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require fully typed integers for now

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Edgar 2023-06-11 12:07:15 +02:00
parent f3cc72e7ce
commit 8c212d948d
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8 changed files with 208 additions and 233 deletions
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0
example.ed → programs/example.ed
View file

15
programs/ifelse.ed Normal file
View file

@ -0,0 +1,15 @@
fn works(x: i64) -> i64 {
let z = 0i64;
if 2i64 == x {
z = x * 2i64;
} else {
z = x * 3i64;
}
return z;
}
fn main() -> i64 {
let y = 2i64;
let z = y;
return works(z);
}

2
simple.ed → programs/simple.ed
View file

@ -9,7 +9,7 @@ fn test(x: Hello) {
fn works(x: i64) -> i64 { fn works(x: i64) -> i64 {
let z = 0i64; let z = 0i64;
if 2 == x { if 2i64 == x {
z = x * 2i64; z = x * 2i64;
} else { } else {
z = x * 3i64; z = x * 3i64;

19
src/ast/mod.rs
View file

@ -1,3 +1,5 @@
use std::collections::HashMap;
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)] #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct Spanned<T> { pub struct Spanned<T> {
pub span: (usize, usize), pub span: (usize, usize),
@ -64,12 +66,10 @@ pub enum Expression {
Literal(LiteralValue), Literal(LiteralValue),
Variable { Variable {
name: Spanned<String>, name: Spanned<String>,
value_type: Option<TypeExp>,
}, },
Call { Call {
function: String, function: String,
args: Vec<Box<Self>>, args: Vec<Box<Self>>,
value_type: Option<TypeExp>,
}, },
BinaryOp(Box<Self>, OpCode, Box<Self>), BinaryOp(Box<Self>, OpCode, Box<Self>),
} }
@ -86,16 +86,17 @@ impl Parameter {
} }
} }
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)] #[derive(Debug, Clone, PartialEq)]
pub struct Function { pub struct Function {
pub name: String, pub name: String,
pub params: Vec<Parameter>, pub params: Vec<Parameter>,
pub body: Vec<Statement>, pub body: Vec<Statement>,
pub scope_type_info: HashMap<String, Vec<TypeExp>>,
pub return_type: Option<TypeExp>, pub return_type: Option<TypeExp>,
} }
impl Function { impl Function {
pub const fn new( pub fn new(
name: String, name: String,
params: Vec<Parameter>, params: Vec<Parameter>,
body: Vec<Statement>, body: Vec<Statement>,
@ -106,6 +107,7 @@ impl Function {
params, params,
body, body,
return_type, return_type,
scope_type_info: HashMap::new(),
} }
} }
} }
@ -113,14 +115,14 @@ impl Function {
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)] #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct StructField { pub struct StructField {
pub ident: String, pub ident: String,
pub type_exp: TypeExp, pub field_type: TypeExp,
} }
impl StructField { impl StructField {
pub const fn new(ident: String, type_name: TypeExp) -> Self { pub const fn new(ident: String, type_name: TypeExp) -> Self {
Self { Self {
ident, ident,
type_exp: type_name, field_type: type_name,
} }
} }
} }
@ -131,7 +133,7 @@ pub struct Struct {
pub fields: Vec<StructField>, pub fields: Vec<StructField>,
} }
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)] #[derive(Debug, Clone, PartialEq)]
pub enum Statement { pub enum Statement {
Let { Let {
name: String, name: String,
@ -142,13 +144,14 @@ pub enum Statement {
Mutate { Mutate {
name: String, name: String,
value: Box<Expression>, value: Box<Expression>,
value_type: Option<TypeExp>,
span: (usize, usize), span: (usize, usize),
}, },
If { If {
condition: Box<Expression>, condition: Box<Expression>,
body: Vec<Statement>, body: Vec<Statement>,
scope_type_info: HashMap<String, Vec<TypeExp>>,
else_body: Option<Vec<Statement>>, else_body: Option<Vec<Statement>>,
else_body_scope_type_info: HashMap<String, Vec<TypeExp>>,
}, },
Return(Option<Box<Expression>>), Return(Option<Box<Expression>>),
Function(Function), Function(Function),

