diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 1c1608fc926..83799c5d3da 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2010-09-02  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* g++.dg/debug/dwarf2/nested-2.C: Allow for ! as comment delimiter.
+
 2010-09-02  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/44937
diff --git a/gcc/testsuite/g++.dg/debug/dwarf2/nested-2.C b/gcc/testsuite/g++.dg/debug/dwarf2/nested-2.C
index 62e0c6d5d09..2ab0c375cc0 100644
--- a/gcc/testsuite/g++.dg/debug/dwarf2/nested-2.C
+++ b/gcc/testsuite/g++.dg/debug/dwarf2/nested-2.C
@@ -32,6 +32,6 @@ We want to express that the DIE of S::T<int> must be a child of the DIE of S, li
 
 Hence the slightly odd regexp:
 
-  { dg-final { scan-assembler "\[^\n\r\]*\\(DIE\[^\n\r\]*DW_TAG_structure_type\\)\[\n\r\]+\[^\n\r\]*\"S\\\\0\"\[ \t\]+\(#|//?\)\[ \t\]+DW_AT_name\[\n\r\]+\(.*\)?\\(DIE\[^\n\r\]*DW_TAG_structure_type\\)\[\n\r\]+\[^\n\r\]*\"T<int>\\\\0\"\[ \t\]+\(.*\)?\\(DIE\[^\n\r\]*DW_TAG_template_type_param\\)\[\n\r\]+\[^\n\r\]*\[\n\r\]+\[^\n\r\]*\[\n\r\]+\[^\n\r\]*\(#|//?\)\[ \t\]+end of children of DIE\[^\n\r\]*\[\n\r\]+\[^\n\r\]*end of children of DIE\[^\n\r\]*" } }
+  { dg-final { scan-assembler "\[^\n\r\]*\\(DIE\[^\n\r\]*DW_TAG_structure_type\\)\[\n\r\]+\[^\n\r\]*\"S\\\\0\"\[ \t\]+\(#|!|//?\)\[ \t\]+DW_AT_name\[\n\r\]+\(.*\)?\\(DIE\[^\n\r\]*DW_TAG_structure_type\\)\[\n\r\]+\[^\n\r\]*\"T<int>\\\\0\"\[ \t\]+\(.*\)?\\(DIE\[^\n\r\]*DW_TAG_template_type_param\\)\[\n\r\]+\[^\n\r\]*\[\n\r\]+\[^\n\r\]*\[\n\r\]+\[^\n\r\]*\(#|!|//?\)\[ \t\]+end of children of DIE\[^\n\r\]*\[\n\r\]+\[^\n\r\]*end of children of DIE\[^\n\r\]*" } }
 
  */