gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-64.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-fre1-details -fdump-tree-dse1-details" } */
   3
   4 int foo(unsigned char c, signed char d, int e)
   5 {
   6   int res = 0;
   7   char x[256];
   8   __builtin_memset (x, c, 256);
   9   res += x[54];
  10   __builtin_memset (x, d, 256);
  11   res += x[54];
  12   __builtin_memset (x, e, 256);
  13   res += x[54];
  14   return res;
  15 }
  16
  17 /* The loads get replaced with conversions from c or d and e.  */
  18 /* { dg-final { scan-tree-dump-times "Inserted" 2 "fre1" } } */
  19 /* { dg-final { scan-tree-dump-times "Replaced x" 3 "fre1" } } */
  20 /* And the memsets removed as dead.  */
  21 /* { dg-final { scan-tree-dump-times "Deleted dead call" 3 "dse1" } } */