[PATCH] Fix PR77947

Richard Biener rguenther@suse.de
Wed Oct 12 14:35:00 GMT 2016


Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.

Richard.

2016-10-12  Richard Biener  <rguenther@suse.de>

	PR debug/77947
	* cgraphunit.c (analyze_functions): Preserve cgraph nodes
	function context.

	* g++.dg/torture/pr77947.C: New testcase.

Index: gcc/cgraphunit.c
===================================================================
--- gcc/cgraphunit.c	(revision 241033)
+++ gcc/cgraphunit.c	(working copy)
@@ -1117,15 +1117,22 @@ analyze_functions (bool first_time)
 		}
 
 	      /* If decl is a clone of an abstract function,
-	      mark that abstract function so that we don't release its body.
-	      The DECL_INITIAL() of that abstract function declaration
-	      will be later needed to output debug info.  */
+		 mark that abstract function so that we don't release its body.
+		 The DECL_INITIAL() of that abstract function declaration
+		 will be later needed to output debug info.  */
 	      if (DECL_ABSTRACT_ORIGIN (decl))
 		{
 		  cgraph_node *origin_node
 		    = cgraph_node::get_create (DECL_ABSTRACT_ORIGIN (decl));
 		  origin_node->used_as_abstract_origin = true;
 		}
+	      /* Preserve a functions function context node.  It will
+		 later be needed to output debug info.  */
+	      if (tree fn = decl_function_context (decl))
+		{
+		  cgraph_node *origin_node = cgraph_node::get_create (fn);
+		  enqueue_node (origin_node);
+		}
 	    }
 	  else
 	    {
Index: gcc/testsuite/g++.dg/torture/pr77947.C
===================================================================
--- gcc/testsuite/g++.dg/torture/pr77947.C	(revision 0)
+++ gcc/testsuite/g++.dg/torture/pr77947.C	(revision 0)
@@ -0,0 +1,29 @@
+// { dg-do compile }
+// { dg-additional-options "-g" }
+
+class A
+{
+public:
+  virtual bool m_fn1 () const = 0;
+};
+class B
+{
+  const A *m_fn2 () const;
+};
+inline const A *
+B::m_fn2 () const
+{
+  class C : A
+  {
+    bool
+    m_fn1 () const
+    {
+    }
+    C () {}
+  };
+}
+void
+fn1 (A &p1)
+{
+  p1.m_fn1 ();
+}



More information about the Gcc-patches mailing list