--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/testsuite/gcc.dg/pr71071.c Fri Oct 27 22:46:09 2017 +0900 @@ -0,0 +1,12 @@ +/* PR bootstrap/71071 */ +/* { dg-do compile } * +/* { dg-options "-O2" } */ + +struct S { unsigned b : 1; } a; + +void +foo () +{ + if (a.b) + ; +}