gcc/testsuite/c-c++-common/pr44832.c

   1 /* PR debug/44832 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fcompare-debug" } */
   4 /* { dg-options "-O2 -fcompare-debug -fno-short-enums" {target short_enums} } */
   5
   6 struct rtx_def;
   7 typedef struct rtx_def *rtx;
   8 typedef const struct rtx_def *const_rtx;
   9 struct rtvec_def;
  10 typedef struct rtvec_def *rtvec;
  11 extern int ix86_isa_flags;
  12
  13 enum machine_mode
  14 {
  15   VOIDmode,
  16   V8HImode,
  17   V16QImode,
  18   V4SImode,
  19   V2DImode,
  20   V32QImode,
  21   MAX_MACHINE_MODE,
  22
  23   NUM_MACHINE_MODES = MAX_MACHINE_MODE
  24 };
  25 extern unsigned char mode_size[NUM_MACHINE_MODES];
  26 extern const unsigned char mode_inner[NUM_MACHINE_MODES];
  27 extern const unsigned char mode_nunits[NUM_MACHINE_MODES];
  28 enum rtx_code {
  29
  30 CONST_INT ,
  31
  32 CONST_FIXED ,
  33
  34 CONST_DOUBLE
  35
  36   };
  37 union rtunion_def
  38 {
  39   rtvec rt_rtvec;
  40 };
  41 typedef union rtunion_def rtunion;
  42 struct rtx_def {
  43
  44   __extension__ enum rtx_code code: 16;
  45
  46   __extension__ enum machine_mode mode : 8;
  47
  48   union u {
  49     rtunion fld[1];
  50   } u;
  51 };
  52 struct rtvec_def {
  53   rtx elem[1];
  54 };
  55 extern int rtx_equal_p (const_rtx, const_rtx);
  56 extern rtx gen_reg_rtx (enum machine_mode);
  57
  58 extern void
  59 ix86_expand_vector_init_concat (enum machine_mode mode,
  60                                 rtx target, rtx *ops, int n);
  61
  62 static void
  63 ix86_expand_vector_init_general (unsigned char mmx_ok, enum machine_mode mode,
  64      rtx target, rtx vals)
  65 {
  66   rtx ops[32], op0, op1;
  67   enum machine_mode half_mode = VOIDmode;
  68   int n, i;
  69
  70   switch (mode)
  71     {
  72     case V4SImode:
  73     case V2DImode:
  74       n = mode_nunits[mode];
  75       ix86_expand_vector_init_concat (mode, target, ops, n);
  76       return;
  77
  78     case V32QImode:
  79       goto half;
  80 half:
  81 {
  82   typedef int eger;
  83   if (mode != V4SImode)
  84  ops[0] = 0;
  85 }
  86       n = mode_nunits[mode];
  87       for (i = 0; i < n; i++)
  88  ops[i] = (((((vals)->u.fld[0]).rt_rtvec))->elem[i]);
  89       op0 = gen_reg_rtx (VOIDmode);
  90       return;
  91
  92     case V16QImode:
  93       if (!((ix86_isa_flags & (1 << 19)) != 0))
  94  break;
  95
  96     case V8HImode:
  97       if (!((ix86_isa_flags & (1 << 17)) != 0))
  98  break;
  99
 100       n = mode_nunits[mode];
 101       for (i = 0; i < n; i++)
 102  ops[i] = (((((vals)->u.fld[0]).rt_rtvec))->elem[i]);
 103       return;
 104
 105     default:
 106       ;
 107     }
 108
 109     {
 110       int n_words;
 111
 112       n_words = ((unsigned short) mode_size[mode]) / 4;
 113
 114       if (n_words == 4)
 115    ix86_expand_vector_init_general (0, V4SImode, 0, 0);
 116     }
 117 }
 118
 119
 120 void
 121 ix86_expand_vector_init (unsigned char mmx_ok, rtx target, rtx vals)
 122 {
 123   enum machine_mode mode = ((enum machine_mode) (target)->mode);
 124   enum machine_mode inner_mode = ((enum machine_mode) mode_inner[mode]);
 125   int n_elts = mode_nunits[mode];
 126   int n_var = 0, one_var = -1;
 127   unsigned char all_same = 1, all_const_zero = 1;
 128   int i;
 129   rtx x;
 130
 131   for (i = 0; i < n_elts; ++i)
 132     {
 133       x = (((((vals)->u.fld[0]).rt_rtvec))->elem[i]);
 134       if (!((((enum rtx_code) (x)->code) == CONST_INT)
 135      || ((enum rtx_code) (x)->code) == CONST_DOUBLE
 136      || ((enum rtx_code) (x)->code) == CONST_FIXED))
 137  n_var++, one_var = i;
 138       else
 139  all_const_zero = 0;
 140       if (i > 0 && !rtx_equal_p (x, (((((vals)->u.fld[0]).rt_rtvec))->elem[0])))
 141  all_same = 0;
 142     }
 143
 144
 145   if (n_var == 0)
 146     {
 147       return;
 148     }
 149
 150   if (all_same)
 151     return;
 152
 153   if (n_var == 1)
 154     {
 155       if (all_const_zero)
 156  return;
 157
 158     }
 159
 160   ix86_expand_vector_init_general (mmx_ok, mode, target, vals);
 161 }