From afac01d7e76f28d5e5a5c377369cc400919387ee Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Wed, 1 Sep 2010 16:29:03 +0000
Subject: [PATCH] Transfer calling-convention attributes down to member
 function pointers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@112715 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AST/ASTContext.cpp               |  9 +++++++++
 lib/Sema/SemaType.cpp                | 12 ++++++++++--
 test/SemaCXX/MicrosoftExtensions.cpp | 13 +++++++++++++
 3 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index 574ada3980..4591a0f3c5 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -1124,6 +1124,15 @@ static QualType getExtFunctionType(ASTContext& Context, QualType T,
       return T;
 
     ResultType = Context.getBlockPointerType(ResultType);
+  } else if (const MemberPointerType *MemberPointer 
+                                            = T->getAs<MemberPointerType>()) {
+    QualType Pointee = MemberPointer->getPointeeType();
+    ResultType = getExtFunctionType(Context, Pointee, Info);
+    if (ResultType == Pointee)
+      return T;
+    
+    ResultType = Context.getMemberPointerType(ResultType, 
+                                              MemberPointer->getClass());
    } else if (const FunctionType *F = T->getAs<FunctionType>()) {
     if (F->getExtInfo() == Info)
       return T;
diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index 8988de8355..bb2fb99033 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -1846,7 +1846,8 @@ bool ProcessFnAttr(Sema &S, QualType &Type, const AttributeList &Attr) {
     // Delay if this is not a function or pointer to block.
     if (!Type->isFunctionPointerType()
         && !Type->isBlockPointerType()
-        && !Type->isFunctionType())
+        && !Type->isFunctionType()
+        && !Type->isMemberFunctionPointerType())
       return true;
     
     if (!GetResultType(Type)->isVoidType()) {
@@ -1868,7 +1869,8 @@ bool ProcessFnAttr(Sema &S, QualType &Type, const AttributeList &Attr) {
     // Delay if this is not a function or pointer to block.
     if (!Type->isFunctionPointerType()
         && !Type->isBlockPointerType()
-        && !Type->isFunctionType())
+        && !Type->isFunctionType()
+        && !Type->isMemberFunctionPointerType())
       return true;
 
     // Otherwise we can process right away.
@@ -1894,6 +1896,12 @@ bool ProcessFnAttr(Sema &S, QualType &Type, const AttributeList &Attr) {
   QualType T = Type;
   if (const PointerType *PT = Type->getAs<PointerType>())
     T = PT->getPointeeType();
+  else if (const BlockPointerType *BPT = Type->getAs<BlockPointerType>())
+    T = BPT->getPointeeType();
+  else if (const MemberPointerType *MPT = Type->getAs<MemberPointerType>())
+    T = MPT->getPointeeType();
+  else if (const ReferenceType *RT = Type->getAs<ReferenceType>())
+    T = RT->getPointeeType();
   const FunctionType *Fn = T->getAs<FunctionType>();
 
   // Delay if the type didn't work out to a function.
diff --git a/test/SemaCXX/MicrosoftExtensions.cpp b/test/SemaCXX/MicrosoftExtensions.cpp
index 48d4194197..fb3107f44e 100644
--- a/test/SemaCXX/MicrosoftExtensions.cpp
+++ b/test/SemaCXX/MicrosoftExtensions.cpp
@@ -29,3 +29,16 @@ struct Derived : Base {
   virtual void f2() throw(...);
   virtual void f3();
 };
+
+// __stdcall handling
+struct M {
+    int __stdcall addP();
+    float __stdcall subtractP(); 
+};
+
+template<typename T> void h1(T (__stdcall M::* const )()) { }
+
+void m1() {
+  h1<int>(&M::addP);
+  h1(&M::subtractP);
+} 
-- 
2.40.0