erichkeane updated this revision to Diff 178282.
erichkeane added a comment.

Should catch me up on all comments except @zturner's llvm-undname feature 
request :)


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D55715/new/

https://reviews.llvm.org/D55715

Files:
  lib/AST/MicrosoftMangle.cpp
  test/CodeGenCXX/mangle-address-space.cpp

Index: test/CodeGenCXX/mangle-address-space.cpp
===================================================================
--- test/CodeGenCXX/mangle-address-space.cpp
+++ test/CodeGenCXX/mangle-address-space.cpp
@@ -1,15 +1,64 @@
-// RUN: %clang_cc1 -emit-llvm -triple %itanium_abi_triple -o - %s | FileCheck %s
+// RUN: %clang_cc1 -emit-llvm -triple %itanium_abi_triple -o - %s | FileCheck %s --check-prefixes=CHECK,CHECKNOOCL
+// RUN: %clang_cc1 -emit-llvm -triple x86_64-windows-msvc -o - %s | FileCheck %s --check-prefixes=WIN,WINNOOCL
+// RUN: %clang_cc1 -cl-std=c++ -emit-llvm -triple %itanium_abi_triple -o - %s | FileCheck %s --check-prefixes=CHECK,CHECKOCL
+// RUN: %clang_cc1 -cl-std=c++ -emit-llvm -triple x86_64-windows-msvc -o - %s | FileCheck %s --check-prefixes=WIN,WINOCL
 
-// CHECK-LABEL: define {{.*}}void @_Z2f0Pc
+// CHECKNOOCL-LABEL: define {{.*}}void @_Z2f0Pc
+// WINNOOCL-LABEL: define {{.*}}void @"?f0@@YAXPEAD@Z"
+// CHECKOCL-LABEL: define {{.*}}void @_Z2f0PU9CLgenericc
+// WINOCL-LABEL: define {{.*}}void @"?f0@@YAXPEAU?$_ASCLgeneric@$$CAD@__clang@@@Z" 
 void f0(char *p) { }
 // CHECK-LABEL: define {{.*}}void @_Z2f0PU3AS1c
+// WIN-LABEL: define {{.*}}void @"?f0@@YAXPEAU?$_AS@$00$$CAD@__clang@@@Z"
 void f0(char __attribute__((address_space(1))) *p) { }
 
 struct OpaqueType;
 typedef OpaqueType __attribute__((address_space(100))) * OpaqueTypePtr;
 
 // CHECK-LABEL: define {{.*}}void @_Z2f0PU5AS10010OpaqueType
+// WIN-LABEL: define {{.*}}void @"?f0@@YAXPEAU?$_AS@$0GE@$$CAUOpaqueType@@@__clang@@@Z"
 void f0(OpaqueTypePtr) { }
 
 // CHECK-LABEL: define {{.*}}void @_Z2f1PU3AS1Kc
-void f1(char __attribute__((address_space(1))) const *p) {}
\ No newline at end of file
+// WIN-LABEL: define {{.*}}void @"?f1@@YAXPEAU?$_AS@$00$$CBD@__clang@@@Z"
+void f1(char __attribute__((address_space(1))) const *p) {}
+
+// Ensure we can do return values, which change in MS mode.
+// CHECK-LABEL: define {{.*}}float addrspace(1)* @_Z2f1PU3AS2Kc
+// WIN-LABEL: define {{.*}}float addrspace(1)* @"?f1@@YAPEAU?$_AS@$00$$CAM@__clang@@PEAU?$_AS@$01$$CBD@2@@Z"
+__attribute__((address_space(1))) float *f1(char __attribute__((address_space(2))) const *p) { return 0;}
+
+#if !defined(__OPENCL_CPP_VERSION__)
+// Return value of address space without a pointer is invalid in opencl.
+// Ensure we skip return values, since non-pointers aren't supposed to have an AS.
+// CHECKNOOCL-LABEL: define {{.*}}float @_Z2f2PU3AS2Kc
+// WINNOOCL-LABEL: define {{.*}}float @"?f2@@YA?AMQEAU?$_AS@$01$$CBD@__clang@@@Z"
+__attribute__((address_space(1))) float f2(char __attribute__((address_space(2))) const * const p) { return 0;}
+#endif
+
+#ifdef __OPENCL_CPP_VERSION__
+// CHECKOCL-LABEL: define {{.*}}void @_Z6ocl_f0PU9CLprivatec
+// WINOCL-LABEL: define {{.*}}void @"?ocl_f0@@YAXPEAU?$_ASCLprivate@$$CAD@__clang@@@Z"
+void ocl_f0(char __private *p) { }
+
+struct ocl_OpaqueType;
+typedef ocl_OpaqueType __global * ocl_OpaqueTypePtr;
+
+// CHECKOCL-LABEL: define {{.*}}void @_Z6ocl_f0PU8CLglobal14ocl_OpaqueType
+// WINOCL-LABEL: define {{.*}}void @"?ocl_f0@@YAXPEAU?$_ASCLglobal@$$CAUocl_OpaqueType@@@__clang@@@Z"
+void ocl_f0(ocl_OpaqueTypePtr) { }
+
+// CHECKOCL-LABEL: define {{.*}}void @_Z6ocl_f1PU10CLconstantKc
+// WINOCL-LABEL: define {{.*}}void @"?ocl_f1@@YAXPEAU?$_ASCLconstant@$$CBD@__clang@@@Z"
+void ocl_f1(char __constant const *p) {}
+
+// Ensure we can do return values, which change in MS mode.
+// CHECKOCL-LABEL: define {{.*}}float* @_Z6ocl_f1PU9CLgenericKc
+// WINOCL-LABEL: define {{.*}}float* @"?ocl_f1@@YAPEAU?$_ASCLconstant@$$CAM@__clang@@PEAU?$_ASCLgeneric@$$CBD@2@@Z"
+__constant float *ocl_f1(char __generic const *p) { return 0;}
+
+// Ensure we skip return values, since non-pointers aren't supposed to have an AS.
+// CHECKOCL-LABEL: define {{.*}}float* @_Z6ocl_f2PU9CLgenericKc
+// WINOCL-LABEL: define {{.*}}float* @"?ocl_f2@@YAPEAU?$_ASCLgeneric@$$CAM@__clang@@QEAU?$_ASCLgeneric@$$CBD@2@@Z"
+__generic float *ocl_f2(__generic char const * const p) { return 0;}
+#endif
Index: lib/AST/MicrosoftMangle.cpp
===================================================================
--- lib/AST/MicrosoftMangle.cpp
+++ lib/AST/MicrosoftMangle.cpp
@@ -311,6 +311,7 @@
   void mangleTagTypeKind(TagTypeKind TK);
   void mangleArtificialTagType(TagTypeKind TK, StringRef UnqualifiedName,
                               ArrayRef<StringRef> NestedNames = None);
+  void mangleAddressSpaceType(QualType T, Qualifiers Quals, SourceRange Range);
   void mangleType(QualType T, SourceRange Range,
                   QualifierMangleMode QMM = QMM_Mangle);
   void mangleFunctionType(const FunctionType *T,
@@ -1777,12 +1778,77 @@
   }
 }
 