217
src/codegen.rs
View file

@ -37,10 +37,10 @@ pub struct CodeGen<'ctx> {
context: &'ctx Context, context: &'ctx Context,
pub module: Module<'ctx>, pub module: Module<'ctx>,
builder: Builder<'ctx>, builder: Builder<'ctx>,
types: TypeStorage<'ctx>, //types: TypeStorage<'ctx>,
struct_types: StructTypeStorage<'ctx>, struct_types: StructTypeStorage<'ctx>,
// function to return type // function to return type
functions: HashMap<String, (Vec<TypeExp>, Option<TypeExp>)>, functions: HashMap<String, Function>,
_program: ProgramData, _program: ProgramData,
ast: ast::Program, ast: ast::Program,
} }
@ -48,12 +48,12 @@ pub struct CodeGen<'ctx> {
#[derive(Debug, Clone, PartialEq, Eq)] #[derive(Debug, Clone, PartialEq, Eq)]
pub struct Variable<'ctx> { pub struct Variable<'ctx> {
pub value: BasicValueEnum<'ctx>, pub value: BasicValueEnum<'ctx>,
pub type_counter: usize,
pub phi_counter: usize, pub phi_counter: usize,
pub type_exp: TypeExp,
} }
pub type Variables<'ctx> = HashMap<String, Variable<'ctx>>; pub type Variables<'ctx> = HashMap<String, Variable<'ctx>>;
pub type TypeStorage<'ctx> = HashMap<TypeExp, BasicTypeEnum<'ctx>>; // pub type TypeStorage<'ctx> = HashMap<TypeExp, BasicTypeEnum<'ctx>>;
/// Holds the struct type and maps fields to types and the location within the struct. /// Holds the struct type and maps fields to types and the location within the struct.
#[derive(Debug, Clone, PartialEq, Eq)] #[derive(Debug, Clone, PartialEq, Eq)]
@ -79,7 +79,6 @@ impl<'ctx> CodeGen<'ctx> {
builder: context.create_builder(), builder: context.create_builder(),
_program, _program,
ast, ast,
types: HashMap::new(),
struct_types: HashMap::new(), struct_types: HashMap::new(),
functions: HashMap::new(), functions: HashMap::new(),
}; };
@ -88,9 +87,8 @@ impl<'ctx> CodeGen<'ctx> {
} }
pub fn compile_ast(&mut self) -> Result<()> { pub fn compile_ast(&mut self) -> Result<()> {
let mut functions = vec![]; let mut functions = HashMap::new();
let mut func_info = HashMap::new(); // let mut types: TypeStorage<'ctx> = HashMap::new();
let mut types: TypeStorage<'ctx> = HashMap::new();
let mut struct_types: StructTypeStorage<'ctx> = HashMap::new(); let mut struct_types: StructTypeStorage<'ctx> = HashMap::new();
// todo fix the grammar so top level statements are only functions and static vars. // todo fix the grammar so top level statements are only functions and static vars.
@ -102,13 +100,11 @@ impl<'ctx> CodeGen<'ctx> {
let mut field_types = vec![]; let mut field_types = vec![];
for (i, field) in s.fields.iter().enumerate() { for (i, field) in s.fields.iter().enumerate() {
if !types.contains_key(&field.type_exp) { // todo: this doesnt handle out of order structs well
types.insert(field.type_exp.clone(), self.get_llvm_type(&field.type_exp)?); let ty = self.get_llvm_type(&field.field_type)?;
}
let ty = self.get_llvm_type(&field.type_exp)?;
field_types.push(ty); field_types.push(ty);
// todo: ensure alignment and padding here // todo: ensure alignment and padding here
fields.insert(field.ident.clone(), (i, field.type_exp.clone())); fields.insert(field.ident.clone(), (i, field.field_type.clone()));
} }
let ty = self.context.struct_type(&field_types, false); let ty = self.context.struct_type(&field_types, false);
@ -123,38 +119,16 @@ impl<'ctx> CodeGen<'ctx> {
// create the llvm functions first. // create the llvm functions first.
for statement in &self.ast.statements { for statement in &self.ast.statements {
if let Statement::Function(function) = &statement { if let Statement::Function(function) = &statement {
functions.push(function); functions.insert(function.name.clone(), function.clone());
let (args, ret_type) = self.compile_function_signature(function)?; self.compile_function_signature(function)?;
let mut arg_types = vec![];
for arg in args {
