regclass.c (renumber, [...]): New static variables, moved out of allocate_reg_info.

        * regclass.c (renumber, regno_allocated): New static variables, moved
        out of allocate_reg_info.
        (allocate_reg_info): Move these two variables outside the function.
        Move code to free memory into new function free_reg_info.
        (free_reg_info): New function, broken out of allocate_reg_info.
        * toplev.c (compile_file): Call free_reg_info, not allocate_reg_info.
        * rtl.h (allocate_reg_info): Don't declare.
        (free_reg_info): Declare.

From-SVN: r23397

gcc/ChangeLog

 Wed Oct 28 03:59:29 1998  Bernd Schmidt <crux@pool.informatik.rwth-aachen.de>
 
+	* regclass.c (renumber, regno_allocated): New static variables, moved
+	out of allocate_reg_info.
+	(allocate_reg_info): Move these two variables outside the function.
+	Move code to free memory into new function free_reg_info.
+	(free_reg_info): New function, broken out of allocate_reg_info.
+	* toplev.c (compile_file): Call free_reg_info, not allocate_reg_info.
+	* rtl.h (allocate_reg_info): Don't declare.
+	(free_reg_info): Declare.
+
 	* final.c (cleanup_subreg_operands):  ASM_INPUTs need no treatment.
 
 Wed Oct 28 02:38:12 1998  Jason Merrill  <jason@yorick.cygnus.com>

gcc/regclass.c

@@ -1827,6 +1827,9 @@ auto_inc_dec_reg_p (reg, mode)
 
 #endif /* REGISTER_CONSTRAINTS */
 
+static short *renumber = (short *)0;
+static size_t regno_allocated = 0;
+
 /* Allocate enough space to hold NUM_REGS registers for the tables used for
    reg_scan and flow_analysis that are indexed by the register number.  If
    NEW_P is non zero, initialize all of the registers, otherwise only
@@ -1840,38 +1843,12 @@ allocate_reg_info (num_regs, new_p, renumber_p)
      int new_p;
      int renumber_p;
 {
-  static size_t regno_allocated = 0;
-  static short *renumber = (short *)0;
   size_t size_info;
   size_t size_renumber;
   size_t min = (new_p) ? 0 : reg_n_max;
   struct reg_info_data *reg_data;
   struct reg_info_data *reg_next;
 
-  /* Free up all storage allocated */
-  if (num_regs < 0)
-    {
-      if (reg_n_info)
-	{
-	  VARRAY_FREE (reg_n_info);
-	  for (reg_data = reg_info_head; reg_data; reg_data = reg_next)
-	    {
-	      reg_next = reg_data->next;
-	      free ((char *)reg_data);
-	    }
-
-	  free (prefclass_buffer);
-	  free (altclass_buffer);
-	  prefclass_buffer = (char *)0;
-	  altclass_buffer = (char *)0;
-	  reg_info_head = (struct reg_info_data *)0;
-	  renumber = (short *)0;
-	}
-      regno_allocated = 0;
-      reg_n_max = 0;
-      return;
-    }
-
   if (num_regs > regno_allocated)
     {
       size_t old_allocated = regno_allocated;
@@ -1973,6 +1950,32 @@ allocate_reg_info (num_regs, new_p, renumber_p)
   MAX_REGNO_REG_SET (num_regs, new_p, renumber_p);
 }
 
+/* Free up the space allocated by allocate_reg_info.  */
+void
+free_reg_info ()
+{
+  if (reg_n_info)
+    {
+      struct reg_info_data *reg_data;
+      struct reg_info_data *reg_next;
+
+      VARRAY_FREE (reg_n_info);
+      for (reg_data = reg_info_head; reg_data; reg_data = reg_next)
+	{
+	  reg_next = reg_data->next;
+	  free ((char *)reg_data);
+	}
+
+      free (prefclass_buffer);
+      free (altclass_buffer);
+      prefclass_buffer = (char *)0;
+      altclass_buffer = (char *)0;
+      reg_info_head = (struct reg_info_data *)0;
+      renumber = (short *)0;
+    }
+  regno_allocated = 0;
+  reg_n_max = 0;
+}
 
 /* This is the `regscan' pass of the compiler, run just before cse
    and again just before loop.

gcc/rtl.h

@@ -1010,7 +1010,7 @@ extern rtx find_use_as_address		PROTO((rtx, rtx, HOST_WIDE_INT));
 extern int max_parallel;
 
 /* Free up register info memory.  */
-extern void allocate_reg_info		PROTO((size_t, int, int));
+extern void free_reg_info		PROTO((void));
 
 /* recog.c */
 extern int asm_noperands		PROTO((rtx));

gcc/toplev.c

@@ -3067,6 +3067,7 @@ compile_file (name)
   ASM_FILE_END (asm_out_file);
 #endif
 
+
   /* Language-specific end of compilation actions.  */
  finish_syntax:
   lang_finish ();
@@ -3097,6 +3098,9 @@ compile_file (name)
       && (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0))
     fatal_io_error (asm_file_name);
 
+  /* Free up memory for the benefit of leak detectors.  */
+  free_reg_info ();
+
   /* Print the times.  */
 
   if (! quiet_flag)