r324439 - AST: support SwiftCC on MS ABI

[Saleem Abdulrasool via cfe-commits]

Author: compnerd
Date: Tue Feb  6 17:55:08 2018
New Revision: 324439

URL: http://llvm.org/viewvc/llvm-project?rev=324439&view=rev
Log:
AST: support SwiftCC on MS ABI

Microsoft has reserved the identifier 'S' as the swift calling
convention.  Decorate the symbols appropriately.  This enables swift on
Windows.

Added:
    cfe/trunk/test/CodeGenCXX/msabi-swiftcall-cc.cpp
Modified:
    cfe/trunk/lib/AST/MicrosoftMangle.cpp

Modified: cfe/trunk/lib/AST/MicrosoftMangle.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/MicrosoftMangle.cpp?rev=324439&r1=324438&r2=324439&view=diff
==============================================================================
--- cfe/trunk/lib/AST/MicrosoftMangle.cpp (original)
+++ cfe/trunk/lib/AST/MicrosoftMangle.cpp Tue Feb  6 17:55:08 2018
@@ -950,11 +950,10 @@ void MicrosoftCXXNameMangler::mangleUnqu
   }
 }
 
+// <postfix> ::= <unqualified-name> [<postfix>]
+//           ::= <substitution> [<postfix>]
 void MicrosoftCXXNameMangler::mangleNestedName(const NamedDecl *ND) {
-  // <postfix> ::= <unqualified-name> [<postfix>]
-  //           ::= <substitution> [<postfix>]
   const DeclContext *DC = getEffectiveDeclContext(ND);
-
   while (!DC->isTranslationUnit()) {
     if (isa<TagDecl>(ND) || isa<VarDecl>(ND)) {
       unsigned Disc;
@@ -2136,6 +2135,7 @@ void MicrosoftCXXNameMangler::mangleCall
     case CC_X86StdCall: Out << 'G'; break;
     case CC_X86FastCall: Out << 'I'; break;
     case CC_X86VectorCall: Out << 'Q'; break;
+    case CC_Swift: Out << 'S'; break;
     case CC_X86RegCall: Out << 'w'; break;
   }
 }

Added: cfe/trunk/test/CodeGenCXX/msabi-swiftcall-cc.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/msabi-swiftcall-cc.cpp?rev=324439&view=auto
==============================================================================
--- cfe/trunk/test/CodeGenCXX/msabi-swiftcall-cc.cpp (added)
+++ cfe/trunk/test/CodeGenCXX/msabi-swiftcall-cc.cpp Tue Feb  6 17:55:08 2018
@@ -0,0 +1,28 @@
+// RUN: %clang_cc1 -triple i686-unknown-windows-msvc -fdeclspec -emit-llvm %s -o - | FileCheck %s
+
+void __attribute__((__swiftcall__)) f() {}
+// CHECK-DAG: @"\01?f@@YSXXZ"
+
+void (__attribute__((__swiftcall__)) *p)();
+// CHECK-DAG: @"\01?p@@3P6SXXZA"
+
+namespace {
+void __attribute__((__swiftcall__)) __attribute__((__used__)) f() { }
+// CHECK-DAG: "\01?f@?A@@YSXXZ"
+}
+
+namespace n {
+void __attribute__((__swiftcall__)) f() {}
+// CHECK-DAG: "\01?f at n@@YSXXZ"
+}
+
+struct __declspec(dllexport) S {
+  S(const S &) = delete;
+  S & operator=(const S &) = delete;
+  void __attribute__((__swiftcall__)) m() { }
+  // CHECK-DAG: "\01?m at S@@QASXXZ"
+};
+
+void f(void (__attribute__((__swiftcall__))())) {}
+// CHECK-DAG: "\01?f@@YAXP6SXXZ at Z"
+