+void MicrosoftCXXNameMangler::mangleAddressSpaceType(QualType T,
+                                                     Qualifiers Quals,
+                                                     SourceRange Range) {
+  // Address space is mangled as an unqualified templated type in the __clang
+  // namespace. The demangled version of this is:
+  // In the case of a language specific address space:
+  // __clang::struct _AS[language_addr_space]<Type>
+  // where:
+  //  <language_addr_space> ::= <OpenCL-addrspace> | <CUDA-addrspace>
+  //    <OpenCL-addrspace> ::= "CL" [ "global" | "local" | "constant" |
+  //                                "private"| "generic" ]
+  //    <CUDA-addrspace> ::= "CU" [ "device" | "constant" | "shared" ]
+  //    Note that the above were chosen to match the Itanium mangling for this.
+  //
+  // In the case of a non-language specific address space:
+  //  __clang::struct _AS<TargetAS, Type>
+  assert(Quals.hasAddressSpace() && "Not valid without address space");
+  llvm::SmallString<32> ASMangling;
+  llvm::raw_svector_ostream Stream(ASMangling);
+  MicrosoftCXXNameMangler Extra(Context, Stream);
+  Stream << "?$";
+
+  LangAS AS = Quals.getAddressSpace();
+  if (Context.getASTContext().addressSpaceMapManglingFor(AS)) {
+    unsigned TargetAS = Context.getASTContext().getTargetAddressSpace(AS);
+    Extra.mangleSourceName("_AS");
+    Extra.mangleIntegerLiteral(llvm::APSInt::getUnsigned(TargetAS),
+                               /*IsBoolean*/ false);
+  } else {
+    switch (AS) {
+    default:
+      llvm_unreachable("Not a language specific address space");
+    case LangAS::opencl_global:
+      Extra.mangleSourceName("_ASCLglobal");
+      break;
+    case LangAS::opencl_local:
+      Extra.mangleSourceName("_ASCLlocal");
+      break;
+    case LangAS::opencl_constant:
+      Extra.mangleSourceName("_ASCLconstant");
+      break;
+    case LangAS::opencl_private:
+      Extra.mangleSourceName("_ASCLprivate");
+      break;
+    case LangAS::opencl_generic:
+      Extra.mangleSourceName("_ASCLgeneric");
+      break;
+    case LangAS::cuda_device:
+      Extra.mangleSourceName("_ASCUdevice");
+      break;
+    case LangAS::cuda_constant:
+      Extra.mangleSourceName("_ASCUconstant");
+      break;
+    case LangAS::cuda_shared:
+      Extra.mangleSourceName("_ASCUshared");
+      break;
+    }
+  }
+
+  Extra.mangleType(T, Range, QMM_Escape);
+  mangleQualifiers(Qualifiers(), false);
+  mangleArtificialTagType(TTK_Struct, ASMangling, {"__clang"});
+}
+
 void MicrosoftCXXNameMangler::mangleType(QualType T, SourceRange Range,
                                          QualifierMangleMode QMM) {
   // Don't use the canonical types.  MSVC includes things like 'const' on
   // pointer arguments to function pointers that canonicalization strips away.
   T = T.getDesugaredType(getASTContext());
   Qualifiers Quals = T.getLocalQualifiers();
+
   if (const ArrayType *AT = getASTContext().getAsArrayType(T)) {
     // If there were any Quals, getAsArrayType() pushed them onto the array
     // element type.
@@ -2488,7 +2554,11 @@
   QualType PointeeType = T->getPointeeType();
   manglePointerCVQualifiers(Quals);
   manglePointerExtQualifiers(Quals, PointeeType);
-  mangleType(PointeeType, Range);
+
+  if (PointeeType.getQualifiers().hasAddressSpace())
+    mangleAddressSpaceType(PointeeType, PointeeType.getQualifiers(), Range);
+  else
+    mangleType(PointeeType, Range);
 }
 
 void MicrosoftCXXNameMangler::mangleType(const ObjCObjectPointerType *T,
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