Allowing individual targets to determine whether a given calling convention is allowed or ignored with warning. This allows for correct name mangling for x64 targets on Windows, which in turn allows for linking against the Win32 APIs.

Fixes PR13782

llvm-svn: 165015

3 files changed, 41 insertions, 2 deletions

diff --git a/clang/test/CodeGen/microsoft-call-conv-x64.c b/clang/test/CodeGen/microsoft-call-conv-x64.c
new file mode 100644
index 00000000000..9a0aa59207d
--- /dev/null
+++ b/clang/test/CodeGen/microsoft-call-conv-x64.c
@@ -0,0 +1,39 @@
+// RUN: %clang_cc1 -triple x86_64-pc-win32 -emit-llvm < %s | FileCheck %s

+

+void __fastcall f1(void);

+void __stdcall f2(void);

+void __fastcall f4(void) {

+// CHECK: define void @f4()

+  f1();

+// CHECK: call void @f1()

+}

+void __stdcall f5(void) {

+// CHECK: define void @f5()

+  f2();

+// CHECK: call void @f2()

+}

+

+// PR5280

+void (__fastcall *pf1)(void) = f1;

+void (__stdcall *pf2)(void) = f2;

+void (__fastcall *pf4)(void) = f4;

+void (__stdcall *pf5)(void) = f5;

+

+int main(void) {

+    f4(); f5();

+    // CHECK: call void @f4()

+    // CHECK: call void @f5()

+    pf1(); pf2(); pf4(); pf5();

+    // CHECK: call void %{{.*}}()

+    // CHECK: call void %{{.*}}()

+    // CHECK: call void %{{.*}}()

+    // CHECK: call void %{{.*}}()

+    return 0;

+}

+

+// PR7117

+void __stdcall f7(foo) int foo; {}

+void f8(void) {

+  f7(0);

+  // CHECK: call void @f7(i32 0)

+}

diff --git a/clang/test/CodeGen/microsoft-call-conv.c b/clang/test/CodeGen/microsoft-call-conv.c
index 390c3be05e6..64d10fb4f4f 100644
--- a/clang/test/CodeGen/microsoft-call-conv.c
+++ b/clang/test/CodeGen/microsoft-call-conv.c
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -emit-llvm < %s | FileCheck %s
+// RUN: %clang_cc1 -triple i386-pc-linux -emit-llvm < %s | FileCheck %s
 
 void __fastcall f1(void);
 void __stdcall f2(void);
diff --git a/clang/test/CodeGen/stdcall-fastcall.c b/clang/test/CodeGen/stdcall-fastcall.c
index 3de7b6727bc..2832e911231 100644
--- a/clang/test/CodeGen/stdcall-fastcall.c
+++ b/clang/test/CodeGen/stdcall-fastcall.c
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -emit-llvm < %s | FileCheck %s
+// RUN: %clang_cc1 -triple i386-unknown-unknown -emit-llvm < %s | FileCheck %s
 
 void __attribute__((fastcall)) f1(void);
 void __attribute__((stdcall)) f2(void);