O2. Seems tas() for PPC (storage/buffer/s_lock.c) never works if

compiled with -O0. Included are patches that should fix the problem
(of course I have confirmed -O2 works with this patch).

BTW, here is a platforms/regression test failure(serious one--backend
death) matrix.

Tatsuo Ishii

src/backend/storage/buffer/s_lock.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/storage/buffer/Attic/s_lock.c,v 1.9 1998/09/01 04:31:44 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/storage/buffer/Attic/s_lock.c,v 1.10 1998/09/03 02:14:39 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -95,10 +95,13 @@ s_lock(volatile slock_t *lock, const char *file, const int line)
 
 #if defined(PPC)
 /* Note: need a nice gcc constrained asm version so it can be inlined */
-int
-tas(volatile slock_t *lock)
+static void
+tas_dummy()
 {
-	__asm__("lwarx	5,0,3	\n\
+	__asm__("		\n\
+.global		tas		\n\
+tas:				\n\
+		lwarx	5,0,3	\n\
 		cmpwi	5,0	\n\
 		bne	fail	\n\
 		addi	5,5,1	\n\