gcc/testsuite/gcc.dg/tree-ssa/pr38533.c

   1 /* PR middle-end/38533 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 --param tree-reassoc-width=1 -fdump-tree-reassoc1" } */
   4
   5 #define A asm volatile ("" : "=r" (f) : "0" (0)); e |= f;
   6 #define B A A A A A A A A A A A
   7 #define C B B B B B B B B B B B
   8
   9 int
  10 foo (void)
  11 {
  12   int e = 0, f;
  13   C C B B B B B A A A A A A
  14   return e;
  15 }
  16
  17 int
  18 main (void)
  19 {
  20   if (foo ())
  21     __builtin_abort ();
  22   return 0;
  23 }
  24
  25 /* Verify that reassoc hasn't increased register pressure too much
  26    by moving all bitwise ors after the last __asm__.  There should
  27    be exactly 2 (first) __asm__ stmts with no intervening stmts,
  28    all others should have some bitwise or in between.  */
  29 /* { dg-final { scan-tree-dump-times "__asm__\[^;\n]*;\n *__asm__" 1 "reassoc1"} } */