if !types.contains_key(&arg) {
let ty = self.get_llvm_type(&arg)?;
types.insert(arg.clone(), ty);
}
arg_types.push(arg);
}
if let Some(ret_type) = ret_type {
let ret_type = if !types.contains_key(&ret_type) {
let ty = self.get_llvm_type(&ret_type)?;
types.insert(ret_type.clone(), ty);
ret_type
} else {
ret_type
};
func_info.insert(function.name.clone(), (arg_types, Some(ret_type)));
} else {
func_info.insert(function.name.clone(), (arg_types, None));
} }
} }
} self.functions = functions;
self.types = types;
self.functions = func_info;
info!("functions:\n{:#?}", self.functions); info!("functions:\n{:#?}", self.functions);
// implement them. // implement them.
for function in functions { for (_, function) in &self.functions {
self.compile_function(function)?; self.compile_function(function)?;
} }
@ -169,9 +143,6 @@ impl<'ctx> CodeGen<'ctx> {
} }
fn get_llvm_type(&self, id: &TypeExp) -> Result<BasicTypeEnum<'ctx>> { fn get_llvm_type(&self, id: &TypeExp) -> Result<BasicTypeEnum<'ctx>> {
if let Some(ty) = self.types.get(id) {
Ok(*ty)
} else {
Ok(match id { Ok(match id {
TypeExp::Integer { bits, signed: _ } => self TypeExp::Integer { bits, signed: _ } => self
.context .context
@ -194,13 +165,9 @@ impl<'ctx> CodeGen<'ctx> {
.as_basic_type_enum(), .as_basic_type_enum(),
}) })
} }
}
/// creates the llvm function without the body, so other function bodies can call it. /// creates the llvm function without the body, so other function bodies can call it.
fn compile_function_signature( fn compile_function_signature(&self, function: &Function) -> Result<()> {
&self,
function: &Function,
) -> Result<(Vec<TypeExp>, Option<TypeExp>)> {
let args_types: Vec<BasicTypeEnum<'ctx>> = function let args_types: Vec<BasicTypeEnum<'ctx>> = function
.params .params
.iter() .iter()
@ -221,14 +188,7 @@ impl<'ctx> CodeGen<'ctx> {
self.module.add_function(&function.name, fn_type, None); self.module.add_function(&function.name, fn_type, None);
Ok(( Ok(())
function
.params
.iter()
.map(|param| param.type_exp.clone())
.collect(),
ret_type,
))
} }
fn compile_function(&self, function: &Function) -> Result<()> { fn compile_function(&self, function: &Function) -> Result<()> {
@ -238,7 +198,6 @@ impl<'ctx> CodeGen<'ctx> {
self.builder.position_at_end(entry_block); self.builder.position_at_end(entry_block);
let mut variables: Variables = HashMap::new(); let mut variables: Variables = HashMap::new();
let mut types: TypeStorage = self.types.clone();
for (i, param) in function.params.iter().enumerate() { for (i, param) in function.params.iter().enumerate() {
let id = &param.ident; let id = &param.ident;
@ -250,7 +209,7 @@ impl<'ctx> CodeGen<'ctx> {
Variable { Variable {
value: param_value, value: param_value,
phi_counter: 0, phi_counter: 0,
type_exp: param.type_exp.clone(), type_counter: 0,
}, },
); );
} }
@ -261,7 +220,7 @@ impl<'ctx> CodeGen<'ctx> {
if let Statement::Return(_) = statement { if let Statement::Return(_) = statement {
has_return = true has_return = true
} }
self.compile_statement(func, statement, &mut variables, &mut types)?; self.compile_statement(func, statement, &mut variables, &function.scope_type_info)?;
} }
if !has_return { if !has_return {
@ -277,7 +236,7 @@ impl<'ctx> CodeGen<'ctx> {
statement: &Statement, statement: &Statement,
// value, assignments // value, assignments
variables: &mut Variables<'ctx>, variables: &mut Variables<'ctx>,
types: &mut TypeStorage<'ctx>, scope_info: &HashMap<String, Vec<TypeExp>>,
) -> Result<()> { ) -> Result<()> {
match statement { match statement {
// Variable assignment // Variable assignment
@ -287,41 +246,32 @@ impl<'ctx> CodeGen<'ctx> {
value_type: _, value_type: _,
.. ..
} => { } => {
let (value, value_type) = self let value = self
.compile_expression(value, variables, types)? .compile_expression(value, variables, scope_info)?
