[C++ PATCH] Fix up DW_AT_explicit handling (PR debug/56563)

[Jakub Jelinek]

Hi!

Say on
struct S { explicit S () {}; } s;
struct T { explicit T (int x) {}; } t(2);
struct U { explicit operator int () { return 6; } } u;
G++ mysteriously emits DW_AT_explicit only on T::T(int) and not
on S::S() nor U::operator int().

Fixed thusly, ok for trunk?

2014-02-19  Jakub Jelinek  <ja...@redhat.com>

        PR debug/56563
        * cp-objcp-common.c (cp_function_decl_explicit_p): Remove
        FUNCTION_FIRST_USER_PARMTYPE (decl) != void_list_node check.

--- gcc/cp/cp-objcp-common.c.jj 2014-01-02 23:50:57.000000000 +0100
+++ gcc/cp/cp-objcp-common.c    2014-02-19 15:13:05.576141197 +0100
@@ -160,7 +160,6 @@ bool
 cp_function_decl_explicit_p (tree decl)
 {
   return (decl
-         && FUNCTION_FIRST_USER_PARMTYPE (decl) != void_list_node
          && DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl))
          && DECL_NONCONVERTING_P (decl));
 }

        Jakub