Hi!
On the 7.x branch, without the fix offsetof2.C testcase passes at -O0,
which is how it is compiled in the testsuite, and only fails at -O2.
Thus, this patch adds a copy of that testcase to be compiled for -O2, so
that it is tested too, and I'll backport then both the original fix and this
new addition.
Tested on x86_64-linux, committed to trunk and 8.2.
2018-06-22 Jakub Jelinek <ja...@redhat.com>
PR c++/85662
* g++.dg/ext/offsetof3.C: New test.
--- gcc/testsuite/g++.dg/ext/offsetof3.C.jj 2018-06-22 19:20:34.530606396
+0200
+++ gcc/testsuite/g++.dg/ext/offsetof3.C 2018-06-22 19:20:53.313622055
+0200
@@ -0,0 +1,5 @@
+// PR c++/85662
+// { dg-do compile { target c++11 } }
+// { dg-options "-O2" }
+
+#include "offsetof2.C"
Jakub