.expect("should have result"); .expect("should have result");
if !types.contains_key(&value_type) {
let ty = self.get_llvm_type(&value_type)?;
types.insert(value_type.clone(), ty);
}
info!("adding variable: name={}, ty={:?}", name, value_type);
variables.insert( variables.insert(
name.clone(), name.clone(),
Variable { Variable {
value, value,
phi_counter: 0, phi_counter: 0,
type_exp: value_type, type_counter: 0,
}, },
); );
} }
Statement::Mutate { name, value, .. } => { Statement::Mutate { name, value, .. } => {
let (value, value_type) = self let value = self
.compile_expression(value, variables, types)? .compile_expression(value, variables, scope_info)?
.expect("should have result"); .expect("should have result");
let var = variables.get_mut(name).expect("variable should exist"); let var = variables.get_mut(name).expect("variable should exist");
var.phi_counter += 1; var.phi_counter += 1;
var.value = value; var.value = value;
assert_eq!(var.type_exp, value_type, "variable type shouldn't change!");
info!("mutated variable: name={}, ty={:?}", name, var.type_exp);
} }
Statement::Return(ret) => { Statement::Return(ret) => {
if let Some(ret) = ret { if let Some(ret) = ret {
let (value, _value_type) = self let value = self
.compile_expression(ret, variables, types)? .compile_expression(ret, variables, scope_info)?
.expect("should have result"); .expect("should have result");
self.builder.build_return(Some(&value)); self.builder.build_return(Some(&value));
} else { } else {
@ -332,9 +282,11 @@ impl<'ctx> CodeGen<'ctx> {
condition, condition,
body, body,
else_body, else_body,
scope_type_info,
else_body_scope_type_info,
} => { } => {
let (condition, _cond_type) = self let condition = self
.compile_expression(condition, variables, types)? .compile_expression(condition, variables, scope_info)?
.expect("should produce a value"); .expect("should produce a value");
let mut if_block = self.context.append_basic_block(function_value, "if"); let mut if_block = self.context.append_basic_block(function_value, "if");
@ -354,7 +306,7 @@ impl<'ctx> CodeGen<'ctx> {
let mut variables_if = variables.clone(); let mut variables_if = variables.clone();
self.builder.position_at_end(if_block); self.builder.position_at_end(if_block);
for s in body { for s in body {
self.compile_statement(function_value, s, &mut variables_if, types)?; self.compile_statement(function_value, s, &mut variables_if, scope_type_info)?;
} }
self.builder.build_unconditional_branch(merge_block); self.builder.build_unconditional_branch(merge_block);
if_block = self.builder.get_insert_block().unwrap(); // update for phi if_block = self.builder.get_insert_block().unwrap(); // update for phi
@ -364,7 +316,12 @@ impl<'ctx> CodeGen<'ctx> {
self.builder.position_at_end(else_block); self.builder.position_at_end(else_block);
for s in else_body { for s in else_body {
self.compile_statement(function_value, s, &mut variables_else, types)?; self.compile_statement(
function_value,
s,
&mut variables_else,
else_body_scope_type_info,
)?;
} }
self.builder.build_unconditional_branch(merge_block); self.builder.build_unconditional_branch(merge_block);
else_block = self.builder.get_insert_block().unwrap(); // update for phi else_block = self.builder.get_insert_block().unwrap(); // update for phi
@ -381,7 +338,7 @@ impl<'ctx> CodeGen<'ctx> {
.builder .builder
.build_phi(old_var.value.get_type(), &format!("{name}_phi")); .build_phi(old_var.value.get_type(), &format!("{name}_phi"));
phi.add_incoming(&[(&new_var.value, if_block)]); phi.add_incoming(&[(&new_var.value, if_block)]);
processed_vars.insert(name, (phi, new_var.type_exp)); processed_vars.insert(name, phi);
} }
} }
} }
@ -391,7 +348,7 @@ impl<'ctx> CodeGen<'ctx> {
if variables.contains_key(&name) { if variables.contains_key(&name) {
