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use crate::{
constant::Constant,
context::Context,
instruction::Instruction,
irtype::Type,
metadata::{combine, MetadataIndex},
};
#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
pub struct Value(pub generational_arena::Index);
#[doc(hidden)]
#[derive(Debug, Clone)]
pub struct ValueContent {
pub value: ValueDatum,
pub metadata: Option<MetadataIndex>,
}
#[doc(hidden)]
#[derive(Debug, Clone)]
pub enum ValueDatum {
Argument(Type),
Constant(Constant),
Instruction(Instruction),
}
impl Value {
pub fn new_argument(context: &mut Context, ty: Type) -> Value {
let content = ValueContent {
value: ValueDatum::Argument(ty),
metadata: None,
};
Value(context.values.insert(content))
}
pub fn new_constant(context: &mut Context, constant: Constant) -> Value {
let content = ValueContent {
value: ValueDatum::Constant(constant),
metadata: None,
};
Value(context.values.insert(content))
}
pub fn new_instruction(context: &mut Context, instruction: Instruction) -> Value {
let content = ValueContent {
value: ValueDatum::Instruction(instruction),
metadata: None,
};
Value(context.values.insert(content))
}
pub fn add_metadatum(self, context: &mut Context, md_idx: Option<MetadataIndex>) -> Self {
if md_idx.is_some() {
let orig_md = context.values[self.0].metadata;
let new_md = combine(context, &orig_md, &md_idx);
context.values[self.0].metadata = new_md;
}
self
}
pub fn get_metadata(&self, context: &Context) -> Option<MetadataIndex> {
context.values[self.0].metadata
}
pub fn is_constant(&self, context: &Context) -> bool {
matches!(context.values[self.0].value, ValueDatum::Constant(_))
}
pub fn is_terminator(&self, context: &Context) -> bool {
match &context.values[self.0].value {
ValueDatum::Instruction(ins) => matches!(
ins,
Instruction::Branch(_)
| Instruction::ConditionalBranch { .. }
| Instruction::Ret(_, _)
),
_ => false,
}
}
pub fn replace_instruction_value(&self, context: &mut Context, old_val: Value, new_val: Value) {
if let ValueDatum::Instruction(instruction) =
&mut context.values.get_mut(self.0).unwrap().value
{
instruction.replace_value(old_val, new_val);
}
}
pub fn get_type(&self, context: &Context) -> Option<Type> {
match &context.values[self.0].value {
ValueDatum::Argument(ty) => Some(*ty),
ValueDatum::Constant(c) => Some(c.ty),
ValueDatum::Instruction(ins) => ins.get_type(context),
}
}
}