gcc/testsuite/gcc.dg/pr41783.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -fdump-tree-pre -fno-tree-loop-im" } */
   3 int db[100];
   4 int a_global_var, fact;
   5 int main()
   6 {
   7   int i,j=0;
   8   do
   9     {
  10       for (i=0; i<100; ++i)
  11         db[i] = i;
  12       fact = a_global_var * i;
  13     }
  14   while (j++ < 100);
  15 }
  16 /* We want to have exactly one load (not two) from a_global_var,
  17    and we want that load to be into a PRE temporary.  */
  18 /* { dg-final { scan-tree-dump-times "= a_global_var;" 1 "pre" } } */
  19 /* { dg-final { scan-tree-dump "pretmp\[^\\n\]* = a_global_var;" "pre" } } */