calls.c (store_unaligned_arguments_into_pseudos): Use xmalloc to allocate memory…

calls.c (store_unaligned_arguments_into_pseudos): Use xmalloc to allocate memory that will live beyond this function.

        * calls.c (store_unaligned_arguments_into_pseudos): Use xmalloc to
        allocate memory that will live beyond this function.
        (expand_call): Free it here.

From-SVN: r24561

gcc/ChangeLog

+Thu Jan  7 11:26:17 1999  Mark Mitchell  <mark@markmitchell.com>
+
+	* calls.c (store_unaligned_arguments_into_pseudos): Use xmalloc to
+	allocate memory that will live beyond this function.
+	(expand_call): Free it here.
+
 Thu Jan  7 03:08:17 1999  Richard Henderson  <rth@cygnus.com>
 
 	* sparc.h (PREFERRED_RELOAD_CLASS): Select GENERAL_REGS for 

gcc/calls.c

@@ -753,7 +753,12 @@ restore_fixed_argument_area (save_area, argblock, high_to_save, low_to_save)
 /* If any elements in ARGS refer to parameters that are to be passed in
    registers, but not in memory, and whose alignment does not permit a
    direct copy into registers.  Copy the values into a group of pseudos
-   which we will later copy into the appropriate hard registers.  */
+   which we will later copy into the appropriate hard registers. 
+
+   Pseudos for each unaligned argument will be stored into the array
+   args[argnum].aligned_regs.  The caller is responsible for deallocating
+   the aligned_regs array if it is nonzero.  */
+
 static void
 store_unaligned_arguments_into_pseudos (args, num_actuals)
      struct arg_data *args;
@@ -774,8 +779,8 @@ store_unaligned_arguments_into_pseudos (args, num_actuals)
 	  = args[i].partial ? args[i].partial
 	    : (bytes + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD;
 
-	args[i].aligned_regs = (rtx *) alloca (sizeof (rtx)
-					       * args[i].n_aligned_regs);
+	args[i].aligned_regs = (rtx *) xmalloc (sizeof (rtx)
+						* args[i].n_aligned_regs);
 
 	/* Structures smaller than a word are aligned to the least
 	   significant byte (to the right).  On a BYTES_BIG_ENDIAN machine,
@@ -2298,6 +2303,11 @@ expand_call (exp, target, ignore)
 
   pop_temp_slots ();
 
+  /* Free up storage we no longer need.  */
+  for (i = 0; i < num_actuals; ++i)
+    if (args[i].aligned_regs)
+      free (args[i].aligned_regs);
+
   return target;
 }