1  /* { dg-do compile } */
       2  /* { dg-options "-foptimize-sibling-calls" } */
       3  /* { dg-final { scan-assembler {brasl\t%r\d+,bar4} } } */
       4  /* { dg-final { scan-assembler {brasl\t%r\d+,bar8} } } */
       5  
       6  /* Parameter E is passed in GPR 6 which is call-saved which prohibits
       7     sibling call optimization.  This must hold true also if the mode of the
       8     parameter is BLKmode.  */
       9  
      10  /* 4 byte */
      11  
      12  typedef struct
      13  {
      14    char x;
      15    char y[3];
      16  } t4;
      17  
      18  extern t4 e4;
      19  
      20  extern void bar4 (int a, int b, int c, int d, t4 e4);
      21  
      22  void foo4 (int a, int b, int c, int d)
      23  {
      24    bar4 (a, b, c, d, e4);
      25  }
      26  
      27  /* 8 byte */
      28  
      29  typedef struct
      30  {
      31    short x;
      32    char y[6];
      33  } t8;
      34  
      35  extern t8 e8;
      36  
      37  extern void bar8 (int a, int b, int c, int d, t8 e8);
      38  
      39  void foo8 (int a, int b, int c, int d)
      40  {
      41    bar8 (a, b, c, d, e8);
      42  }