Warning fixes:

        * loop.c (insert_bct): Hide the definition of variables
        `increment_direction', `compare_direction', `add_iteration' and
        `loop_var_mode'.
        * recog.c (mode_dependent_address_p): Mark parameter `addr' with
        ATTRIBUTE_UNUSED.  Mark label `win' with ATTRIBUTE_UNUSED_LABEL.
        (mode_independent_operand): Mark label `lose' with
        ATTRIBUTE_UNUSED_LABEL.
        * regclass.c (n_occurrences): Remove prototype and definition.
        * reload.c (find_reloads_address_1): Mark variable `tem' with
        ATTRIBUTE_UNUSED.
        * reload1.c (reload): Cast the first two arguments of `bcopy' to PTR.
        * sbitmap.c (sbitmap_copy): Likewise.
        * scan-decls.c (scan_decls): Hide label `handle_comma'.
        * toplev.c (output_lang_identify): Mark prototype with
        ATTRIBUTE_UNUSED.
        * tree.c (make_node): Cast the first argument of `bzero' to PTR.
        (make_tree_vec): Likewise.
        (build1): Likewise.
        * varasm.c (assemble_static_space): Mark variable `tem' with
        ATTRIBUTE_UNUSED.

From-SVN: r24740

gcc/ChangeLog

+Mon Jan 18 09:05:37 1999  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* loop.c (insert_bct): Hide the definition of variables
+	`increment_direction', `compare_direction', `add_iteration' and
+	`loop_var_mode'.
+
+	* recog.c (mode_dependent_address_p): Mark parameter `addr' with
+	ATTRIBUTE_UNUSED.  Mark label `win' with ATTRIBUTE_UNUSED_LABEL.
+	(mode_independent_operand): Mark label `lose' with
+	ATTRIBUTE_UNUSED_LABEL.
+
+	* regclass.c (n_occurrences): Remove prototype and definition.
+
+	* reload.c (find_reloads_address_1): Mark variable `tem' with
+	ATTRIBUTE_UNUSED.
+
+	* reload1.c (reload): Cast the first two arguments of `bcopy' to PTR.
+
+	* sbitmap.c (sbitmap_copy): Likewise.
+
+	* scan-decls.c (scan_decls): Hide label `handle_comma'.
+
+	* toplev.c (output_lang_identify): Mark prototype with
+	ATTRIBUTE_UNUSED.
+
+	* tree.c (make_node): Cast the first argument of `bzero' to PTR.
+	(make_tree_vec): Likewise.
+	(build1): Likewise.
+
+	* varasm.c (assemble_static_space): Mark variable `tem' with
+ 	ATTRIBUTE_UNUSED.
+
 Mon Jan 18 04:28:36 1999  Nathan Sidwell  <nathan@acm.org>
 
 	* Makefile.in (GCOV_INSTALL_NAME): New macro.

gcc/loop.c

@@ -7944,6 +7944,7 @@ insert_bct (loop_start, loop_end, loop_info)
   int i;
   unsigned HOST_WIDE_INT n_iterations;
 
+#if 0
   int increment_direction, compare_direction;
 
   /* If the loop condition is <= or >=, the number of iteration
@@ -7951,6 +7952,7 @@ insert_bct (loop_start, loop_end, loop_info)
   int add_iteration = 0;
 
   enum machine_mode loop_var_mode = word_mode;
+#endif
 
   int loop_num = uid_loop_num [INSN_UID (loop_start)];
 

gcc/recog.c

@@ -1861,11 +1861,12 @@ offsettable_address_p (strictp, mode, y)
 
 int
 mode_dependent_address_p (addr)
-     rtx addr;
+  rtx addr ATTRIBUTE_UNUSED; /* Maybe used in GO_IF_MODE_DEPENDENT_ADDRESS. */
 {
   GO_IF_MODE_DEPENDENT_ADDRESS (addr, win);
   return 0;
- win:
+  /* Label `win' might (not) be used via GO_IF_MODE_DEPENDENT_ADDRESS. */
+ win: ATTRIBUTE_UNUSED_LABEL
   return 1;
 }
 
@@ -1888,7 +1889,8 @@ mode_independent_operand (op, mode)
   addr = XEXP (op, 0);
   GO_IF_MODE_DEPENDENT_ADDRESS (addr, lose);
   return 1;
- lose:
+  /* Label `lose' might (not) be used via GO_IF_MODE_DEPENDENT_ADDRESS. */
+ lose: ATTRIBUTE_UNUSED_LABEL
   return 0;
 }
 

gcc/regclass.c

@@ -691,7 +691,6 @@ static int loop_depth;
 
 static int loop_cost;
 
-static int n_occurrences	PROTO((int, char *));
 static rtx scan_one_insn	PROTO((rtx, int));
 static void record_reg_classes	PROTO((int, int, rtx *, enum machine_mode *,
 				       char **, rtx));
@@ -742,18 +741,6 @@ regclass_init ()
   prefclass = 0;
 }
 
