c-decl.c (grokdeclarator): Do not complain about redeclaring visible "static"…

c-decl.c (grokdeclarator): Do not complain about redeclaring visible "static" identifiers "extern" in a...

	* c-decl.c (grokdeclarator): Do not complain about redeclaring
	visible "static" identifiers "extern" in a local scope.

	* dwarf2out.c (loc_descriptor_from_tree): Handle pre- and
	post-increments/decrements.

	* gcc.dg/local1.c: New test.

	* gcc.dg/debug/dwarf2/c99-typedef1.c: New test.

From-SVN: r79634

gcc/ChangeLog

+2004-03-18  Mark Mitchell  <mark@codesourcery.com>
+
+	* c-decl.c (grokdeclarator): Do not complain about redeclaring
+	visible "static" identifiers "extern" in a local scope.
+	* dwarf2out.c (loc_descriptor_from_tree): Handle pre- and
+	post-increments/decrements.
+
 2004-03-18  Bob Wilson  <bob.wilson@acm.org>
 
 	* config/xtensa/xtensa.c (current_function_arg_words): Delete.

gcc/c-decl.c

@@ -4416,7 +4416,7 @@ grokdeclarator (tree declarator, tree declspecs,
 
 	/* It is invalid to create an `extern' declaration for a
 	   variable if there is a global declaration that is
-	   `static'.  */
+	   `static' and the global declaration is not visible.  */
 	if (extern_ref && current_scope != global_scope)
 	  {
 	    tree global_decl;
@@ -4424,6 +4424,7 @@ grokdeclarator (tree declarator, tree declspecs,
 	    global_decl = identifier_global_value (declarator);
 	    if (global_decl
 		&& TREE_CODE (global_decl) == VAR_DECL
+		&& lookup_name (declarator) != global_decl
 		&& !TREE_PUBLIC (global_decl))
 	      error ("variable previously declared `static' redeclared "
 		     "`extern'");

gcc/dwarf2out.c

@@ -8716,6 +8716,13 @@ loc_descriptor_from_tree (tree loc, int addressp)
     case CALL_EXPR:
       return 0;
 
+    case PREINCREMENT_EXPR:
+    case PREDECREMENT_EXPR:
+    case POSTINCREMENT_EXPR:
+    case POSTDECREMENT_EXPR:
+      /* There are no opcodes for these operations.  */
+      return 0;
+
     case ADDR_EXPR:
       /* We can support this only if we can look through conversions and
 	 find an INDIRECT_EXPR.  */

gcc/testsuite/ChangeLog

+2004-03-18  Mark Mitchell  <mark@codesourcery.com>
+
+	* gcc.dg/local1.c: New test.
+
+	* gcc.dg/debug/dwarf2/c99-typedef1.c: New test.
+
 2004-03-17  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* gcc.dg/torture/builtin-convert-1.c: New test.

gcc/testsuite/gcc.dg/debug/dwarf2/c99-typedef1.c

+// { dg-options "-std=iso9899:1999 -gdwarf-2" }
+
+void f() {
+  int n = 3;
+  typedef int T[n++];
+  
+  T t;
+  t[0] = 7;
+}

gcc/testsuite/gcc.dg/local1.c

+static int i;
+
+extern int i;
+
+static void f() {
+  extern int i;
+}