let old_var = variables.get(&name).unwrap(); let old_var = variables.get(&name).unwrap();
if new_var.phi_counter > old_var.phi_counter { if new_var.phi_counter > old_var.phi_counter {
if let Some((phi, _)) = processed_vars.get(&name) { if let Some(phi) = processed_vars.get(&name) {
phi.add_incoming(&[(&new_var.value, else_block)]); phi.add_incoming(&[(&new_var.value, else_block)]);
} else { } else {
let phi = self.builder.build_phi( let phi = self.builder.build_phi(
@ -399,22 +356,25 @@ impl<'ctx> CodeGen<'ctx> {
&format!("{name}_phi"), &format!("{name}_phi"),
); );
phi.add_incoming(&[(&old_var.value, else_block)]); phi.add_incoming(&[(&old_var.value, else_block)]);
processed_vars.insert(name, (phi, new_var.type_exp)); processed_vars.insert(name, phi);
} }
} }
} }
} }
} }
for (name, (phi, type_exp)) in processed_vars { for (name, phi) in processed_vars {
/*
variables.insert( variables.insert(
name, name,
Variable { Variable {
value: phi.as_basic_value(), value: phi.as_basic_value(),
phi_counter: 0, phi_counter: 0,
type_exp,
}, },
); );
*/
let mut var = variables.get_mut(&name).unwrap();
var.value = phi.as_basic_value();
} }
} }
Statement::Function(_) => unreachable!(), Statement::Function(_) => unreachable!(),
@ -428,21 +388,16 @@ impl<'ctx> CodeGen<'ctx> {
&self, &self,
expr: &Expression, expr: &Expression,
variables: &mut Variables<'ctx>, variables: &mut Variables<'ctx>,
types: &mut TypeStorage<'ctx>, scope_info: &HashMap<String, Vec<TypeExp>>,
) -> Result<Option<(BasicValueEnum<'ctx>, TypeExp)>> { ) -> Result<Option<BasicValueEnum<'ctx>>> {
Ok(match expr { Ok(match expr {
Expression::Variable { Expression::Variable { name } => Some(self.compile_variable(&name.value, variables)?),
name,
value_type: _,
} => Some(self.compile_variable(&name.value, variables)?),
Expression::Literal(term) => Some(self.compile_literal(term)?), Expression::Literal(term) => Some(self.compile_literal(term)?),
Expression::Call { Expression::Call { function, args } => {
function, self.compile_call(function, args, variables, scope_info)?
args, }
value_type,
} => self.compile_call(function, args, variables, types, value_type.clone())?,
Expression::BinaryOp(lhs, op, rhs) => { Expression::BinaryOp(lhs, op, rhs) => {
Some(self.compile_binary_op(lhs, op, rhs, variables, types)?) Some(self.compile_binary_op(lhs, op, rhs, variables, scope_info)?)
} }
}) })
} }
@ -452,17 +407,16 @@ impl<'ctx> CodeGen<'ctx> {
func_name: &str, func_name: &str,
args: &[Box<Expression>], args: &[Box<Expression>],
variables: &mut Variables<'ctx>, variables: &mut Variables<'ctx>,
types: &mut TypeStorage<'ctx>, scope_info: &HashMap<String, Vec<TypeExp>>,
value_type: Option<TypeExp>, ) -> Result<Option<BasicValueEnum<'ctx>>> {
) -> Result<Option<(BasicValueEnum<'ctx>, TypeExp)>> {
info!("compiling fn call: func_name={}", func_name); info!("compiling fn call: func_name={}", func_name);
let function = self.module.get_function(func_name).expect("should exist"); let function = self.module.get_function(func_name).expect("should exist");
let mut value_args: Vec<BasicMetadataValueEnum> = Vec::with_capacity(args.len()); let mut value_args: Vec<BasicMetadataValueEnum> = Vec::with_capacity(args.len());
for arg in args.iter() { for arg in args.iter() {
let (res, _res_type) = self let res = self
.compile_expression(arg, variables, types)? .compile_expression(arg, variables, scope_info)?
.expect("should have result"); .expect("should have result");
value_args.push(res.into()); value_args.push(res.into());
} }
@ -473,7 +427,7 @@ impl<'ctx> CodeGen<'ctx> {
.try_as_basic_value(); .try_as_basic_value();
Ok(match result { Ok(match result {
Either::Left(val) => Some((val, value_type.unwrap())), Either::Left(val) => Some(val),
Either::Right(_) => None, Either::Right(_) => None,
}) })
