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/* { dg-do compile } */

/* { dg-options "-O1 -fdump-tree-dom2" } */

typedef struct rs6000_stack {

  int first_gp_reg_save;

} rs6000_stack_t;

extern char regs_ever_live[113];

extern rs6000_stack_t *rs6000_stack_info (void);

void

rs6000_emit_prologue (int i, rs6000_stack_t *info)

{

  if (regs_ever_live[info->first_gp_reg_save + i] || i+info->first_gp_reg_save)

    gen_rtx_REG (info->first_gp_reg_save + i);

}

/* There should be precisely one load of first_gp_reg_save.  If there is

   more than one, then the dominator optimizations failed.  */

/* { dg-final { scan-tree-dump-times "first_gp_reg_save" 1 "dom2"} } */

/* There should be precisely one addition.  If there is more than one, then

   the dominator optimizations failed, most likely due to not handling

   commutative operands correctly.  */

/* { dg-final { scan-tree-dump-times "\\+" 1 "dom2"} } */

/* { dg-final { cleanup-tree-dump "dom2" } } */