gcc/testsuite/gcc.dg/fold-plusmult-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fdump-tree-original" } */
   3
   4 int foo (int i)
   5 {
   6   return 2 + i * 4;
   7 }
   8
   9 /* We do _not_ want the above to be canonicalized to (i * 2 + 1) * 2.  */
  10
  11 int bar (int i)
  12 {
  13   return 4 + i * 2;
  14 }
  15
  16 /* But eventually this to be canonicalized to (i + 2) * 2.  */
  17
  18 /* { dg-final { scan-tree-dump "i \\\* 4 \\\+ 2" "original" } } */
  19 /* { dg-final { scan-tree-dump "\\\(i \\\+ 2\\\) \\\* 2" "original" } } */
  20 /* { dg-final { cleanup-tree-dump "original" } } */