vendor/clang/clang-release_39-r276489

1 files changed, 63 insertions, 0 deletions

diff --git a/test/Sema/callingconv-cast.c b/test/Sema/callingconv-cast.c
new file mode 100644
index 0000000000000..12c0dcbc256ac
--- /dev/null
+++ b/test/Sema/callingconv-cast.c
@@ -0,0 +1,63 @@
+// RUN: %clang_cc1 -fms-extensions -triple i686-pc-windows-msvc -Wcast-calling-convention -DMSVC -Wno-pointer-bool-conversion -verify -x c %s
+// RUN: %clang_cc1 -fms-extensions -triple i686-pc-windows-msvc -Wcast-calling-convention -DMSVC -Wno-pointer-bool-conversion -verify -x c++ %s
+// RUN: %clang_cc1 -fms-extensions -triple i686-pc-windows-msvc -Wcast-calling-convention -DMSVC -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s --check-prefix=MSFIXIT
+// RUN: %clang_cc1 -triple i686-pc-windows-gnu -Wcast-calling-convention -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s --check-prefix=GNUFIXIT
+
+// expected-note@+1 {{consider defining 'mismatched_before_winapi' with the 'stdcall' calling convention}}
+void mismatched_before_winapi(int x) {}
+
+#ifdef MSVC
+#define WINAPI __stdcall
+#else
+#define WINAPI __attribute__((stdcall))
+#endif
+
+// expected-note@+1 3 {{consider defining 'mismatched' with the 'stdcall' calling convention}}
+void mismatched(int x) {}
+
+typedef void (WINAPI *callback_t)(int);
+void take_callback(callback_t callback);
+
+void WINAPI mismatched_stdcall(int x) {}
+
+void take_opaque_fn(void (*callback)(int));
+
+int main() {
+  // expected-warning@+1 {{cast between incompatible calling conventions 'cdecl' and 'stdcall'}}
+  take_callback((callback_t)mismatched);
+
+  // expected-warning@+1 {{cast between incompatible calling conventions 'cdecl' and 'stdcall'}}
+  callback_t callback = (callback_t)mismatched; // warns
+  (void)callback;
+
+  // expected-warning@+1 {{cast between incompatible calling conventions 'cdecl' and 'stdcall'}}
+  callback = (callback_t)&mismatched; // warns
+
+  // No warning, just to show we don't drill through other kinds of unary operators.
+  callback = (callback_t)!mismatched;
+
+  // expected-warning@+1 {{cast between incompatible calling conventions 'cdecl' and 'stdcall'}}
+  callback = (callback_t)&mismatched_before_winapi; // warns
+
+  // Probably a bug, but we don't warn.
+  void (*callback2)(int) = mismatched;
+  take_callback((callback_t)callback2);
+
+  // Another way to suppress the warning.
+  take_callback((callback_t)(void*)mismatched);
+
+  // Don't warn, because we're casting from stdcall to cdecl. Usually that means
+  // the programmer is rinsing the function pointer through some kind of opaque
+  // API.
+  take_opaque_fn((void (*)(int))mismatched_stdcall);
+}
+
+// MSFIXIT: fix-it:"{{.*}}callingconv-cast.c":{16:6-16:6}:"WINAPI "
+// MSFIXIT: fix-it:"{{.*}}callingconv-cast.c":{16:6-16:6}:"WINAPI "
+// MSFIXIT: fix-it:"{{.*}}callingconv-cast.c":{16:6-16:6}:"WINAPI "
+// MSFIXIT: fix-it:"{{.*}}callingconv-cast.c":{7:6-7:6}:"__stdcall "
+
+// GNUFIXIT: fix-it:"{{.*}}callingconv-cast.c":{16:6-16:6}:"WINAPI "
+// GNUFIXIT: fix-it:"{{.*}}callingconv-cast.c":{16:6-16:6}:"WINAPI "
+// GNUFIXIT: fix-it:"{{.*}}callingconv-cast.c":{16:6-16:6}:"WINAPI "
+// GNUFIXIT: fix-it:"{{.*}}callingconv-cast.c":{7:6-7:6}:"__attribute__((stdcall)) "