Abstract out member-pointer creation. I'm really unhappy about the current
duplication between the constant and non-constant paths in all of this.
Implement ARM ABI semantics for member pointer constants and conversion.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111772 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGCXX.cpp b/lib/CodeGen/CGCXX.cpp
index f56ea42..2934657 100644
--- a/lib/CodeGen/CGCXX.cpp
+++ b/lib/CodeGen/CGCXX.cpp
@@ -287,44 +287,6 @@
return cast<llvm::Function>(GetOrCreateLLVMFunction(Name, FTy, GD));
}
-llvm::Constant *
-CodeGenModule::GetCXXMemberFunctionPointerValue(const CXXMethodDecl *MD) {
- assert(MD->isInstance() && "Member function must not be static!");
-
- MD = MD->getCanonicalDecl();
-
- const llvm::Type *PtrDiffTy = Types.ConvertType(Context.getPointerDiffType());
-
- // Get the function pointer (or index if this is a virtual function).
- if (MD->isVirtual()) {
- uint64_t Index = VTables.getMethodVTableIndex(MD);
-
- // FIXME: We shouldn't use / 8 here.
- uint64_t PointerWidthInBytes = Context.Target.getPointerWidth(0) / 8;
-
- // Itanium C++ ABI 2.3:
- // For a non-virtual function, this field is a simple function pointer.
- // For a virtual function, it is 1 plus the virtual table offset
- // (in bytes) of the function, represented as a ptrdiff_t.
- return llvm::ConstantInt::get(PtrDiffTy, (Index * PointerWidthInBytes) + 1);
- }
-
- const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>();
- const llvm::Type *Ty;
- // Check whether the function has a computable LLVM signature.
- if (!CodeGenTypes::VerifyFuncTypeComplete(FPT)) {
- // The function has a computable LLVM signature; use the correct type.
- Ty = Types.GetFunctionType(Types.getFunctionInfo(MD), FPT->isVariadic());
- } else {
- // Use an arbitrary non-function type to tell GetAddrOfFunction that the
- // function type is incomplete.
- Ty = PtrDiffTy;
- }
-
- llvm::Constant *FuncPtr = GetAddrOfFunction(MD, Ty);
- return llvm::ConstantExpr::getPtrToInt(FuncPtr, PtrDiffTy);
-}
-
static llvm::Value *BuildVirtualCall(CodeGenFunction &CGF, uint64_t VTableIndex,
llvm::Value *This, const llvm::Type *Ty) {
Ty = Ty->getPointerTo()->getPointerTo()->getPointerTo();
@@ -400,6 +362,13 @@
ErrorUnsupportedABI(CGF, "null member function pointers");
}
+void CGCXXABI::EmitMemberFunctionPointer(CodeGenFunction &CGF,
+ const CXXMethodDecl *MD,
+ llvm::Value *DestPtr,
+ bool VolatileDest) {
+ ErrorUnsupportedABI(CGF, "member function pointers");
+}
+
llvm::Constant *
CGCXXABI::EmitMemberFunctionPointerConversion(llvm::Constant *C,
const CastExpr *E) {
@@ -411,6 +380,10 @@
return 0;
}
+llvm::Constant *CGCXXABI::EmitMemberFunctionPointer(const CXXMethodDecl *MD) {
+ return 0;
+}
+
bool CGCXXABI::RequiresNonZeroInitializer(QualType T) {
return false;
}