Add missing declarations for external functions in reload.c, reload1.c,

and caller-save.c.
(reload_strict_low, reload_needed_for_multiple, reload_needed_for): Deleted.
(reload_opnum): New array.
(enum reload_type): Renamed from reload_when_needed and expanded to include
more reload types.
(reload_n_operands): New variable.

From-SVN: r3912

1 files changed, 144 insertions, 21 deletions

diff --git a/gcc/reload.h b/gcc/reload.h
index 4aaec8b..4369d23 100644
--- a/gcc/reload.h
+++ b/gcc/reload.h
@@ -1,5 +1,5 @@
 /* Communication between reload.c and reload1.c.
-   Copyright (C) 1987, 1991 Free Software Foundation, Inc.
+   Copyright (C) 1987, 1991, 1992, 1993 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -27,6 +27,14 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #endif
 #endif
 
+#ifndef STDIO_PROTO
+#ifdef BUFSIZ
+#define STDIO_PROTO(ARGS) PROTO(ARGS)
+#else
+#define STDIO_PROTO(ARGS) ()
+#endif
+#endif
+
 /* If secondary reloads are the same for inputs and outputs, define those
    macros here.  */
 
@@ -53,11 +61,9 @@ 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_opnum[MAX_RELOADS];
 extern int reload_secondary_reload[MAX_RELOADS];
 extern int reload_secondary_p[MAX_RELOADS];
 #ifdef MAX_INSN_CODE
@@ -67,22 +73,34 @@ extern int n_reloads;
 
 extern rtx reload_reg_rtx[MAX_RELOADS];
 
-enum reload_when_needed
+/* Encode the usage of a reload.  The following codes are supported:
+
+   RELOAD_FOR_INPUT		reload of an input operand
+   RELOAD_FOR_OUTPUT		likewise, for output
+   RELOAD_FOR_INSN		a reload that must not conflict with anything
+				used in the insn, but may conflict with
+				something used before or after the insn
+   RELOAD_FOR_INPUT_ADDRESS	reload for parts of the address of an object
+				that is an input reload
+   RELOAD_FOR_OUTPUT_ADDRESS	likewise, for output reload
+   RELOAD_FOR_OPERAND_ADDRESS	reload for the address of a non-reloaded
+				operand; these don't conflict with
+				any other addresses.
+   RELOAD_OTHER			none of the above, usually multiple uses
+   RELOAD_FOR_OTHER_ADDRESS     reload for part of the address of an input
+   				that is marked RELOAD_OTHER.
+
+   This used to be "enum reload_when_needed" but some debuggers have trouble
+   with an enum tag and variable of the same name.  */
+
+enum reload_type
 {
-  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
+  RELOAD_FOR_INPUT, RELOAD_FOR_OUTPUT, RELOAD_FOR_INSN, 
+  RELOAD_FOR_INPUT_ADDRESS, RELOAD_FOR_OUTPUT_ADDRESS,
+  RELOAD_FOR_OPERAND_ADDRESS, RELOAD_OTHER, RELOAD_FOR_OTHER_ADDRESS
 };
 
-extern enum reload_when_needed reload_when_needed[MAX_RELOADS];
+extern enum reload_type reload_when_needed[MAX_RELOADS];
 
 extern rtx *reg_equiv_constant;
 extern rtx *reg_equiv_memory_loc;
@@ -94,6 +112,9 @@ extern rtx *reg_equiv_mem;
 extern int n_earlyclobbers;
 extern rtx reload_earlyclobbers[MAX_RECOG_OPERANDS];
 
+/* Save the number of operands.  */
+extern int reload_n_operands;
+
 /* First uid used by insns created by reload in this function.
    Used in find_equiv_reg.  */
 extern int reload_first_uid;
@@ -115,10 +136,112 @@ extern enum insn_code reload_in_optab[];
 extern enum insn_code reload_out_optab[];
 #endif
 