} }
@ -484,20 +438,18 @@ impl<'ctx> CodeGen<'ctx> {
op: &OpCode, op: &OpCode,
rhs: &Expression, rhs: &Expression,
variables: &mut Variables<'ctx>, variables: &mut Variables<'ctx>,
types: &mut TypeStorage<'ctx>, scope_info: &HashMap<String, Vec<TypeExp>>,
) -> Result<(BasicValueEnum<'ctx>, TypeExp)> { ) -> Result<BasicValueEnum<'ctx>> {
let (lhs, lhs_type) = self let lhs = self
.compile_expression(lhs, variables, types)? .compile_expression(lhs, variables, scope_info)?
.expect("should have result"); .expect("should have result");
let (rhs, rhs_type) = self let rhs = self
.compile_expression(rhs, variables, types)? .compile_expression(rhs, variables, scope_info)?
.expect("should have result"); .expect("should have result");
assert_eq!(lhs_type, rhs_type);
let lhs = lhs.into_int_value(); let lhs = lhs.into_int_value();
let rhs = rhs.into_int_value(); let rhs = rhs.into_int_value();
let mut bool_result = false;
let result = match op { let result = match op {
OpCode::Add => self.builder.build_int_add(lhs, rhs, "add"), OpCode::Add => self.builder.build_int_add(lhs, rhs, "add"),
OpCode::Sub => self.builder.build_int_sub(lhs, rhs, "sub"), OpCode::Sub => self.builder.build_int_sub(lhs, rhs, "sub"),
@ -506,31 +458,18 @@ impl<'ctx> CodeGen<'ctx> {
OpCode::Rem => self.builder.build_int_signed_rem(lhs, rhs, "rem"), OpCode::Rem => self.builder.build_int_signed_rem(lhs, rhs, "rem"),
OpCode::And => self.builder.build_and(lhs, rhs, "and"), OpCode::And => self.builder.build_and(lhs, rhs, "and"),
OpCode::Or => self.builder.build_or(lhs, rhs, "or"), OpCode::Or => self.builder.build_or(lhs, rhs, "or"),
OpCode::Eq => { OpCode::Eq => self
bool_result = true; .builder
self.builder .build_int_compare(IntPredicate::EQ, lhs, rhs, "eq"),
.build_int_compare(IntPredicate::EQ, lhs, rhs, "eq") OpCode::Ne => self
} .builder
OpCode::Ne => { .build_int_compare(IntPredicate::NE, lhs, rhs, "eq"),
bool_result = true;
self.builder
.build_int_compare(IntPredicate::NE, lhs, rhs, "eq")
}
}; };
let mut res_type = lhs_type; Ok(result.as_basic_value_enum())
if bool_result {
res_type = TypeExp::Integer {
bits: 1,
signed: false,
};
} }
Ok((result.as_basic_value_enum(), res_type)) pub fn compile_literal(&self, term: &LiteralValue) -> Result<BasicValueEnum<'ctx>> {
}
pub fn compile_literal(&self, term: &LiteralValue) -> Result<(BasicValueEnum<'ctx>, TypeExp)> {
let value = match term { let value = match term {
LiteralValue::String(_s) => { LiteralValue::String(_s) => {
todo!() todo!()
@ -540,13 +479,11 @@ impl<'ctx> CodeGen<'ctx> {
.const_string(s.as_bytes(), true) .const_string(s.as_bytes(), true)
.as_basic_value_enum() */ .as_basic_value_enum() */
} }
LiteralValue::Boolean(v) => ( LiteralValue::Boolean(v) => self
self.context .context
.bool_type() .bool_type()
.const_int((*v).into(), false) .const_int((*v).into(), false)
.as_basic_value_enum(), .as_basic_value_enum(),
TypeExp::Boolean,
),
LiteralValue::Integer { LiteralValue::Integer {
value, value,
bits, bits,
@ -554,13 +491,11 @@ impl<'ctx> CodeGen<'ctx> {
} => { } => {
let bits = *bits; let bits = *bits;
let signed = *signed; let signed = *signed;
(
self.context self.context
.custom_width_int_type(bits) .custom_width_int_type(bits)
.const_int(value.parse().unwrap(), false) .const_int(value.parse().unwrap(), false)
.as_basic_value_enum(), .as_basic_value_enum()
TypeExp::Integer { bits, signed },
)
} }
}; };
@ -571,8 +506,8 @@ impl<'ctx> CodeGen<'ctx> {
&self, &self,
variable: &str, variable: &str,
variables: &mut Variables<'ctx>, variables: &mut Variables<'ctx>,
) -> Result<(BasicValueEnum<'ctx>, TypeExp)> { ) -> Result<BasicValueEnum<'ctx>> {
let var = variables.get(variable).expect("value").clone(); let var = variables.get(variable).expect("value").clone();
Ok((var.value, var.type_exp)) Ok(var.value)
} }
} }

