gcc/varray.h

   1 /* Virtual array support.
   2    Copyright (C) 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions.
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GCC; see the file COPYING.  If not, write to the Free
  19    the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  20    MA 02111-1307, USA.  */
  21
  22 #ifndef GCC_VARRAY_H
  23 #define GCC_VARRAY_H
  24
  25 #ifndef HOST_WIDE_INT
  26 #include "machmode.h"
  27 #endif
  28
  29 #ifndef GCC_SYSTEM_H
  30 #include "system.h"
  31 #include "coretypes.h"
  32 #include "tm.h"
  33 #endif
  34
  35 /* Auxiliary structure used inside the varray structure, used for
  36    function integration data.  */
  37
  38 struct const_equiv_data GTY(()) {
  39   /* Map pseudo reg number in calling function to equivalent constant.  We
  40      cannot in general substitute constants into parameter pseudo registers,
  41      since some machine descriptions (many RISCs) won't always handle
  42      the resulting insns.  So if an incoming parameter has a constant
  43      equivalent, we record it here, and if the resulting insn is
  44      recognizable, we go with it.
  45
  46      We also use this mechanism to convert references to incoming arguments
  47      and stacked variables.  copy_rtx_and_substitute will replace the virtual
  48      incoming argument and virtual stacked variables registers with new
  49      pseudos that contain pointers into the replacement area allocated for
  50      this inline instance.  These pseudos are then marked as being equivalent
  51      to the appropriate address and substituted if valid.  */
  52   struct rtx_def *rtx;
  53
  54   /* Record the valid age for each entry.  The entry is invalid if its
  55      age is less than const_age.  */
  56   unsigned age;
  57 };
  58
  59 /* Enum indicating what the varray contains.
  60    If this is changed, `element' in varray.c needs to be updated.  */
  61
  62 enum varray_data_enum {
  63   VARRAY_DATA_C,
  64   VARRAY_DATA_UC,
  65   VARRAY_DATA_S,
  66   VARRAY_DATA_US,
  67   VARRAY_DATA_I,
  68   VARRAY_DATA_U,
  69   VARRAY_DATA_L,
  70   VARRAY_DATA_UL,
  71   VARRAY_DATA_HINT,
  72   VARRAY_DATA_UHINT,
  73   VARRAY_DATA_GENERIC,
  74   VARRAY_DATA_CPTR,
  75   VARRAY_DATA_RTX,
  76   VARRAY_DATA_RTVEC,
  77   VARRAY_DATA_TREE,
  78   VARRAY_DATA_BITMAP,
  79   VARRAY_DATA_REG,
  80   VARRAY_DATA_CONST_EQUIV,
  81   VARRAY_DATA_BB,
  82   VARRAY_DATA_TE,
  83   NUM_VARRAY_DATA
  84 };
  85
  86 /* Union of various array types that are used.  */
  87 typedef union varray_data_tag GTY (()) {
  88   char                    GTY ((length ("%0.num_elements"),
  89                                 tag ("VARRAY_DATA_C")))         c[1];
  90   unsigned char           GTY ((length ("%0.num_elements"),
  91                                 tag ("VARRAY_DATA_UC")))        uc[1];
  92   short                   GTY ((length ("%0.num_elements"),
  93                                 tag ("VARRAY_DATA_S")))         s[1];
  94   unsigned short          GTY ((length ("%0.num_elements"),
  95                                 tag ("VARRAY_DATA_US")))        us[1];
  96   int                     GTY ((length ("%0.num_elements"),
  97                                 tag ("VARRAY_DATA_I")))         i[1];
  98   unsigned int            GTY ((length ("%0.num_elements"),
  99                                 tag ("VARRAY_DATA_U")))         u[1];
 100   long                    GTY ((length ("%0.num_elements"),
 101                                 tag ("VARRAY_DATA_L")))         l[1];
 102   unsigned long           GTY ((length ("%0.num_elements"),
 103                                 tag ("VARRAY_DATA_UL")))        ul[1];
 104   HOST_WIDE_INT           GTY ((length ("%0.num_elements"),
