backport: re PR c++/79896 (ICE in gimplify_expr, at gimplify.c:11950 on non-int128...

	Backported from mainline
	2017-03-10  Jakub Jelinek  <jakub@redhat.com>

	PR c++/79896
	* decl.c (finish_enum_value_list): If value is error_mark_node,
	don't copy it and change its type.
	* init.c (constant_value_1): Return error_mark_node if DECL_INITIAL
	of CONST_DECL is error_mark_node.

	* g++.dg/ext/int128-5.C: New test.

From-SVN: r248660

diff --git a/gcc/testsuite/g++.dg/ext/int128-5.C b/gcc/testsuite/g++.dg/ext/int128-5.C
new file mode 100644 (file)
index 0000000..c2d9297
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/int128-5.C
@@ -0,0 +1,10 @@
+// PR c++/79896
+// { dg-do compile { target { ilp32 && { ! int128 } } } }
+// { dg-options "" }
+
+enum E
+{
+  e1 = 0xffffffffffffffffULL,
+  e2,                  // { dg-error "overflow in enumeration values" }
+  e3
+} e = e3;