Implement handling of file entry/exit notifications from GNU

line markers, including maintenance of the virtual include stack.

For something like this:

# 42 "bar.c" 1
# 142 "bar2.c" 1

#warning zappa
# 92 "bar.c" 2
#warning gonzo
# 102 "foo.c" 2
#warning bonkta


we now produce these three warnings:

#1:
In file included from foo.c:3:
In file included from bar.c:42:
bar2.c:143:2: warning: #warning zappa
#warning zappa
 ^

#2:
In file included from foo.c:3:
bar.c:92:2: warning: #warning gonzo
#warning gonzo
 ^

#3:
foo.c:102:2: warning: #warning bonkta
#warning bonkta
 ^




git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63722 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 4 deletions

diff --git a/test/Preprocessor/line-directive.c b/test/Preprocessor/line-directive.c
index 062081c6bc..a1590fa333 100644
--- a/test/Preprocessor/line-directive.c
+++ b/test/Preprocessor/line-directive.c
@@ -6,7 +6,7 @@
 #line 0              // expected-error {{#line directive requires a positive integer argument}}
 #line 2147483648     // expected-warning {{C requires #line number to be less than 2147483648, allowed as extension}}
 #line 42             // ok
-#line 42 'a'         // expected-error {{nvalid filename for #line directive}}
+#line 42 'a'         // expected-error {{invalid filename for #line directive}}
 #line 42 "foo/bar/baz.h"  // ok
 
 
@@ -16,9 +16,10 @@
 
 # 42
 # 42 "foo"
-# 42 "foo" 1 3
-# 42 "foo" 2 3
-# 42 "foo" 2 3 4
+# 42 "foo" 2 // expected-error {{invalid line marker flag '2': cannot pop empty include stack}}
+# 42 "foo" 1 3  // enter
+# 42 "foo" 2 3  // exit
+# 42 "foo" 2 3 4 // expected-error {{invalid line marker flag '2': cannot pop empty include stack}}
 # 42 "foo" 3 4
 
 # 'a'            // expected-error {{invalid preprocessing directive}}