First pass at abstracting out a class for the target C++ ABI.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173514 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 23 insertions, 16 deletions

diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index fff2f82e23..b5d60f589b 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -583,12 +583,13 @@ ASTContext::getCanonicalTemplateTemplateParmDecl(
 CXXABI *ASTContext::createCXXABI(const TargetInfo &T) {
   if (!LangOpts.CPlusPlus) return 0;
 
-  switch (T.getCXXABI()) {
-  case CXXABI_ARM:
+  switch (T.getCXXABI().getKind()) {
+  case TargetCXXABI::GenericARM:
+  case TargetCXXABI::iOS:
     return CreateARMCXXABI(*this);
-  case CXXABI_Itanium:
+  case TargetCXXABI::GenericItanium:
     return CreateItaniumCXXABI(*this);
-  case CXXABI_Microsoft:
+  case TargetCXXABI::Microsoft:
     return CreateMicrosoftCXXABI(*this);
   }
   llvm_unreachable("Invalid CXXABI type!");
@@ -7607,7 +7608,8 @@ CallingConv ASTContext::getDefaultCXXMethodCallConv(bool isVariadic) {
 }
 
 CallingConv ASTContext::getCanonicalCallConv(CallingConv CC) const {
-  if (CC == CC_C && !LangOpts.MRTD && getTargetInfo().getCXXABI() != CXXABI_Microsoft)
+  if (CC == CC_C && !LangOpts.MRTD &&
+      getTargetInfo().getCXXABI().isMemberFunctionCCDefault())
     return CC_Default;
   return CC;
 }
@@ -7618,11 +7620,12 @@ bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const {
 }
 
 MangleContext *ASTContext::createMangleContext() {
-  switch (Target->getCXXABI()) {
-  case CXXABI_ARM:
-  case CXXABI_Itanium:
+  switch (Target->getCXXABI().getKind()) {
+  case TargetCXXABI::GenericItanium:
+  case TargetCXXABI::GenericARM:
+  case TargetCXXABI::iOS:
     return createItaniumMangleContext(*this, getDiagnostics());
-  case CXXABI_Microsoft:
+  case TargetCXXABI::Microsoft:
     return createMicrosoftMangleContext(*this, getDiagnostics());
   }
   llvm_unreachable("Unsupported ABI");
diff --git a/lib/AST/RecordLayout.cpp b/lib/AST/RecordLayout.cpp
index 2ae0aab19f..f6cfe63cd3 100644
--- a/lib/AST/RecordLayout.cpp
+++ b/lib/AST/RecordLayout.cpp
@@ -75,10 +75,9 @@ ASTRecordLayout::ASTRecordLayout(const ASTContext &Ctx,
 #ifndef NDEBUG
     if (const CXXRecordDecl *PrimaryBase = getPrimaryBase()) {
       if (isPrimaryBaseVirtual()) {
-        // Microsoft ABI doesn't have primary virtual base
-        if (Ctx.getTargetInfo().getCXXABI() != CXXABI_Microsoft) {
-        assert(getVBaseClassOffset(PrimaryBase).isZero() &&
-               "Primary virtual base must be at offset 0!");
+        if (Ctx.getTargetInfo().getCXXABI().hasPrimaryVBases()) {
+          assert(getVBaseClassOffset(PrimaryBase).isZero() &&
+                 "Primary virtual base must be at offset 0!");
         }
       } else {
         assert(getBaseClassOffset(PrimaryBase).isZero() &&
diff --git a/lib/AST/RecordLayoutBuilder.cpp b/lib/AST/RecordLayoutBuilder.cpp
index 7f84c56d52..08f6d5c54b 100644
--- a/lib/AST/RecordLayoutBuilder.cpp
+++ b/lib/AST/RecordLayoutBuilder.cpp
@@ -676,8 +676,12 @@ protected:
                           bool FieldPacked, const FieldDecl *D);
   void LayoutBitField(const FieldDecl *D);
 
+  TargetCXXABI getCXXABI() const {
+    return Context.getTargetInfo().getCXXABI();
+  }
+
   bool isMicrosoftCXXABI() const {
-    return Context.getTargetInfo().getCXXABI() == CXXABI_Microsoft;
+    return getCXXABI().isMicrosoft();
   }
 
   void MSLayoutVirtualBases(const CXXRecordDecl *RD);
@@ -2606,7 +2610,7 @@ static void DumpCXXRecordLayout(raw_ostream &OS,
 
   // Vtable pointer.
   if (RD->isDynamicClass() && !PrimaryBase &&
-      C.getTargetInfo().getCXXABI() != CXXABI_Microsoft) {
+      !C.getTargetInfo().getCXXABI().isMicrosoft()) {
     PrintOffset(OS, Offset, IndentLevel);
     OS << '(' << *RD << " vtable pointer)\n";
   }
diff --git a/lib/AST/VTableBuilder.cpp b/lib/AST/VTableBuilder.cpp
index 00a186e9ee..5af3b65261 100644
--- a/lib/AST/VTableBuilder.cpp
+++ b/lib/AST/VTableBuilder.cpp
@@ -2197,7 +2197,8 @@ VTableLayout::~VTableLayout() { }
 
 VTableContext::VTableContext(ASTContext &Context)
   : Context(Context),
-  IsMicrosoftABI(Context.getTargetInfo().getCXXABI() == CXXABI_Microsoft) { }
+    IsMicrosoftABI(Context.getTargetInfo().getCXXABI().isMicrosoft()) {
+}
 
 VTableContext::~VTableContext() {
   llvm::DeleteContainerSeconds(VTableLayouts);