[PATCH] [COMMITTED 3.4/3.5] Maybe Fix Java Bootstrap on powerpc

[Andrew Pinski]

I did not expect NULLs in the field's chain, I had only built with C, 
C++, Objc, and f77.
This patch fixes that by checking for NULL and making sure that it does 
not seg fault.
Committed to the mainline and 3.4 branch as obvious.


ChangeLog:

	* config/rs6000/rs6000.c (rs6000_special_round_type_align):
	Check for NULL in the chain and remove repeated code.


Patch:
Index: rs6000.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/rs6000/rs6000.c,v
retrieving revision 1.579
diff -u -p -r1.579 rs6000.c
--- rs6000.c	18 Jan 2004 03:46:55 -0000	1.579
+++ rs6000.c	18 Jan 2004 15:42:56 -0000
@@ -2325,15 +2325,13 @@ unsigned int
  rs6000_special_round_type_align (tree type, int computed, int 
specified)
  {
    tree field = TYPE_FIELDS (type);
-  if (!field)
-    return MAX (computed, specified);

    /* Skip all the static variables only if ABI is greater than
       1 or equal to 0.   */
-  while (TREE_CODE (field) == VAR_DECL)
+  while (field != NULL && TREE_CODE (field) == VAR_DECL)
      field = TREE_CHAIN (field);

-  if (field == type || DECL_MODE (field) != DFmode)
+  if (field == NULL || field == type || DECL_MODE (field) != DFmode)
      return MAX (computed, specified);

    return MAX (MAX (computed, specified), 64);