text: /* { dg-do compile } */
  /* { dg-options "-O2 -fdump-tree-ethread-details" } */
  /* { dg-final { scan-tree-dump "FSM" "ethread" } } */
  
  typedef struct rtx_def *rtx;
  typedef const struct rtx_def *const_rtx;
  enum rtx_code
  {
    UNKNOWN, VALUE, DEBUG_EXPR, EXPR_LIST, INSN_LIST, SEQUENCE, ADDRESS,
      DEBUG_INSN, INSN, JUMP_INSN, CALL_INSN, BARRIER, CODE_LABEL, NOTE,
      COND_EXEC, PARALLEL, ASM_INPUT, ASM_OPERANDS, UNSPEC, UNSPEC_VOLATILE,
      ADDR_VEC, ADDR_DIFF_VEC, PREFETCH, SET, USE, CLOBBER, CALL, RETURN,
      EH_RETURN, TRAP_IF, CONST_INT, CONST_FIXED, CONST_DOUBLE, CONST_VECTOR,
      CONST_STRING, CONST, PC, REG, SCRATCH, SUBREG, STRICT_LOW_PART, CONCAT,
      CONCATN, MEM, LABEL_REF, SYMBOL_REF, CC0, IF_THEN_ELSE, COMPARE, PLUS,
      MINUS, NEG, MULT, SS_MULT, US_MULT, DIV, SS_DIV, US_DIV, MOD, UDIV, UMOD,
      AND, IOR, XOR, NOT, ASHIFT, ROTATE, ASHIFTRT, LSHIFTRT, ROTATERT, SMIN,
      SMAX, UMIN, UMAX, PRE_DEC, PRE_INC, POST_DEC, POST_INC, PRE_MODIFY,
      POST_MODIFY, NE, EQ, GE, GT, LE, LT, GEU, GTU, LEU, LTU, UNORDERED,
      ORDERED, UNEQ, UNGE, UNGT, UNLE, UNLT, LTGT, SIGN_EXTEND, ZERO_EXTEND,
      TRUNCATE, FLOAT_EXTEND, FLOAT_TRUNCATE, FLOAT, FIX, UNSIGNED_FLOAT,
      UNSIGNED_FIX, FRACT_CONVERT, UNSIGNED_FRACT_CONVERT, SAT_FRACT,
      UNSIGNED_SAT_FRACT, ABS, SQRT, BSWAP, FFS, CLZ, CTZ, POPCOUNT, PARITY,
      SIGN_EXTRACT, ZERO_EXTRACT, HIGH, LO_SUM, VEC_MERGE, VEC_SELECT,
      VEC_CONCAT, VEC_DUPLICATE, SS_PLUS, US_PLUS, SS_MINUS, SS_NEG, US_NEG,
      SS_ABS, SS_ASHIFT, US_ASHIFT, US_MINUS, SS_TRUNCATE, US_TRUNCATE, FMA,
      VAR_LOCATION, DEBUG_IMPLICIT_PTR, ENTRY_VALUE, LAST_AND_UNUSED_RTX_CODE
  };
  union rtunion_def
  {
    rtx rt_rtx;
  };
  typedef union rtunion_def rtunion;
  struct rtx_def
  {
    int code;
    union u
    {
      rtunion fld[1];
    }
    u;
  };
  
  unsigned int rtx_cost (rtx, enum rtx_code, unsigned char);
  rtx single_set_2 (const_rtx, rtx);
  
  unsigned
  seq_cost (const_rtx seq, unsigned char speed)
  {
    unsigned cost = 0;
    rtx set;
    for (; seq; seq = (((seq)->u.fld[2]).rt_rtx))
      {
        set =
  	(((((enum rtx_code) (seq)->code) == INSN)
  	  || (((enum rtx_code) (seq)->code) == DEBUG_INSN)
  	  || (((enum rtx_code) (seq)->code) == JUMP_INSN)
  	  || (((enum rtx_code) (seq)->code) ==
  	      CALL_INSN)) ? (((enum rtx_code) ((((seq)->u.fld[4]).rt_rtx))->
  			      code) ==
  			     SET ? (((seq)->u.fld[4]).
  				    rt_rtx) : single_set_2 (seq,
  							    (((seq)->u.
  							      fld[4]).
  							     rt_rtx))) : (rtx)
  	 0);
        if (set)
  	cost += rtx_cost (set, SET, speed);
      }
  }
  