Golang Value.GlobalParent Examples

Example #1

File: typemap.go Project: minux/llgo

func (tm *TypeMap) interfaceFuncWrapper(f llvm.Value) llvm.Value {
	ftyp := f.Type().ElementType()
	paramTypes := ftyp.ParamTypes()
	recvType := paramTypes[0]
	paramTypes[0] = llvm.PointerType(llvm.Int8Type(), 0)
	newf := llvm.AddFunction(f.GlobalParent(), f.Name()+".ifn", llvm.FunctionType(
		ftyp.ReturnType(),
		paramTypes,
		ftyp.IsFunctionVarArg(),
	))

	b := llvm.GlobalContext().NewBuilder()
	defer b.Dispose()
	entry := llvm.AddBasicBlock(newf, "entry")
	b.SetInsertPointAtEnd(entry)
	args := make([]llvm.Value, len(paramTypes))
	for i := range paramTypes {
		args[i] = newf.Param(i)
	}

	recvBits := int(tm.target.TypeSizeInBits(recvType))
	if recvBits > 0 {
		args[0] = b.CreatePtrToInt(args[0], tm.target.IntPtrType(), "")
		if args[0].Type().IntTypeWidth() > recvBits {
			args[0] = b.CreateTrunc(args[0], llvm.IntType(recvBits), "")
		}
		args[0] = coerce(b, args[0], recvType)
	} else {
		args[0] = llvm.ConstNull(recvType)
	}

	result := b.CreateCall(f, args, "")
	if result.Type().TypeKind() == llvm.VoidTypeKind {
		b.CreateRetVoid()
	} else {
		b.CreateRet(result)
	}
	return newf
}