1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fno-code-hoisting -fdump-tree-optimized -w" } */
       3  
       4  typedef struct rtx_def *rtx;
       5  enum rtx_code
       6  {
       7    UNKNOWN, VALUE, DEBUG_EXPR, EXPR_LIST, INSN_LIST, SEQUENCE, ADDRESS,
       8    DEBUG_INSN, INSN, JUMP_INSN, CALL_INSN, BARRIER, CODE_LABEL, NOTE,
       9    COND_EXEC, PARALLEL, ASM_INPUT, ASM_OPERANDS, UNSPEC, UNSPEC_VOLATILE,
      10    ADDR_VEC, ADDR_DIFF_VEC, PREFETCH, SET, USE, CLOBBER, CALL, RETURN,
      11    EH_RETURN, TRAP_IF, CONST_INT, CONST_FIXED, CONST_DOUBLE, CONST_VECTOR,
      12    CONST_STRING, CONST, PC, REG, SCRATCH, SUBREG, STRICT_LOW_PART, CONCAT,
      13    CONCATN, MEM, LABEL_REF, SYMBOL_REF, CC0, IF_THEN_ELSE, COMPARE, PLUS,
      14    MINUS, NEG, MULT, SS_MULT, US_MULT, DIV, SS_DIV, US_DIV, MOD, UDIV, UMOD,
      15    AND, IOR, XOR, NOT, ASHIFT, ROTATE, ASHIFTRT, LSHIFTRT, ROTATERT, SMIN,
      16    SMAX, UMIN, UMAX, PRE_DEC, PRE_INC, POST_DEC, POST_INC, PRE_MODIFY,
      17    POST_MODIFY, NE, EQ, GE, GT, LE, LT, GEU, GTU, LEU, LTU, UNORDERED,
      18    ORDERED, UNEQ, UNGE, UNGT, UNLE, UNLT, LTGT, SIGN_EXTEND, ZERO_EXTEND,
      19    TRUNCATE, FLOAT_EXTEND, FLOAT_TRUNCATE, FLOAT, FIX, UNSIGNED_FLOAT,
      20    UNSIGNED_FIX, FRACT_CONVERT, UNSIGNED_FRACT_CONVERT, SAT_FRACT,
      21    UNSIGNED_SAT_FRACT, ABS, SQRT, BSWAP, FFS, CLZ, CTZ, POPCOUNT, PARITY,
      22    SIGN_EXTRACT, ZERO_EXTRACT, HIGH, LO_SUM, VEC_MERGE, VEC_SELECT,
      23    VEC_CONCAT, VEC_DUPLICATE, SS_PLUS, US_PLUS, SS_MINUS, SS_NEG, US_NEG,
      24    SS_ABS, SS_ASHIFT, US_ASHIFT, US_MINUS, SS_TRUNCATE, US_TRUNCATE, FMA,
      25    VAR_LOCATION, DEBUG_IMPLICIT_PTR, ENTRY_VALUE, LAST_AND_UNUSED_RTX_CODE
      26  };
      27  enum rtx_class
      28  {
      29    RTX_COMPARE, RTX_COMM_COMPARE, RTX_BIN_ARITH, RTX_COMM_ARITH, RTX_UNARY,
      30    RTX_EXTRA, RTX_MATCH, RTX_INSN, RTX_OBJ, RTX_CONST_OBJ, RTX_TERNARY,
      31    RTX_BITFIELD_OPS, RTX_AUTOINC
      32  };
      33  extern const unsigned char rtx_length[((int) LAST_AND_UNUSED_RTX_CODE)];
      34  extern const enum rtx_class rtx_class[((int) LAST_AND_UNUSED_RTX_CODE)];
      35  union rtunion_def
      36  {
      37    rtx rt_rtx;
      38  };
      39  typedef union rtunion_def rtunion;
      40  struct rtx_def
      41  {
      42    enum rtx_code code:8;
      43    union u
      44    {
      45      rtunion fld[1];
      46    }
      47    u;
      48  };
      49  struct cse_reg_info
      50  {
      51    unsigned int timestamp;
      52    int reg_qty;
      53    int reg_tick;
      54    int reg_in_table;
      55    unsigned int subreg_ticked;
      56  };
      57  static struct cse_reg_info *cse_reg_info_table;
      58  static unsigned int cse_reg_info_timestamp;
      59  
      60  static __inline__ struct cse_reg_info *
      61  get_cse_reg_info (unsigned int regno)
      62  {
      63    struct cse_reg_info *p = &cse_reg_info_table[regno];
      64    if (p->timestamp != cse_reg_info_timestamp)
      65      cse_reg_info_table[regno].timestamp = cse_reg_info_timestamp;
      66  }
      67  
      68  int
      69  mention_regs (rtx x)
      70  {
      71    enum rtx_code code;
      72    int i, j;
      73    const char *fmt;
      74    int changed = 0;
      75    code = ((x)->code);
      76    if (code == SUBREG
      77        && ((((((x)->u.fld[0]).rt_rtx))->code) == REG))
      78      {
      79        (get_cse_reg_info (i)->reg_in_table) = (get_cse_reg_info (i)->reg_tick);
      80        (get_cse_reg_info (i)->subreg_ticked) =
      81  	(rhs_regno ((((x)->u.fld[0]).rt_rtx)));
      82      }
      83    if ((((rtx_class[(int) (((x)->code))]) & (~1)) == (RTX_COMPARE & (~1))))
      84      {
      85        if (((((((x)->u.fld[0]).rt_rtx))->code) == REG))
      86  	foop ();
      87      }
      88    for (i = (rtx_length[(int) (code)]) - 1; i >= 0; i--)
      89  	arf ();
      90  }
      91  
      92  /* Make sure the constant 39 gets propagated into the PHI at the join point.  */
      93  /* { dg-final { scan-tree-dump "PHI <.*, 39" "optimized"} } */
      94