re PR c++/87506 (ICE with inherited constexpr constructor with const argument)

	PR c++/87506
	* constexpr.c (adjust_temp_type): Handle EMPTY_CLASS_EXPR.

	* g++.dg/cpp0x/constexpr-87506.C: New test.

From-SVN: r266877

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 707058064e09b728b8ad7c65ae5862dcee836d54..df8a9d09bd2158e1427165f1f9953d24e33a3397 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+2018-12-07  Jakub Jelinek  <jakub@redhat.com>
+
+       PR c++/87506
+       * constexpr.c (adjust_temp_type): Handle EMPTY_CLASS_EXPR.
+
 2018-12-06  Paolo Carlini  <paolo.carlini@oracle.com>
 
        * class.c (check_bitfield_decl): In error message about non-integral
@@ -6,7 +11,7 @@
        friends; when calling build_decl for a FIELD_DECL possibly pass the
        declarator->id_loc.
 
-2018-12-06  Alexandre Oliva <aoliva@redhat.com>
+2018-12-06  Alexandre Oliva  <aoliva@redhat.com>
 
        PR c++/86747
        * pt.c (tsubst_friend_class): Enter tsubsted class context.

diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c
index a668d14e8bf5c270e917d8dad9dbac18998fa585..1c844a8c2eff20b0c9a184c00f1a5e89d4b53118 100644 (file)
--- a/gcc/cp/constexpr.c
+++ b/gcc/cp/constexpr.c
@@ -1281,6 +1281,8 @@ adjust_temp_type (tree type, tree temp)
   /* Avoid wrapping an aggregate value in a NOP_EXPR.  */
   if (TREE_CODE (temp) == CONSTRUCTOR)
     return build_constructor (type, CONSTRUCTOR_ELTS (temp));
+  if (TREE_CODE (temp) == EMPTY_CLASS_EXPR)
+    return build0 (EMPTY_CLASS_EXPR, type);
   gcc_assert (scalarish_type_p (type));
   return cp_fold_convert (type, temp);
 }

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9f2b5cf66f849f55089219ade5971b41d7ef7711..571f2b55d403d2b36a315a34c1158f7b48cd7b41 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-12-07  Jakub Jelinek  <jakub@redhat.com>
+
+       PR c++/87506
+       * g++.dg/cpp0x/constexpr-87506.C: New test.
+
 2018-12-06  Paolo Carlini  <paolo.carlini@oracle.com>
 
        * g++.dg/parse/bitfield7.C: New.
@@ -5,7 +10,7 @@
        * g++.dg/parse/bitfield1.C: Likewise.
        * g++.dg/parse/bitfield2.C: Likewise.
 
-2018-12-06  Alexandre Oliva <aoliva@redhat.com>
+2018-12-06  Alexandre Oliva  <aoliva@redhat.com>
 
        PR c++/86747
        * g++.dg/pr86747.C: New.

diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-87506.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-87506.C
new file mode 100644 (file)
index 0000000..62d2ddc
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-87506.C
@@ -0,0 +1,12 @@
+// PR c++/87506
+// { dg-do compile { target c++11 } }
+
+struct A {};
+struct B { constexpr B (const A) {} };
+struct C : B { using B::B; };
+
+void
+foo ()
+{
+  C c (A{});
+}