17
src/grammar.lalrpop
View file

@ -1,4 +1,4 @@
use std::str::FromStr; use std::collections::HashMap;
use crate::{ use crate::{
ast::{self, Spanned}, ast::{self, Spanned},
tokens::Token, tokens::Token,
@ -99,9 +99,15 @@ BasicStatement: ast::Statement = {
<lo:@L> "let" <i:"identifier"> <t:TypeInfo?> "=" <e:Expr> ";" <hi:@R> => <lo:@L> "let" <i:"identifier"> <t:TypeInfo?> "=" <e:Expr> ";" <hi:@R> =>
ast::Statement::Let { name: i, value: e, value_type: t, span: (lo, hi) }, ast::Statement::Let { name: i, value: e, value_type: t, span: (lo, hi) },
<lo:@L> <i:"identifier"> "=" <e:Expr> ";" <hi:@R> => <lo:@L> <i:"identifier"> "=" <e:Expr> ";" <hi:@R> =>
ast::Statement::Mutate { name: i, value: e, span: (lo, hi), value_type: None }, ast::Statement::Mutate { name: i, value: e, span: (lo, hi) },
"if" <cond:Expr> "{" <s:Statements> "}" <e:ElseExpr?> => "if" <cond:Expr> "{" <s:Statements> "}" <e:ElseExpr?> =>
ast::Statement::If { condition: cond, body: s, else_body: e}, ast::Statement::If {
condition: cond,
body: s,
else_body: e,
scope_type_info: Default::default(),
else_body_scope_type_info: Default::default(),
},
"return" <e:Expr?> ";" => ast::Statement::Return(e), "return" <e:Expr?> ";" => ast::Statement::Return(e),
}; };
@ -143,13 +149,12 @@ Expr4 = Tier<Level3_Op, Term>;
// Terms: variables, literals, calls // Terms: variables, literals, calls
Term: Box<ast::Expression> = { Term: Box<ast::Expression> = {
<lo:@L> <i:"identifier"> <hi:@R> => Box::new(ast::Expression::Variable { <lo:@L> <i:"identifier"> <hi:@R> => Box::new(ast::Expression::Variable {
name: Spanned::new(i, (lo, hi)), name: Spanned::new(i, (lo, hi))
value_type: None
}), }),
<n:Number> => Box::new(ast::Expression::Literal(n)), <n:Number> => Box::new(ast::Expression::Literal(n)),
<n:StringLit> => Box::new(ast::Expression::Literal(n)), <n:StringLit> => Box::new(ast::Expression::Literal(n)),
<n:BoolLiteral> => Box::new(ast::Expression::Literal(n)), <n:BoolLiteral> => Box::new(ast::Expression::Literal(n)),
<i:"identifier"> "(" <values:Comma<Term>> ")" => Box::new(ast::Expression::Call { function: i, args: values, value_type: None }), <i:"identifier"> "(" <values:Comma<Term>> ")" => Box::new(ast::Expression::Call { function: i, args: values }),
"(" <Term> ")" "(" <Term> ")"
}; };