 105                                 tag ("VARRAY_DATA_HINT")))      hint[1];
 106   unsigned HOST_WIDE_INT  GTY ((length ("%0.num_elements"),
 107                                 tag ("VARRAY_DATA_UHINT")))     uhint[1];
 108   PTR                     GTY ((length ("%0.num_elements"), use_param (""),
 109                                 tag ("VARRAY_DATA_GENERIC")))   generic[1];
 110   char                   *GTY ((length ("%0.num_elements"),
 111                                 tag ("VARRAY_DATA_CPTR")))      cptr[1];
 112   struct rtx_def         *GTY ((length ("%0.num_elements"),
 113                                 tag ("VARRAY_DATA_RTX")))       rtx[1];
 114   struct rtvec_def       *GTY ((length ("%0.num_elements"),
 115                                 tag ("VARRAY_DATA_RTVEC")))     rtvec[1];
 116   union tree_node        *GTY ((length ("%0.num_elements"),
 117                                 tag ("VARRAY_DATA_TREE")))      tree[1];
 118   struct bitmap_head_def *GTY ((length ("%0.num_elements"),
 119                                 tag ("VARRAY_DATA_BITMAP")))    bitmap[1];
 120   struct reg_info_def    *GTY ((length ("%0.num_elements"), skip (""),
 121                                 tag ("VARRAY_DATA_REG")))       reg[1];
 122   struct const_equiv_data GTY ((length ("%0.num_elements"),
 123                         tag ("VARRAY_DATA_CONST_EQUIV")))       const_equiv[1];
 124   struct basic_block_def *GTY ((length ("%0.num_elements"), skip (""),
 125                                 tag ("VARRAY_DATA_BB")))        bb[1];
 126   struct elt_list        *GTY ((length ("%0.num_elements"),
 127                                 tag ("VARRAY_DATA_TE")))        te[1];
 128 } varray_data;
 129
 130 /* Virtual array of pointers header.  */
 131 struct varray_head_tag GTY(()) {
 132   size_t        num_elements;   /* Maximum element number allocated.  */
 133   size_t        elements_used;  /* The number of elements used, if
 134                                    using VARRAY_PUSH/VARRAY_POP.  */
 135   enum varray_data_enum type;   /* The kind of elements in the varray.  */
 136   const char   *name;           /* name of the varray for reporting errors */
 137   varray_data   GTY ((desc ("%0.type"))) data;  /* The data elements follow,
 138                                                    must be last.  */
 139 };
 140 typedef struct varray_head_tag *varray_type;
 141
 142 /* Allocate a virtual array with NUM elements, each of which is SIZE bytes
 143    long, named NAME.  Array elements are zeroed.  */
 144 extern varray_type varray_init  PARAMS ((size_t, enum varray_data_enum,
 145                                          const char *));
 146
 147 #define VARRAY_CHAR_INIT(va, num, name) \
 148   va = varray_init (num, VARRAY_DATA_C, name)
 149
 150 #define VARRAY_UCHAR_INIT(va, num, name) \
 151   va = varray_init (num, VARRAY_DATA_UC, name)
 152
 153 #define VARRAY_SHORT_INIT(va, num, name) \
 154   va = varray_init (num, VARRAY_DATA_S, name)
 155
 156 #define VARRAY_USHORT_INIT(va, num, name) \
 157   va = varray_init (num, VARRAY_DATA_US, name)
 158
 159 #define VARRAY_INT_INIT(va, num, name) \
 160   va = varray_init (num, VARRAY_DATA_I, name)
 161
 162 #define VARRAY_UINT_INIT(va, num, name) \
 163   va = varray_init (num, VARRAY_DATA_U, name)
 164
 165 #define VARRAY_LONG_INIT(va, num, name) \
 166   va = varray_init (num, VARRAY_DATA_L, name)
 167
 168 #define VARRAY_ULONG_INIT(va, num, name) \
 169   va = varray_init (num, VARRAY_DATA_UL, name)
 170
 171 #define VARRAY_WIDE_INT_INIT(va, num, name) \
 172   va = varray_init (num, VARRAY_DATA_HINT, name)
 173
 174 #define VARRAY_UWIDE_INT_INIT(va, num, name) \
 175   va = varray_init (num, VARRAY_DATA_UHINT, name)
 176
 177 #define VARRAY_GENERIC_PTR_INIT(va, num, name) \
