   3
   4 void foo(char *);
   5 void my_memcpy (void *q, unsigned int n)
   6 {
   7   unsigned i;
   8   char p[1024];
   9   for (i = 0; i < n; ++i)
  10     ((char *)p)[i] = ((char *)q)[i];
  11   foo(p);
  12 }
  13
  14 struct S { int i; int j; };
  15
  16 void my_memcpy2 (void *q, unsigned int n)
  17 {
  18   unsigned i;
  19   char p[1024];
  20   for (i = 0; i < n; ++i)
  21     ((struct S *)p)[i] = ((struct S *)q)[i];
  22   foo(p);
  23 }
  24
  25 char p[1024];
  26 void my_memmove (unsigned int n)
  27 {
  28   unsigned i;
  29   for (i = 0; i < n; ++i)
  30     p[i] = p[i+1];
  31   foo(p);
  32 }
  33
  34
  35 /* { dg-final { scan-tree-dump-times "generated memcpy" 2 "ldist" } } */
  36 /* { dg-final { scan-tree-dump-times "generated memmove" 1 "ldist" } } */
  37 /* { dg-final { cleanup-tree-dump "ldist" } } */