public bool VisitConstant(Constant constant)
{
ValueSource outputAllocation = GetTerminalValueSource(constant.OutputTerminal);
if (constant.DataType.IsInteger())
{
LLVMValueRef constantValueRef;
switch (constant.DataType.GetKind())
{
case NITypeKind.Int8:
constantValueRef = ((sbyte)constant.Value).AsLLVMValue();
break;
case NITypeKind.UInt8:
constantValueRef = ((byte)constant.Value).AsLLVMValue();
break;
case NITypeKind.Int16:
constantValueRef = ((short)constant.Value).AsLLVMValue();
break;
case NITypeKind.UInt16:
constantValueRef = ((ushort)constant.Value).AsLLVMValue();
break;
case NITypeKind.Int32:
constantValueRef = ((int)constant.Value).AsLLVMValue();
break;
case NITypeKind.UInt32:
constantValueRef = ((uint)constant.Value).AsLLVMValue();
break;
case NITypeKind.Int64:
constantValueRef = ((long)constant.Value).AsLLVMValue();
break;
case NITypeKind.UInt64:
constantValueRef = ((ulong)constant.Value).AsLLVMValue();
break;
default:
throw new NotSupportedException("Unsupported numeric constant type: " + constant.DataType);
}
outputAllocation.UpdateValue(_builder, constantValueRef);
}
else if (constant.Value is bool)
{
LLVMValueRef constantValueRef = ((bool)constant.Value).AsLLVMValue();
outputAllocation.UpdateValue(_builder, constantValueRef);
}
else if (constant.Value is string)
{
VariableReference output = constant.OutputTerminal.GetTrueVariable();
if (output.Type.IsRebarReferenceType() && output.Type.GetReferentType() == DataTypes.StringSliceType)
{
string stringValue = (string)constant.Value;
int length = Encoding.UTF8.GetByteCount(stringValue);
LLVMValueRef stringValueConstant = LLVMSharp.LLVM.ConstString(stringValue, (uint)length, true);
LLVMValueRef stringConstantPtr = Module.AddGlobal(stringValueConstant.TypeOf(), $"string{constant.UniqueId}");
stringConstantPtr.SetInitializer(stringValueConstant);
LLVMValueRef castPointer = _builder.CreateBitCast(
stringConstantPtr,
LLVMTypeRef.PointerType(LLVMTypeRef.Int8Type(), 0),
"ptrCast");
LLVMValueRef[] stringSliceFields = new LLVMValueRef[]
{
castPointer,
length.AsLLVMValue()
};
LLVMValueRef stringSliceValue = LLVMValueRef.ConstStruct(stringSliceFields, false);
outputAllocation.UpdateValue(_builder, stringSliceValue);
}
}
else
{
throw new NotImplementedException();
}
return(true);
}