gcc/testsuite/gcc.dg/tree-ssa/ssa-hoist-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-pre" } */
   3
   4 unsigned short f(unsigned short a)
   5 {
   6   if (a & 0x8000)
   7     a <<= 1, a = a ^ 0x1021;
   8   else
   9     a <<= 1;
  10
  11   return a;
  12 }
  13
  14 /* We should hoist and CSE the shift.  */
  15
  16 /* { dg-final { scan-tree-dump-times " << 1;" 1 "pre" } } */