}
}
+static bool isDefaultStdCall(FunctionDecl *FD, Sema &S) {
+
+ // Default calling convention for main and wmain is __cdecl
+ if (FD->getName() == "main" || FD->getName() == "wmain")
+ return false;
+
+ // Default calling convention for MinGW is __cdecl
+ const llvm::Triple &T = S.Context.getTargetInfo().getTriple();
+ if (T.isWindowsGNUEnvironment())
+ return false;
+
+ // Default calling convention for WinMain, wWinMain and DllMain
+ // is __stdcall on 32 bit Windows
+ if (T.isOSWindows() && T.getArch() == llvm::Triple::x86)
+ return true;
+
+ return false;
+}
+
void Sema::CheckMSVCRTEntryPoint(FunctionDecl *FD) {
QualType T = FD->getType();
assert(T->isFunctionType() && "function decl is not of function type");
if (FD->getName() != "DllMain")
FD->setHasImplicitReturnZero(true);
+ // Explicity specified calling conventions are applied to MSVC entry points
+ if (!hasExplicitCallingConv(T)) {
+ if (isDefaultStdCall(FD, *this)) {
+ if (FT->getCallConv() != CC_X86StdCall) {
+ FT = Context.adjustFunctionType(
+ FT, FT->getExtInfo().withCallingConv(CC_X86StdCall));
+ FD->setType(QualType(FT, 0));
+ }
+ } else if (FT->getCallConv() != CC_C) {
+ FT = Context.adjustFunctionType(FT,
+ FT->getExtInfo().withCallingConv(CC_C));
+ FD->setType(QualType(FT, 0));
+ }
+ }
+
if (!FD->isInvalidDecl() && FD->getDescribedFunctionTemplate()) {
Diag(FD->getLocation(), diag::err_mainlike_template_decl) << FD;
FD->setInvalidDecl();
// RUN: %clang_cc1 -triple i486-unknown-linux-gnu -mrtd -emit-llvm -o - %s | FileCheck %s --check-prefix=STDCALL --check-prefix=ALL
// RUN: %clang_cc1 -triple i986-unknown-linux-gnu -fdefault-calling-conv=vectorcall -emit-llvm -o - %s | FileCheck %s --check-prefix=VECTORCALL --check-prefix=ALL
// RUN: %clang_cc1 -triple i986-unknown-linux-gnu -fdefault-calling-conv=regcall -emit-llvm -o - %s | FileCheck %s --check-prefix=REGCALL --check-prefix=ALL
+// RUN: %clang_cc1 -triple i686-pc-win32 -fdefault-calling-conv=vectorcall -emit-llvm -o - %s -DWINDOWS | FileCheck %s --check-prefix=WIN32
+// RUN: %clang_cc1 -triple x86_64-windows-msvc -fdefault-calling-conv=vectorcall -emit-llvm -o - %s -DWINDOWS | FileCheck %s --check-prefix=WIN64
+// RUN: %clang_cc1 -triple i686-pc-win32 -emit-llvm -o - %s -DEXPLICITCC | FileCheck %s --check-prefix=EXPLICITCC
// CDECL: define{{.*}} void @_Z5test1v
// FASTCALL: define{{.*}} x86_fastcallcc void @_Z5test1v
int main() {
return 1;
}
+
+#ifdef WINDOWS
+// WIN32: define dso_local i32 @wmain
+// WIN64: define dso_local i32 @wmain
+int wmain() {
+ return 1;
+}
+// WIN32: define dso_local x86_stdcallcc i32 @WinMain
+// WIN64: define dso_local i32 @WinMain
+int WinMain() {
+ return 1;
+}
+// WIN32: define dso_local x86_stdcallcc i32 @wWinMain
+// WIN64: define dso_local i32 @wWinMain
+int wWinMain() {
+ return 1;
+}
+// WIN32: define dso_local x86_stdcallcc i32 @DllMain
+// WIN64: define dso_local i32 @DllMain
+int DllMain() {
+ return 1;
+}
+#endif // Windows
+
+#ifdef EXPLICITCC
+// EXPLICITCC: define dso_local x86_fastcallcc i32 @wmain
+int __fastcall wmain() {
+ return 1;
+}
+// EXPLICITCC: define dso_local x86_fastcallcc i32 @WinMain
+int __fastcall WinMain() {
+ return 1;
+}
+// EXPLICITCC: define dso_local x86_fastcallcc i32 @wWinMain
+int __fastcall wWinMain() {
+ return 1;
+}
+// EXPLICITCC: define dso_local x86_fastcallcc i32 @DllMain
+int __fastcall DllMain() {
+ return 1;
+}
+#endif // ExplicitCC