c-decl.c (duplicate_decls): Preserve the noreturn attribute on non-ANSI builtin functions.

	* c-decl.c (duplicate_decls): Preserve the noreturn attribute on
	non-ANSI builtin functions.

	* gcc.c-torture/execute/builtin-noret-1.c: Test non-ANSI functions.

From-SVN: r55396

gcc/ChangeLog

+2002-07-11  Roger Sayle  <roger@eyesopen.com>
+
+	* c-decl.c (duplicate_decls): Preserve the noreturn attribute on
+	non-ANSI builtin functions.
+
 Thu Jul 11 11:31:12 2002  J"orn Rennecke <joern.rennecke@superh.com>
 
 	* rtl.h (gen_rtx_CONST_VECTOR): Declare.

gcc/c-decl.c

@@ -1764,11 +1764,6 @@ duplicate_decls (newdecl, olddecl, different_binding_level)
       COPY_DECL_RTL (olddecl, newdecl);
 
       /* Merge the type qualifiers.  */
-      if (TREE_CODE (olddecl) == FUNCTION_DECL
-	  && DECL_BUILT_IN_NONANSI (olddecl) && TREE_THIS_VOLATILE (olddecl)
-	  && ! TREE_THIS_VOLATILE (newdecl))
-	TREE_THIS_VOLATILE (write_olddecl) = 0;
-
       if (TREE_READONLY (newdecl))
 	TREE_READONLY (write_olddecl) = 1;
 

gcc/testsuite/ChangeLog

+2002-07-11  Roger Sayle  <roger@eyesopen.com>
+
+	* gcc.c-torture/execute/builtin-noret-1.c: Test non-ANSI functions.
+
 2002-07-10  Roger Sayle  <roger@eyesopen.com>
 
 	* gcc.c-torture/execute/20000217-1.c: Fix usage of "abort".

gcc/testsuite/gcc.c-torture/execute/builtin-noret-1.c

@@ -3,10 +3,8 @@
 
 extern void abort (void);
 extern void exit (int);
-#if 0 /* Doesn't work with prototype (bug?).  */
 extern void _exit (int);
 extern void _Exit (int);
-#endif
 
 extern void tabort (void);
 extern void texit (void);