re PR target/51900 (const variable initialization always zero)

	PR target/51900
	* config/i386/predicates.md (symbolic_operand): Allow
	UNSPEC_PCREL as PIC expression for lea.
	* config/i386/winnt.c (i386_pe_binds_local_p): Reworked.
	* config/i386/i386.c (ix86_delegitimize_address): Handle
	UNSPEC_PCREL for none-MEM, too.

From-SVN: r183450

gcc/ChangeLog

+2012-01-23  Kai Tietz  <ktietz@redhat.com>
+
+	PR target/51900
+	* config/i386/predicates.md (symbolic_operand): Allow
+	UNSPEC_PCREL as PIC expression for lea.
+	* config/i386/winnt.c (i386_pe_binds_local_p): Reworked.
+	* config/i386/i386.c (ix86_delegitimize_address): Handle
+	UNSPEC_PCREL for none-MEM, too.
+
 2012-01-23  Aldy Hernandez  <aldyh@redhat.com>
 
 	* trans-mem.c (ipa_tm_create_version): Set externally_visible.

gcc/config/i386/i386.c

@@ -13231,10 +13231,10 @@ ix86_delegitimize_address (rtx x)
 	  || GET_CODE (XEXP (x, 0)) != UNSPEC
 	  || (XINT (XEXP (x, 0), 1) != UNSPEC_GOTPCREL
 	      && XINT (XEXP (x, 0), 1) != UNSPEC_PCREL)
-	  || !MEM_P (orig_x))
+	  || (!MEM_P (orig_x) && XINT (XEXP (x, 0), 1) != UNSPEC_PCREL))
 	return ix86_delegitimize_tls_address (orig_x);
       x = XVECEXP (XEXP (x, 0), 0, 0);
-      if (GET_MODE (orig_x) != GET_MODE (x))
+      if (GET_MODE (orig_x) != GET_MODE (x) && MEM_P (orig_x))
 	{
 	  x = simplify_gen_subreg (GET_MODE (orig_x), x,
 				   GET_MODE (x), 0);

gcc/config/i386/predicates.md

@@ -410,6 +410,7 @@
 	  || (GET_CODE (op) == UNSPEC
 	      && (XINT (op, 1) == UNSPEC_GOT
 		  || XINT (op, 1) == UNSPEC_GOTOFF
+		  || XINT (op, 1) == UNSPEC_PCREL
 		  || XINT (op, 1) == UNSPEC_GOTPCREL)))
 	return true;
       if (GET_CODE (op) != PLUS

gcc/config/i386/winnt.c

@@ -350,21 +350,22 @@ i386_pe_encode_section_info (tree decl, rtx rtl, int first)
   SYMBOL_REF_FLAGS (symbol) = flags;
 }
 
+
 bool
 i386_pe_binds_local_p (const_tree exp)
 {
-  /* PE does not do dynamic binding.  Indeed, the only kind of
-     non-local reference comes from a dllimport'd symbol.  */
   if ((TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == FUNCTION_DECL)
       && DECL_DLLIMPORT_P (exp))
     return false;
 
-  /* Or a weak one, now that they are supported.  */
-  if ((TREE_CODE (exp) == VAR_DECL || TREE_CODE (exp) == FUNCTION_DECL)
-      && DECL_WEAK (exp))
-    return false;
-
-  return true;
+  /* External public symbols, which aren't weakref-s,
+     have local-binding for PE targets.  */
+  if (DECL_P (exp)
+      && !lookup_attribute ("weakref", DECL_ATTRIBUTES (exp))
+      && TREE_PUBLIC (exp)
+      && DECL_EXTERNAL (exp))
+    return true;
+  return default_binds_local_p_1 (exp, 0);
 }
 
 /* Also strip the fastcall prefix and stdcall suffix.  */