Fix PR3917: the location of a #line directive is the location of the first _.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69485 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/line-directive.c b/test/Preprocessor/line-directive.c
index 04c69a6..a9ed4bc 100644
--- a/test/Preprocessor/line-directive.c
+++ b/test/Preprocessor/line-directive.c
@@ -79,3 +79,11 @@
#line 010 // expected-warning {{#line directive interprets number as decimal, not octal}}
extern int array[__LINE__ == 10 ? 1:-1];
+/* PR3917 */
+#line 41
+extern char array2[\
+_\
+_LINE__ == 42 ? 1: -1]; /* line marker is location of first _ */
+
+
+