1  /* Check that eliminable compare-instructions are eliminated. */
       2  /* { dg-do compile } */
       3  /* { dg-skip-if "" { "*-*-*" } { "-march=v0" } { "" } } */
       4  /* { dg-options "-O2" { target march_option } } */
       5  /* { dg-options "-O2 -march=v10" { target { ! march_option } } } */
       6  /* { dg-final { scan-assembler-not "\tcmp|\ttest" } } */
       7  
       8  #ifndef t
       9  #define t int
      10  #endif
      11  #ifndef t2
      12  #define t2 t
      13  #endif
      14  #ifndef t3
      15  #define t3 t
      16  #endif
      17  #ifndef op
      18  #define op(xx) __builtin_clz(xx)
      19  #endif
      20  
      21  extern t3 x;
      22  
      23  t2 f(t a, t2 *b, t2 *d)
      24  {
      25    t2 c = op(a);
      26  
      27    *b = c;
      28  
      29    if (c != 0)
      30      *d = c;
      31  
      32    return c;
      33  }