re PR c++/81054 (ICE with volatile variable in constexpr function)

/cp
2018-01-17  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/81054
	* constexpr.c (ensure_literal_type_for_constexpr_object): Return
	error_mark_node when we give an error.
	* decl.c (cp_finish_decl): Use the latter.

/testsuite
2018-01-17  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/81054
	* g++.dg/cpp0x/constexpr-ice19.C: New.

From-SVN: r256817

gcc/testsuite/ChangeLog

+2018-01-17  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/81054
+	* g++.dg/cpp0x/constexpr-ice19.C: New.
+
 2018-01-17  Will Schmidt  <will_schmidt@vnet.ibm.com>
+
 	* gcc.target/powerpc/fold-vec-mergehl-char.c: New.
 	* gcc.target/powerpc/fold-vec-mergehl-double.c: New.
 	* gcc.target/powerpc/fold-vec-mergehl-float.c: New.