re PR debug/43190 (Used pointer typedefs eliminated from debug info)

	PR debug/43190
	* function.c (used_types_insert): Don't skip through named pointer
	types.  Don't use TYPE_MAIN_VARIANT if the original type has a name
	and it is different from the main variant's type.

	* c-c++-common/dwarf2/pr43190.c: New test.

From-SVN: r157092

gcc/ChangeLog

+2010-02-26  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/43190
+	* function.c (used_types_insert): Don't skip through named pointer
+	types.  Don't use TYPE_MAIN_VARIANT if the original type has a name
+	and it is different from the main variant's type.
+
 2010-02-26  Nick Clifton  <nickc@redhat.com>
 
 	* config/rx/rx.md (sminsi3): Remove bogus alternative.

gcc/function.c

 /* Expands front end tree to back end RTL for GCC.
    Copyright (C) 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
-   1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
-   Free Software Foundation, Inc.
+   1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
+   2010  Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -5469,8 +5469,13 @@ void
 used_types_insert (tree t)
 {
   while (POINTER_TYPE_P (t) || TREE_CODE (t) == ARRAY_TYPE)
-    t = TREE_TYPE (t);
-  t = TYPE_MAIN_VARIANT (t);
+    if (TYPE_NAME (t))
+      break;
+    else
+      t = TREE_TYPE (t);
+  if (TYPE_NAME (t) == NULL_TREE
+      || TYPE_NAME (t) == TYPE_NAME (TYPE_MAIN_VARIANT (t)))
+    t = TYPE_MAIN_VARIANT (t);
   if (debug_info_level > DINFO_LEVEL_NONE)
     {
       if (cfun)

gcc/testsuite/ChangeLog

+2010-02-26  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/43190
+	* c-c++-common/dwarf2/pr43190.c: New test.
+
 2010-02-26  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR testsuite/37074:

gcc/testsuite/c-c++-common/dwarf2/pr43190.c

+/* PR debug/43190 */
+/* { dg-options "-gdwarf-2 -dA" } */
+/* { dg-final { scan-assembler "DW_TAG_structure_type\[^\\r\\n\]*\[\\r\\n\]+\[^\\r\\n\]*\"S\[^\\r\\n\]*DW_AT_name" } } */
+/* { dg-final { scan-assembler "DW_TAG_typedef\[^\\r\\n\]*\[\\r\\n\]+\[^\\r\\n\]*\"T\[^\\r\\n\]*DW_AT_name" } } */
+
+typedef struct S { int i; } *T;
+#define M(p) ((T) (p))
+
+void
+foo (void *p)
+{
+  M (p)->i++;
+}