1 files changed, 32 insertions, 0 deletions
diff --git a/clang/test/Sema/implicit-decl.c b/clang/test/Sema/implicit-decl.c
new file mode 100644
index 0000000..ffab9a6
--- /dev/null
+++ b/clang/test/Sema/implicit-decl.c
@@ -0,0 +1,32 @@
+// RUN: %clang_cc1 %s -verify -fsyntax-only -Werror
+
+typedef int int32_t;
+typedef unsigned char Boolean;
+
+extern int printf(__const char *__restrict __format, ...); // expected-note{{'printf' declared here}}
+
+void func() {
+   int32_t *vector[16];
+   const char compDesc[16 + 1];
+   int32_t compCount = 0;
+   if (_CFCalendarDecomposeAbsoluteTimeV(compDesc, vector, compCount)) { // expected-note {{previous implicit declaration is here}} \
+         expected-error {{implicit declaration of function '_CFCalendarDecomposeAbsoluteTimeV' is invalid in C99}}
+   }
+
+   printg("Hello, World!\n"); // expected-error{{implicit declaration of function 'printg' is invalid in C99}} \
+                              // expected-note{{did you mean 'printf'?}}
+
+  __builtin_is_les(1, 3); // expected-error{{use of unknown builtin '__builtin_is_les'}}
+}
+Boolean _CFCalendarDecomposeAbsoluteTimeV(const char *componentDesc, int32_t **vector, int32_t count) { // expected-error{{conflicting types for '_CFCalendarDecomposeAbsoluteTimeV'}}
+ return 0;
+}
+
+
+// Test the typo-correction callback in Sema::ImplicitlyDefineFunction
+extern int sformatf(char *str, __const char *__restrict __format, ...); // expected-note{{'sformatf' declared here}}
+void test_implicit() {
+  int formats = 0;
+  formatd("Hello, World!\n"); // expected-error{{implicit declaration of function 'formatd' is invalid in C99}} \
+                              // expected-note{{did you mean 'sformatf'?}}
+}