Initial revision

From-SVN: r42

gcc/reload.h

+/* Communication between reload.c and reload1.c.
+   Copyright (C) 1987, 1991 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+/* See reload.c and reload1.c for comments on these variables.  */
+
+/* Maximum number of reloads we can need.  */
+#define MAX_RELOADS (2 * MAX_RECOG_OPERANDS * (MAX_REGS_PER_ADDRESS + 1))
+
+extern rtx reload_in[MAX_RELOADS];
+extern rtx reload_out[MAX_RELOADS];
+extern rtx reload_in_reg[MAX_RELOADS];
+extern enum reg_class reload_reg_class[MAX_RELOADS];
+extern enum machine_mode reload_inmode[MAX_RELOADS];
+extern enum machine_mode reload_outmode[MAX_RELOADS];
+extern char reload_strict_low[MAX_RELOADS];
+extern char reload_optional[MAX_RELOADS];
+extern int reload_inc[MAX_RELOADS];
+extern int reload_needed_for_multiple[MAX_RELOADS];
+extern rtx reload_needed_for[MAX_RELOADS];
+extern int reload_secondary_reload[MAX_RELOADS];
+extern int reload_secondary_p[MAX_RELOADS];
+extern int n_reloads;
+
+extern rtx reload_reg_rtx[MAX_RELOADS];
+
+enum reload_when_needed
+{
+  RELOAD_FOR_INPUT_RELOAD_ADDRESS,
+  RELOAD_FOR_OUTPUT_RELOAD_ADDRESS,
+  RELOAD_FOR_OPERAND_ADDRESS,
+  /* The following two are not fully implemented.
+     They are used in emitting insns, but they aren't distinguished from
+     RELOAD_OTHER when computing the number of spills.  What they accomplish
+     is to avoid precluding inheritance of already loaded values
+     for input reloads when there are also output reloads.  */
+  RELOAD_FOR_INPUT,
+  RELOAD_FOR_OUTPUT,
+  RELOAD_OTHER
+};
+
+extern enum reload_when_needed reload_when_needed[MAX_RELOADS];
+
+extern rtx *reg_equiv_constant;
+extern rtx *reg_equiv_address;
+extern rtx *reg_equiv_mem;
+
+/* All the "earlyclobber" operands of the current insn
+   are recorded here.  */
+extern int n_earlyclobbers;
+extern rtx reload_earlyclobbers[MAX_RECOG_OPERANDS];
+
+/* First uid used by insns created by reload in this function.
+   Used in find_equiv_reg.  */
+extern int reload_first_uid;
+
+/* Nonzero if indirect addressing is supported when the innermost MEM is
+   of the form (MEM (SYMBOL_REF sym)).  It is assumed that the level to
+   which these are valid is the same as spill_indirect_levels, above.   */
+
+extern char indirect_symref_ok;
+
+/* Nonzero if an address (plus (reg frame_pointer) (reg ...)) is valid.  */
+extern char double_reg_address_ok;
+
+void init_reload ();
+void find_reloads ();
+void subst_reloads ();
+rtx eliminate_regs ();