 178   va = varray_init (num, VARRAY_DATA_GENERIC, name)
 179
 180 #define VARRAY_CHAR_PTR_INIT(va, num, name) \
 181   va = varray_init (num, VARRAY_DATA_CPTR, name)
 182
 183 #define VARRAY_RTX_INIT(va, num, name) \
 184   va = varray_init (num, VARRAY_DATA_RTX, name)
 185
 186 #define VARRAY_RTVEC_INIT(va, num, name) \
 187   va = varray_init (num, VARRAY_DATA_RTVEC, name)
 188
 189 #define VARRAY_TREE_INIT(va, num, name) \
 190   va = varray_init (num, VARRAY_DATA_TREE, name)
 191
 192 #define VARRAY_BITMAP_INIT(va, num, name) \
 193   va = varray_init (num, VARRAY_DATA_BITMAP, name)
 194
 195 #define VARRAY_REG_INIT(va, num, name) \
 196   va = varray_init (num, VARRAY_DATA_REG, name)
 197
 198 #define VARRAY_CONST_EQUIV_INIT(va, num, name) \
 199   va = varray_init (num, VARRAY_DATA_CONST_EQUIV, name)
 200
 201 #define VARRAY_BB_INIT(va, num, name) \
 202   va = varray_init (num, VARRAY_DATA_BB, name)
 203
 204 #define VARRAY_ELT_LIST_INIT(va, num, name) \
 205   va = varray_init (num, VARRAY_DATA_TE, name)
 206
 207 /* Free up memory allocated by the virtual array, but do not free any of the
 208    elements involved.  */
 209 #define VARRAY_FREE(vp) \
 210   do { if (vp) { free (vp); vp = (varray_type) 0; } } while (0)
 211
 212 /* Grow/shrink the virtual array VA to N elements.  */
 213 extern varray_type varray_grow  PARAMS ((varray_type, size_t));
 214
 215 #define VARRAY_GROW(VA, N) ((VA) = varray_grow (VA, N))
 216
 217 #define VARRAY_SIZE(VA) ((VA)->num_elements)
 218
 219 #define VARRAY_ACTIVE_SIZE(VA)  ((VA)->elements_used)
 220 #define VARRAY_POP_ALL(VA)      ((VA)->elements_used = 0)
 221
 222 #define VARRAY_CLEAR(VA) varray_clear(VA)
 223
 224 extern void varray_clear        PARAMS ((varray_type));
 225
 226 /* Check for VARRAY_xxx macros being in bound.  */
 227 #if defined ENABLE_CHECKING && (GCC_VERSION >= 2007)
 228 extern void varray_check_failed PARAMS ((varray_type, size_t,
 229                                         const char *, int,
 230                                         const char *)) ATTRIBUTE_NORETURN;
 231 #define VARRAY_CHECK(VA, N, T) __extension__                    \
 232 (*({ varray_type const _va = (VA);                              \
 233      const size_t _n = (N);                                     \
 234      if (_n >= _va->num_elements)                               \
 235        varray_check_failed (_va, _n, __FILE__, __LINE__, __FUNCTION__); \
 236      &_va->data.T[_n]; }))
 237 #else
 238 #define VARRAY_CHECK(VA, N, T) ((VA)->data.T[N])
 239 #endif
 240
 241 /* Push X onto VA.  T is the name of the field in varray_data
 242    corresponding to the type of X.  */
 243 #define VARRAY_PUSH(VA, T, X)                           \
 244   do                                                    \
 245     {                                                   \
 246       if ((VA)->elements_used >= (VA)->num_elements)    \
 247         VARRAY_GROW ((VA), 2 * (VA)->num_elements);     \
 248       (VA)->data.T[(VA)->elements_used++] = (X);        \
 249     }                                                   \
 250   while (0)
 251
 252 /* Pop the top element of VA.  */
 253 #define VARRAY_POP(VA) \
 254   ((VA)->elements_used--)
 255
 256 /* Return the top element of VA.  */
 257 #define VARRAY_TOP(VA, T) \
 258   ((VA)->data.T[(VA)->elements_used - 1])
 259
 260 #define VARRAY_CHAR(VA, N)              VARRAY_CHECK (VA, N, c)
 261 #define VARRAY_UCHAR(VA, N)             VARRAY_CHECK (VA, N, uc)
 262 #define VARRAY_SHORT(VA, N)             VARRAY_CHECK (VA, N, s)
 263 #define VARRAY_USHORT(VA, N)            VARRAY_CHECK (VA, N, us)
 264 #define VARRAY_INT(VA, N)               VARRAY_CHECK (VA, N, i)
 265 #define VARRAY_UINT(VA, N)              VARRAY_CHECK (VA, N, u)
