C++/ABI/x86_64: Member pointers should be classified as INTEGER.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@103843 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/TargetInfo.cpp

@@ -853,6 +853,11 @@ void X86_64ABIInfo::classify(QualType Ty,
     classify(ET->getDecl()->getIntegerType(), Context, OffsetBase, Lo, Hi);
   } else if (Ty->hasPointerRepresentation()) {
     Current = Integer;
+  } else if (Ty->isMemberPointerType()) {
+    if (Ty->isMemberFunctionPointerType())
+      Lo = Hi = Integer;
+    else
+      Current = Integer;
   } else if (const VectorType *VT = Ty->getAs<VectorType>()) {
     uint64_t Size = Context.getTypeSize(VT);
     if (Size == 32) {

test/CodeGenCXX/x86_64-arguments.cpp

@@ -25,3 +25,11 @@ void f2(f2_s1 a0) { }
 struct s3_0 {};
 struct s3_1 { struct s3_0 a; long b; };
 void f3(struct s3_1 x) {}
+
+// CHECK: define i64 @_Z4f4_0M2s4i(i64)
+// CHECK: define [[i64_i64_ty]] @_Z4f4_1M2s4FivE([[i64_i64_ty]])
+struct s4 {};
+typedef int s4::* s4_mdp;
+typedef int (s4::*s4_mfp)();
+s4_mdp f4_0(s4_mdp a) { return a; }
+s4_mfp f4_1(s4_mfp a) { return a; }