Format strings: %Ld isn't available on Darwin or Windows.

This seems to be a GNU libc extension; we offer a fixit to %lld on
these platforms.

<rdar://problem/11518237>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@163452 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 55 insertions, 0 deletions

diff --git a/test/Sema/format-strings-gnu.c b/test/Sema/format-strings-gnu.c
new file mode 100644
index 0000000000..f4910856b0
--- /dev/null
+++ b/test/Sema/format-strings-gnu.c
@@ -0,0 +1,55 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -triple i386-apple-darwin9 %s
+// RUN: %clang_cc1 -fsyntax-only -verify -triple thumbv6-apple-ios4.0 %s
+// RUN: %clang_cc1 -fsyntax-only -verify -triple x86_64-mingw32 %s
+// RUN: %clang_cc1 -fsyntax-only -verify -triple i686-pc-win32 %s
+
+// RUN: %clang_cc1 -fsyntax-only -verify -triple i686-linux-gnu -DALLOWED %s
+// RUN: %clang_cc1 -fsyntax-only -verify -triple x86_64-unknown-freebsd -DALLOWED %s
+
+int printf(const char *restrict, ...);
+int scanf(const char * restrict, ...) ;
+
+void test() {
+  long notLongEnough = 1;
+  long long quiteLong = 2;
+
+  printf("%Ld", notLongEnough); // expected-warning {{format specifies type 'long long' but the argument has type 'long'}}
+  printf("%Ld", quiteLong);
+
+#ifndef ALLOWED
+  // expected-warning@-4 {{length modifier 'L' results in undefined behavior or no effect with 'd' conversion specifier}}
+  // expected-note@-5 {{did you mean to use 'll'?}}
+
+  // expected-warning@-6 {{length modifier 'L' results in undefined behavior or no effect with 'd' conversion specifier}}
+  // expected-note@-7 {{did you mean to use 'll'?}}
+#endif
+}
+
+void testAlwaysInvalid() {
+  // We should not suggest 'll' here!
+  printf("%Lc", 'a'); // expected-warning {{length modifier 'L' results in undefined behavior or no effect with 'c' conversion specifier}}
+  printf("%Ls", "a"); // expected-warning {{length modifier 'L' results in undefined behavior or no effect with 's' conversion specifier}}
+}
+
+#ifdef ALLOWED
+// 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}}
+}
+
+void scanf_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}}
+}
+#endif