gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-9.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fno-tree-sra -fdump-tree-fre1-stats" } */
   3
   4 union loc {
   5     unsigned reg;
   6     signed offset;
   7 };
   8 void __frame_state_for2 (volatile char *state_in)
   9 {
  10     union loc fs;
  11     {
  12         *state_in = fs.reg;
  13         *state_in = fs.offset;
  14     }
  15 }
  16 void __frame_state_for1 (volatile char *state_in)
  17 {
  18     union loc fs;
  19     for (;;)
  20     {
  21         *state_in = fs.offset;
  22         *state_in = fs.reg;
  23     }
  24 }
  25
  26 /* { dg-final { scan-tree-dump-times "Eliminated: 2" 2 "fre1" } } */
  27 /* { dg-final { scan-tree-dump-times "Insertions: 1" 2 "fre1" } } */