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View File pr14348.patch of Package gcc33 (Project openSUSE:Factory)

2004-03-02  Gabriel Dos Reis  <gdr@integrable-solutions.net>

	PR bootstrap/14348
	Backport
	2003-10-22  Joseph S. Myers  <jsm@polyomino.org.uk>
	* obstack.h: Merge the following change from gnulib:
	2003-10-21  Paul Eggert  <eggert@twinsun.com>
	* obstack.h (obstack_1grow_fast): Properly parenthesize arg.
	(obstack_ptr_grow_fast, obstack_int_grow_fast):
	Don't use lvalue casts, as GCC plans to remove support for them
	in GCC 3.5.  Reported by Joseph S. Myers.  This bug
	was also present in the non-GCC version, indicating that this
	code had always been buggy and had never been widely used.
	(obstack_1grow, obstack_ptr_grow, obstack_int_grow,
	obstack_blank):
	Use the fast variant of each macro, rather than copying the
	definiens of the fast variant; that way, we'll be more likely to
	catch future bugs in the fast variants.

2004-03-02  Gabriel Dos Reis  <gdr@integrable-solutions.net>

	PR bootstrap/14348
	Backport
	2003-10-20  Joseph S. Myers  <jsm@polyomino.org.uk>
	* objc/hash.h (hash_string): Don't use a cast as an lvalue.


===================================================================
RCS file: /cvs/gcc/gcc/include/obstack.h,v
retrieving revision 1.5
retrieving revision 1.5.50.1
diff -u -r1.5 -r1.5.50.1
--- gcc/include/obstack.h	2001/03/14 19:44:38	1.5
+++ gcc/include/obstack.h	2004/03/02 02:18:16	1.5.50.1
@@ -343,7 +343,7 @@
 
 #endif
 
-#define obstack_1grow_fast(h,achar) (*((h)->next_free)++ = achar)
+#define obstack_1grow_fast(h,achar) (*((h)->next_free)++ = (achar))
 
 #define obstack_blank_fast(h,n) ((h)->next_free += (n))
 
@@ -411,7 +411,7 @@
 ({ struct obstack *__o = (OBSTACK);					\
    if (__o->next_free + 1 > __o->chunk_limit)				\
      _obstack_newchunk (__o, 1);					\
-   *(__o->next_free)++ = (datum);					\
+   obstack_1grow_fast (__o, datum);					\
    (void) 0; })
 
 /* These assume that the obstack alignment is good enough for pointers or ints,
@@ -423,19 +423,28 @@
 ({ struct obstack *__o = (OBSTACK);					\
    if (__o->next_free + sizeof (void *) > __o->chunk_limit)		\
      _obstack_newchunk (__o, sizeof (void *));				\
-   *((void **)__o->next_free)++ = ((void *)datum);			\
-   (void) 0; })
+   obstack_ptr_grow_fast (__o, datum); })
 
 # define obstack_int_grow(OBSTACK,datum)				\
 __extension__								\
 ({ struct obstack *__o = (OBSTACK);					\
    if (__o->next_free + sizeof (int) > __o->chunk_limit)		\
      _obstack_newchunk (__o, sizeof (int));				\
-   *((int *)__o->next_free)++ = ((int)datum);				\
+   obstack_int_grow_fast (__o, datum); })
+
+# define obstack_ptr_grow_fast(OBSTACK,aptr)				\
+__extension__								\
+({ struct obstack *__o1 = (OBSTACK);					\
+   *(const void **) __o1->next_free = (aptr);				\
+   __o1->next_free += sizeof (const void *);				\
    (void) 0; })
 
-# define obstack_ptr_grow_fast(h,aptr) (*((void **) (h)->next_free)++ = (void *)aptr)
-# define obstack_int_grow_fast(h,aint) (*((int *) (h)->next_free)++ = (int) aint)
+# define obstack_int_grow_fast(OBSTACK,aint)				\
+__extension__								\
+({ struct obstack *__o1 = (OBSTACK);					\
+   *(int *) __o1->next_free = (aint);					\
+   __o1->next_free += sizeof (int);					\
+   (void) 0; })
 
 # define obstack_blank(OBSTACK,length)					\
 __extension__								\
@@ -443,7 +452,7 @@
    int __len = (length);						\
    if (__o->chunk_limit - __o->next_free < __len)			\
      _obstack_newchunk (__o, __len);					\
-   __o->next_free += __len;						\
+   obstack_blank_fast (__o, __len);					\
    (void) 0; })
 
 # define obstack_alloc(OBSTACK,length)					\
@@ -530,26 +539,29 @@
 # define obstack_1grow(h,datum)						\
 ( (((h)->next_free + 1 > (h)->chunk_limit)				\
    ? (_obstack_newchunk ((h), 1), 0) : 0),				\
-  (*((h)->next_free)++ = (datum)))
+  obstack_1grow_fast (h, datum))
 
 # define obstack_ptr_grow(h,datum)					\
 ( (((h)->next_free + sizeof (char *) > (h)->chunk_limit)		\
    ? (_obstack_newchunk ((h), sizeof (char *)), 0) : 0),		\
-  (*((char **) (((h)->next_free+=sizeof(char *))-sizeof(char *))) = ((char *) datum)))
+  obstack_ptr_grow_fast (h, datum))
 
 # define obstack_int_grow(h,datum)					\
 ( (((h)->next_free + sizeof (int) > (h)->chunk_limit)			\
    ? (_obstack_newchunk ((h), sizeof (int)), 0) : 0),			\
-  (*((int *) (((h)->next_free+=sizeof(int))-sizeof(int))) = ((int) datum)))
+  obstack_int_grow_fast (h, datum))
+
+# define obstack_ptr_grow_fast(h,aptr)					\
+  (((const void **) ((h)->next_free += sizeof (void *)))[-1] = (aptr))
 
-# define obstack_ptr_grow_fast(h,aptr) (*((char **) (h)->next_free)++ = (char *) aptr)
-# define obstack_int_grow_fast(h,aint) (*((int *) (h)->next_free)++ = (int) aint)
+# define obstack_int_grow_fast(h,aint)					\
+  (((int *) ((h)->next_free += sizeof (int)))[-1] = (aptr))
 
 # define obstack_blank(h,length)					\
 ( (h)->temp = (length),							\
   (((h)->chunk_limit - (h)->next_free < (h)->temp)			\
    ? (_obstack_newchunk ((h), (h)->temp), 0) : 0),			\
-  ((h)->next_free += (h)->temp))
+  obstack_blank_fast (h, (h)->temp))
 
 # define obstack_alloc(h,length)					\
  (obstack_blank ((h), (length)), obstack_finish ((h)))
===================================================================
RCS file: /cvs/gcc/gcc/libobjc/objc/hash.h,v
retrieving revision 1.4
retrieving revision 1.4.14.1
diff -u -r1.4 -r1.4.14.1
--- gcc/libobjc/objc/hash.h	2002/07/02 19:43:02	1.4
+++ gcc/libobjc/objc/hash.h	2004/03/02 02:18:17	1.4.14.1
@@ -172,10 +172,10 @@
 {
   unsigned int ret = 0;
   unsigned int ctr = 0;
+  const char *ckey = key;
         
-        
-  while (*(char *) key) {
-    ret ^= *(char *) key++ << ctr;
+  while (*ckey) {
+    ret ^= *ckey++ << ctr;
     ctr = (ctr + 1) % sizeof (void *);
   }