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- /* Define control and data flow tables, and regsets.
- Copyright (C) 1987 Free Software Foundation, Inc.
-
- This file is part of GNU CC.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY. No author or distributor
- accepts responsibility to anyone for the consequences of using it
- or for whether it serves any particular purpose or works at all,
- unless he says so in writing. Refer to the GNU CC General Public
- License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- GNU CC, but only under the conditions described in the
- GNU CC General Public License. A copy of this license is
- supposed to have been given to you along with GNU CC so you
- can know your rights and responsibilities. It should be in a
- file named COPYING. Among other things, the copyright notice
- and this notice must be preserved on all copies. */
-
-
- /* Define the type for a pointer to a set with a bit for each
- (hard or pseudo) register. */
-
- typedef long *regset;
-
- /* Size of a regset for the current function,
- in (1) bytes and (2) elements. */
-
- extern int regset_bytes;
- extern int regset_size;
-
- /* Number of bits in each actual element of a regset. */
-
- #define REGSET_ELT_BITS HOST_BITS_PER_INT
-
- /* Number of basic blocks in the current function. */
-
- extern int n_basic_blocks;
-
- /* Index by basic block number, get first insn in the block. */
-
- extern rtx *basic_block_head;
-
- /* Index by basic block number, get last insn in the block. */
-
- extern rtx *basic_block_end;
-
- /* Index by basic block number, get address of regset
- describing the registers live at the start of that block. */
-
- extern regset *basic_block_live_at_start;
-
- /* Indexed by n, gives number of basic block that (REG n) is used in.
- Or gives -2 if (REG n) is used in more than one basic block.
- Or -1 if it has not yet been seen so no basic block is known. */
-
- extern short *reg_basic_block;
-