 266 #define VARRAY_LONG(VA, N)              VARRAY_CHECK (VA, N, l)
 267 #define VARRAY_ULONG(VA, N)             VARRAY_CHECK (VA, N, ul)
 268 #define VARRAY_WIDE_INT(VA, N)          VARRAY_CHECK (VA, N, hint)
 269 #define VARRAY_UWIDE_INT(VA, N)         VARRAY_CHECK (VA, N, uhint)
 270 #define VARRAY_GENERIC_PTR(VA,N)        VARRAY_CHECK (VA, N, generic)
 271 #define VARRAY_CHAR_PTR(VA,N)           VARRAY_CHECK (VA, N, cptr)
 272 #define VARRAY_RTX(VA, N)               VARRAY_CHECK (VA, N, rtx)
 273 #define VARRAY_RTVEC(VA, N)             VARRAY_CHECK (VA, N, rtvec)
 274 #define VARRAY_TREE(VA, N)              VARRAY_CHECK (VA, N, tree)
 275 #define VARRAY_BITMAP(VA, N)            VARRAY_CHECK (VA, N, bitmap)
 276 #define VARRAY_REG(VA, N)               VARRAY_CHECK (VA, N, reg)
 277 #define VARRAY_CONST_EQUIV(VA, N)       VARRAY_CHECK (VA, N, const_equiv)
 278 #define VARRAY_BB(VA, N)                VARRAY_CHECK (VA, N, bb)
 279 #define VARRAY_ELT_LIST(VA, N)          VARRAY_CHECK (VA, N, te)
 280
 281 /* Push a new element on the end of VA, extending it if necessary.  */
 282 #define VARRAY_PUSH_CHAR(VA, X)         VARRAY_PUSH (VA, c, X)
 283 #define VARRAY_PUSH_UCHAR(VA, X)        VARRAY_PUSH (VA, uc, X)
 284 #define VARRAY_PUSH_SHORT(VA, X)        VARRAY_PUSH (VA, s, X)
 285 #define VARRAY_PUSH_USHORT(VA, X)       VARRAY_PUSH (VA, us, X)
 286 #define VARRAY_PUSH_INT(VA, X)          VARRAY_PUSH (VA, i, X)
 287 #define VARRAY_PUSH_UINT(VA, X)         VARRAY_PUSH (VA, u, X)
 288 #define VARRAY_PUSH_LONG(VA, X)         VARRAY_PUSH (VA, l, X)
 289 #define VARRAY_PUSH_ULONG(VA, X)        VARRAY_PUSH (VA, ul, X)
 290 #define VARRAY_PUSH_WIDE_INT(VA, X)     VARRAY_PUSH (VA, hint, X)
 291 #define VARRAY_PUSH_UWIDE_INT(VA, X)    VARRAY_PUSH (VA, uhint, X)
 292 #define VARRAY_PUSH_GENERIC_PTR(VA, X)  VARRAY_PUSH (VA, generic, X)
 293 #define VARRAY_PUSH_CHAR_PTR(VA, X)     VARRAY_PUSH (VA, cptr, X)
 294 #define VARRAY_PUSH_RTX(VA, X)          VARRAY_PUSH (VA, rtx, X)
 295 #define VARRAY_PUSH_RTVEC(VA, X)        VARRAY_PUSH (VA, rtvec, X)
 296 #define VARRAY_PUSH_TREE(VA, X)         VARRAY_PUSH (VA, tree, X)
 297 #define VARRAY_PUSH_BITMAP(VA, X)       VARRAY_PUSH (VA, bitmap, X)
 298 #define VARRAY_PUSH_REG(VA, X)          VARRAY_PUSH (VA, reg, X)
 299 #define VARRAY_PUSH_CONST_EQUIV(VA, X)  VARRAY_PUSH (VA, const_equiv, X)
 300 #define VARRAY_PUSH_BB(VA, X)           VARRAY_PUSH (VA, bb, X)
 301
 302 /* Return the last element of VA.  */
 303 #define VARRAY_TOP_CHAR(VA)             VARRAY_TOP (VA, c)
 304 #define VARRAY_TOP_UCHAR(VA)            VARRAY_TOP (VA, uc)
 305 #define VARRAY_TOP_SHORT(VA)            VARRAY_TOP (VA, s)
 306 #define VARRAY_TOP_USHORT(VA)           VARRAY_TOP (VA, us)
 307 #define VARRAY_TOP_INT(VA)              VARRAY_TOP (VA, i)
 308 #define VARRAY_TOP_UINT(VA)             VARRAY_TOP (VA, u)
 309 #define VARRAY_TOP_LONG(VA)             VARRAY_TOP (VA, l)
 310 #define VARRAY_TOP_ULONG(VA)            VARRAY_TOP (VA, ul)
 311 #define VARRAY_TOP_WIDE_INT(VA)         VARRAY_TOP (VA, hint)
 312 #define VARRAY_TOP_UWIDE_INT(VA)        VARRAY_TOP (VA, uhint)
 313 #define VARRAY_TOP_GENERIC_PTR(VA)      VARRAY_TOP (VA, generic)
 314 #define VARRAY_TOP_CHAR_PTR(VA)         VARRAY_TOP (VA, cptr)
 315 #define VARRAY_TOP_RTX(VA)              VARRAY_TOP (VA, rtx)
 316 #define VARRAY_TOP_RTVEC(VA)            VARRAY_TOP (VA, rtvec)
 317 #define VARRAY_TOP_TREE(VA)             VARRAY_TOP (VA, tree)
 318 #define VARRAY_TOP_BITMAP(VA)           VARRAY_TOP (VA, bitmap)
 319 #define VARRAY_TOP_REG(VA)              VARRAY_TOP (VA, reg)
 320 #define VARRAY_TOP_CONST_EQUIV(VA)      VARRAY_TOP (VA, const_equiv)
 321 #define VARRAY_TOP_BB(VA)               VARRAY_TOP (VA, bb)
 322
 323 #endif /* ! GCC_VARRAY_H */