Improve the diagnostics of the number-reading preprocessor directives.

The GNU line marker directive was sharing code with the #line directive, but some of the warnings/errors were reporting as #line directive diagnostics in both cases.

Previously:
#line 11foo1   ==> "#line directive requires a simple digit sequence"
# 11foo1       ==> "#line directive requires a simple digit sequence"

Now, we get:
#line 11foo1   ==> "#line directive requires a simple digit sequence"
# 11foo1       ==> "GNU line marker directive requires a simple digit sequence"

llvm-svn: 179139

1 files changed, 2 insertions, 1 deletions

diff --git a/clang/test/Preprocessor/line-directive.c b/clang/test/Preprocessor/line-directive.c
index ffa7c5a4197..95a9b904de9 100644
--- a/clang/test/Preprocessor/line-directive.c
+++ b/clang/test/Preprocessor/line-directive.c
@@ -29,7 +29,7 @@
 # 42 "foo" 3 1   // expected-error {{invalid flag line marker directive}}
 # 42 "foo" 42    // expected-error {{invalid flag line marker directive}}
 # 42 "foo" 1 2   // expected-error {{invalid flag line marker directive}}
-
+# 42a33          // expected-error {{GNU line marker directive requires a simple digit sequence}}
 
 // These are checked by the RUN line.
 #line 92 "blonk.c"
@@ -83,6 +83,7 @@ typedef int q;  // original definition in system header, should not diagnose.
 // Line markers are digit strings interpreted as decimal numbers, this is
 // 10, not 8.
 #line 010  // expected-warning {{#line directive interprets number as decimal, not octal}}
+# 010      // expected-warning {{GNU line marker directive interprets number as decimal, not octal}}
 extern int array[__LINE__ == 10 ? 1:-1];
 
 /* PR3917 */