gcc/varray.h

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