Teach scanf/printf checking about '%Ld' and friends (a GNU extension). Fixes PR 9466.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148859 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 21 insertions, 0 deletions

diff --git a/test/Sema/format-strings-scanf.c b/test/Sema/format-strings-scanf.c
index 6962a97611..d89dbc494b 100644
--- a/test/Sema/format-strings-scanf.c
+++ b/test/Sema/format-strings-scanf.c
@@ -103,3 +103,13 @@ void test_alloc_extension(char **sp, wchar_t **lsp, float *fp) {
   scanf("%m[abc]", fp); // expected-warning{{format specifies type 'char **' but the argument has type 'float *'}}
 }
 
+void test_longlong(long long *x, unsigned long long *y) {
+  scanf("%Ld", y); // no-warning
+  scanf("%Lu", y); // no-warning
+  scanf("%Lx", y); // no-warning
+  scanf("%Ld", x); // no-warning
+  scanf("%Lu", x); // no-warning
+  scanf("%Lx", x); // no-warning
+  scanf("%Ls", "hello"); // expected-warning {{length modifier 'L' results in undefined behavior or no effect with 's' conversion specifier}}
+}
+
diff --git a/test/Sema/format-strings.c b/test/Sema/format-strings.c
index e32ad245e3..9daaf3b0a5 100644
--- a/test/Sema/format-strings.c
+++ b/test/Sema/format-strings.c
@@ -469,3 +469,14 @@ void pr9751() {
   // when the original string is within the argument expression.
   printf(1 ? "yes %d" : "no %d"); // expected-warning 2{{more '%' conversions than data arguments}}
 }
+
+// PR 9466: clang: doesn't know about %Lu, %Ld, and %Lx 
+void printf_longlong(long long x, unsigned long long y) {
+  printf("%Ld", y); // no-warning
+  printf("%Lu", y); // no-warning
+  printf("%Lx", y); // no-warning
+  printf("%Ld", x); // no-warning
+  printf("%Lu", x); // no-warning
+  printf("%Lx", x); // no-warning
+  printf("%Ls", "hello"); // expected-warning {{length modifier 'L' results in undefined behavior or no effect with 's' conversion specifier}}
+}