re PR tree-optimization/45083 (strange warning text from gcc)

	PR tree-optimization/45083
	* tree-inline.c (add_local_variables): Also remap DECL_DEBUG_EXPR.

	* gcc.dg/pr45083.c: New test.

From-SVN: r162559

gcc/ChangeLog

+2010-07-27  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/45083
+	* tree-inline.c (add_local_variables): Also remap DECL_DEBUG_EXPR.
+
 2010-07-27  Bernd Schmidt  <bernds@codesourcery.com>
 
 	* postreload.c (reload_combine_recognize_const_pattern): Move test

gcc/testsuite/ChangeLog

+2010-07-27  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/45083
+	* gcc.dg/pr45083.c: New test.
+
 2010-07-26  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/40873

gcc/testsuite/gcc.dg/pr45083.c

+/* PR tree-optimization/45083 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -Wuninitialized" } */
+
+struct S { char *a; unsigned b; unsigned c; };
+extern int foo (const char *);
+extern void bar (int, int);
+
+static void
+baz (void)
+{
+  struct S cs[1];	/* { dg-message "was declared here" } */
+  switch (cs->b)	/* { dg-warning "cs\[^\n\r\]*\\.b\[^\n\r\]*is used uninitialized" } */
+    {
+    case 101:
+      if (foo (cs->a))	/* { dg-warning "cs\[^\n\r\]*\\.a\[^\n\r\]*may be used uninitialized" } */
+	bar (cs->c, cs->b);	/* { dg-warning "cs\[^\n\r\]*\\.c\[^\n\r\]*may be used uninitialized" } */
+    }
+}
+
+void
+test (void)
+{
+  baz ();
+}

gcc/tree-inline.c

@@ -3687,7 +3687,24 @@ add_local_variables (struct function *callee, struct function *caller,
 	  add_local_decl (caller, var);
       }
     else if (!can_be_nonlocal (var, id))
-      add_local_decl (caller, remap_decl (var, id));
+      {
+        tree new_var = remap_decl (var, id);
+
+        /* Remap debug-expressions.  */
+	if (TREE_CODE (new_var) == VAR_DECL
+	    && DECL_DEBUG_EXPR_IS_FROM (new_var)
+	    && new_var != var)
+	  {
+	    tree tem = DECL_DEBUG_EXPR (var);
+	    bool old_regimplify = id->regimplify;
+	    id->remapping_type_depth++;
+	    walk_tree (&tem, copy_tree_body_r, id, NULL);
+	    id->remapping_type_depth--;
+	    id->regimplify = old_regimplify;
+	    SET_DECL_DEBUG_EXPR (new_var, tem);
+	  }
+	add_local_decl (caller, new_var);
+      }
 }
 
 /* Fetch callee declaration from the call graph edge going from NODE and