-extern void init_reload PROTO((void));
+/* Functions from reload.c:  */
+
+/* Return a memory location that will be used to copy X in mode MODE.  
+   If we haven't already made a location for this mode in this insn,
+   call find_reloads_address on the location being returned.  */
+extern rtx get_secondary_mem PROTO((rtx, enum machine_mode,
+				    int, enum reload_type));
+
+/* Clear any secondary memory locations we've made.  */
+extern void clear_secondary_mem PROTO((void));
+
+/* Transfer all replacements that used to be in reload FROM to be in
+   reload TO.  */
+extern void transfer_replacements PROTO((int, int));
+
+/* Return 1 if ADDR is a valid memory address for mode MODE,
+   and check that each pseudo reg has the proper kind of
+   hard reg.  */
+extern int strict_memory_address_p PROTO((enum machine_mode, rtx));
+
+/* Like rtx_equal_p except that it allows a REG and a SUBREG to match
+   if they are the same hard reg, and has special hacks for
+   autoincrement and autodecrement.  */
+extern int operands_match_p PROTO((rtx, rtx));
+
+/* Return the number of times character C occurs in string S.  */
+extern int n_occurrences PROTO((int, char *));
+
+/* Return 1 if altering OP will not modify the value of CLOBBER. */
+extern int safe_from_earlyclobber PROTO((rtx, rtx));
+
+/* Search the body of INSN for values that need reloading and record them
+   with push_reload.  REPLACE nonzero means record also where the values occur
+   so that subst_reloads can be used.
 extern void find_reloads PROTO((rtx, int, int, int, short *));
+
+/* Compute the sum of X and Y, making canonicalizations assumed in an
+   address, namely: sum constant integers, surround the sum of two
+   constants with a CONST, put the constant as the second operand, and
+   group the constant on the outermost sum.  */
+extern rtx form_sum PROTO((rtx, rtx));
+
+/* Substitute into the current INSN the registers into which we have reloaded
+   the things that need reloading.  */
 extern void subst_reloads PROTO((void));
-extern rtx get_secondary_mem PROTO((rtx, enum machine_mode));
-extern rtx eliminate_regs PROTO((rtx, enum machine_mode, rtx));
-extern rtx gen_input_reload PROTO((rtx, rtx, rtx));
+
+/* Make a copy of any replacements being done into X and move those copies
+   to locations in Y, a copy of X.  We only look at the highest level of
+   the RTL.  */
+extern void copy_replacements PROTO((rtx, rtx));
+
+/* If LOC was scheduled to be replaced by something, return the replacement.
+   Otherwise, return *LOC.  */
 extern rtx find_replacement PROTO((rtx *));
+
+/* Return nonzero if register in range [REGNO, ENDREGNO)
+   appears either explicitly or implicitly in X
+   other than being stored into.  */
+extern int refers_to_regno_for_reload_p PROTO((int, int, rtx, rtx *));
+
+/* Nonzero if modifying X will affect IN.  */
+extern int reg_overlap_mentioned_for_reload_p PROTO((rtx, rtx));
+
+/* Return nonzero if anything in X contains a MEM.  Look also for pseudo
+   registers.  */
+extern int refers_to_mem_for_reload_p PROTO((rtx));
+
+/* Check the insns before INSN to see if there is a suitable register
+   containing the same value as GOAL.  */
+extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *,
+				 int, enum machine_mode));
+
+/* Return 1 if register REGNO is the subject of a clobber in insn INSN.  */
+extern int regno_clobbered_p PROTO((int, rtx));
+
+
+/* Functions in reload1.c:  */
+
+/* Initialize the reload pass once per compilation.  */
+extern void init_reload PROTO((void));
+
+/* The reload pass itself.  */
+extern int reload STDIO_PROTO((rtx, int, FILE *));
+
+/* Mark the slots in regs_ever_live for the hard regs
+   used by pseudo-reg number REGNO.  */
+extern void mark_home_live PROTO((int));
+
+/* Scan X and replace any eliminable registers (such as fp) with a
+   replacement (such as sp), plus an offset.  */
+extern rtx eliminate_regs PROTO((rtx, enum machine_mode, rtx));
+
+/* Emit code to perform an input reload of IN to RELOADREG.  IN is from
+   operand OPNUM with reload type TYPE.   */
+extern rtx gen_input_reload PROTO((rtx, rtx, int, enum reload_type));
+
+/* Functions in caller-save.c:  */
+
+/* Initialize for caller-save.  */
+extern void init_caller_save PROTO((void));
+
+/* Initialize save areas by showing that we haven't allocated any yet.  */
+extern void init_save_areas PROTO((void));
+
+/* Allocate save areas for any hard registers that might need saving.  */
+extern int setup_save_areas PROTO((int *));
+
+/* Find the places where hard regs are live across calls and save them.  */
+extern void save_call_clobbered_regs PROTO((enum machine_mode));