-/* Return the number of times character C occurs in string S.  */
-static int
-n_occurrences (c, s)
-     int c;
-     char *s;
-{
-  int n = 0;
-  while (*s)
-    n += (*s++ == c);
-  return n;
-}
-
 /* Subroutine of regclass, processes one insn INSN.  Scan it and record each
    time it would save code to put a certain register in a certain class.
    PASS, when nonzero, inhibits some optimizations which need only be done

gcc/reload.c

 /* Search an insn for pseudo regs that must be in hard regs and are not.
-   Copyright (C) 1987, 88, 89, 92-97, 1998 Free Software Foundation, Inc.
+   Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -5318,7 +5318,8 @@ find_reloads_address_1 (mode, x, context, loc, opnum, type, ind_levels, insn)
 	     of an equivalent address for a pseudo that was not allocated to a
 	     hard register.  Verify that the specified address is valid and
 	     reload it into a register.  */
-	  rtx tem = XEXP (x, 0);
+	  /* Variable `tem' might or might not be used in FIND_REG_INC_NOTE. */
+	  rtx tem ATTRIBUTE_UNUSED = XEXP (x, 0);
 	  register rtx link;
 	  int reloadnum;
 

gcc/reload1.c

@@ -662,7 +662,7 @@ reload (first, global, dumpfile)
   reg_max_ref_width = (int *) xmalloc (max_regno * sizeof (int));
   bzero ((char *) reg_max_ref_width, max_regno * sizeof (int));
   reg_old_renumber = (short *) xmalloc (max_regno * sizeof (short));
-  bcopy (reg_renumber, reg_old_renumber, max_regno * sizeof (short));
+  bcopy ((PTR) reg_renumber, (PTR) reg_old_renumber, max_regno * sizeof (short));
   pseudo_forbidden_regs
     = (HARD_REG_SET *) xmalloc (max_regno * sizeof (HARD_REG_SET));
   pseudo_previous_regs

gcc/sbitmap.c

@@ -96,7 +96,8 @@ void
 sbitmap_copy (dst, src)
      sbitmap dst, src;
 {
-  bcopy (src->elms, dst->elms, sizeof (SBITMAP_ELT_TYPE) * dst->size);
+  bcopy ((PTR) src->elms, (PTR) dst->elms,
+	 sizeof (SBITMAP_ELT_TYPE) * dst->size);
 }
 
 /* Zero all elements in a bitmap.  */

gcc/scan-decls.c

 /* scan-decls.c - Extracts declarations from cpp output.
-   Copyright (C) 1993, 1995, 1997, 1998 Free Software Foundation, Inc.
+   Copyright (C) 1993, 1995, 97-98, 1999 Free Software Foundation, Inc.
 
 This program is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by the
@@ -189,7 +189,9 @@ scan_decls (pfile, argc, argv)
 	maybe_handle_comma:
 	  if (token != CPP_COMMA)
 	    goto new_statement;
+#if 0
 	handle_comma:
+#endif
 	  /* Handle multiple declarators in a single declaration,
 	     as in:  extern char *strcpy (), *strcat (), ... ; */
 	  if (declarator_start == 0)

gcc/toplev.c

@@ -197,7 +197,8 @@ static void v_really_sorry PROTO((char *, va_list)) ATTRIBUTE_NORETURN;
 static void float_signal PROTO((int)) ATTRIBUTE_NORETURN;
 static void pipe_closed PROTO((int)) ATTRIBUTE_NORETURN;
 #ifdef ASM_IDENTIFY_LANGUAGE
-static void output_lang_identify PROTO((FILE *));
+/* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
+static void output_lang_identify PROTO((FILE *)) ATTRIBUTE_UNUSED;
 #endif
 static void open_dump_file PROTO((char *, char *));
 static void close_dump_file PROTO((void (*) (FILE *, rtx), rtx));

gcc/tree.c

@@ -1070,7 +1070,7 @@ make_node (code)
     }
 
   t = (tree) obstack_alloc (obstack, length);
-  bzero (t, length);
+  bzero ((PTR) t, length);
 
 #ifdef GATHER_STATISTICS
   tree_node_counts[(int)kind]++;
@@ -1551,7 +1551,7 @@ make_tree_vec (len)
 #endif
 
   t = (tree) obstack_alloc (obstack, length);
-  bzero (t, length);
+  bzero ((PTR) t, length);
 
   TREE_SET_CODE (t, TREE_VEC);
   TREE_VEC_LENGTH (t) = len;
@@ -3058,7 +3058,7 @@ build1 (code, type, node)
   length = sizeof (struct tree_exp);
 
   t = (tree) obstack_alloc (obstack, length);
-  bzero (t, length);
+  bzero ((PTR) t, length);
 
 #ifdef GATHER_STATISTICS
   tree_node_counts[(int)kind]++;

gcc/varasm.c

 /* Output variables, constants and external declarations, for GNU compiler.
-   Copyright (C) 1987, 88, 89, 92-97, 1998 Free Software Foundation, Inc.
+   Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -1711,7 +1711,9 @@ assemble_static_space (size)
   {
     /* Round size up to multiple of BIGGEST_ALIGNMENT bits
        so that each uninitialized object starts on such a boundary.  */
-    int rounded = ((size + (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1)
+    /* Variable `rounded' might or might not be used in ASM_OUTPUT_LOCAL. */
+    int rounded ATTRIBUTE_UNUSED
+      = ((size + (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1)
 	 / (BIGGEST_ALIGNMENT / BITS_PER_UNIT)
 	 * (BIGGEST_ALIGNMENT / BITS_PER_UNIT));
     ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded);