re PR debug/49047 (DW_AT_linkage_name missing for constructors and destructors)

Fix PR debug/49047

gcc/

	* dwarf2out.c (gen_subprogram_die): Emit linkage name attribute
	for concrete functions containing the code of cloned functions.

gcc/testsuite/

	* g++.dg/debug/dwarf2/cdtor-1.C: New test.

From-SVN: r174474

gcc/ChangeLog

+2011-05-31  Dodji Seketeli  <dodji@redhat.com>
+
+	PR debug/49047
+	* dwarf2out.c (gen_subprogram_die): Emit linkage name attribute
+    	for concrete functions containing the code of cloned functions.
+
 2011-05-31  Richard Guenther  <rguenther@suse.de>
 
 	* tree-ssa-forwprop.c (forward_propagate_into_comparison): Rename

gcc/dwarf2out.c

@@ -19636,6 +19636,12 @@ gen_subprogram_die (tree decl, dw_die_ref context_die)
 
       subr_die = new_die (DW_TAG_subprogram, context_die, decl);
       add_abstract_origin_attribute (subr_die, origin);
+      /*  This is where the actual code for a cloned function is.
+	  Let's emit linkage name attribute for it.  This helps
+	  debuggers to e.g, set breakpoints into
+	  constructors/destructors when the user asks "break
+	  K::K".  */
+      add_linkage_name (subr_die, decl);
     }
   else if (old_die)
     {

gcc/testsuite/ChangeLog

+2011-05-31  Dodji Seketeli  <dodji@redhat.com>
+
+	PR debug/49047
+	* g++.dg/debug/dwarf2/cdtor-1.C: New test.
+
 2011-05-31  Ira Rosen  <ira.rosen@linaro.org>
 
 	PR testsuite/49239

gcc/testsuite/g++.dg/debug/dwarf2/cdtor-1.C

+// origin PR debug/49047
+// { dg-options "-g -dA" }
+// { dg-do compile }
+
+struct K
+{
+  K () { }
+  ~K () { }
+};
+
+int
+main()
+{
+    K k;
+}
+
+// { dg-final {scan-assembler-times "\[^\n\r\]*DW_AT_MIPS_linkage_name:" 2 } }