6
src/main.rs
View file

@ -102,7 +102,7 @@ fn main() -> Result<()> {
let lexer = Lexer::new(code.as_str()); let lexer = Lexer::new(code.as_str());
let parser = grammar::ProgramParser::new(); let parser = grammar::ProgramParser::new();
let mut ast = parser.parse(lexer)?; let mut ast = parser.parse(lexer)?;
type_analysis::type_inference2(&mut ast); type_analysis::type_inference(&mut ast);
let program = ProgramData::new(&input, &code); let program = ProgramData::new(&input, &code);
check_program(&program, &ast); check_program(&program, &ast);
} }
@ -112,7 +112,7 @@ fn main() -> Result<()> {
let parser = grammar::ProgramParser::new(); let parser = grammar::ProgramParser::new();
match parser.parse(lexer) { match parser.parse(lexer) {
Ok(mut ast) => { Ok(mut ast) => {
type_analysis::type_inference2(&mut ast); type_analysis::type_inference(&mut ast);
println!("{ast:#?}"); println!("{ast:#?}");
} }
Err(e) => { Err(e) => {
@ -130,7 +130,7 @@ fn main() -> Result<()> {
let lexer = Lexer::new(code.as_str()); let lexer = Lexer::new(code.as_str());
let parser = grammar::ProgramParser::new(); let parser = grammar::ProgramParser::new();
let mut ast: Program = parser.parse(lexer)?; let mut ast: Program = parser.parse(lexer)?;
type_analysis::type_inference2(&mut ast); type_analysis::type_inference(&mut ast);
let program = ProgramData::new(&input, &code); let program = ProgramData::new(&input, &code);

105
src/type_analysis.rs
View file

@ -8,19 +8,15 @@ struct Storage {
functions: HashMap<String, Function>, functions: HashMap<String, Function>,
} }
/* // problem with scopes,
To briefly summarize the union-find algorithm, given the set of all types in a proof, // let x = 2;
it allows one to group them together into equivalence classes by means of a union procedure and to // let x = 2i64;
pick a representative for each such class using a find procedure. Emphasizing the word procedure in
the sense of side effect, we're clearly leaving the realm of logic in order to prepare an effective algorithm. type ScopeMap = HashMap<String, Vec<Option<TypeExp>>>;
The representative of a u n i o n ( a , b ) {\mathtt {union}}(a,b) is determined such that, if both a and b are
type variables then the representative is arbitrarily one of them, but while uniting a variable and a term, the
term becomes the representative. Assuming an implementation of union-find at hand, one can formulate the unification of two monotypes as follows:
*/
// this works, but need to find a way to store the found info + handle literal integer types (or not?) // this works, but need to find a way to store the found info + handle literal integer types (or not?)
// maybe use scope ids // maybe use scope ids
pub fn type_inference2(ast: &mut ast::Program) { pub fn type_inference(ast: &mut ast::Program) {
let mut storage = Storage::default(); let mut storage = Storage::default();
// gather global constructs first // gather global constructs first
@ -30,7 +26,7 @@ pub fn type_inference2(ast: &mut ast::Program) {
let fields = st let fields = st
.fields .fields
.iter() .iter()
.map(|x| (x.ident.clone(), x.type_exp.clone())) .map(|x| (x.ident.clone(), x.field_type.clone()))
.collect(); .collect();
storage.structs.insert(st.name.clone(), fields); storage.structs.insert(st.name.clone(), fields);
} }
@ -46,26 +42,33 @@ pub fn type_inference2(ast: &mut ast::Program) {
dbg!(&storage); dbg!(&storage);
for function in storage.functions.values() { for statement in ast.statements.iter_mut() {
let mut scope_vars: HashMap<String, Option<TypeExp>> = HashMap::new(); if let Statement::Function(function) = statement {
let mut scope_vars: ScopeMap = HashMap::new();
for arg in &function.params { for arg in &function.params {
scope_vars.insert(arg.ident.clone(), Some(arg.type_exp.clone())); scope_vars.insert(arg.ident.clone(), vec![Some(arg.type_exp.clone())]);
} }
let func_info = function.clone();
let (new_scope_vars, _) = let (new_scope_vars, _) =
type_inference_scope(&function.body, &scope_vars, function, &storage); type_inference_scope(&mut function.body, &scope_vars, &func_info, &storage);
dbg!(new_scope_vars); // todo: check all vars have type info?
function.scope_type_info = new_scope_vars
.into_iter()
.map(|(a, b)| (a, b.into_iter().map(Option::unwrap).collect()))
.collect();
}
} }
} }
/// Finds variable types in the scope, returns newly created variables to handle shadowing /// Finds variable types in the scope, returns newly created variables to handle shadowing
fn type_inference_scope( fn type_inference_scope(
statements: &[ast::Statement], statements: &mut [ast::Statement],
scope_vars: &HashMap<String, Option<TypeExp>>, scope_vars: &ScopeMap,
func: &Function, func: &Function,
storage: &Storage, storage: &Storage,
) -> (HashMap<String, Option<TypeExp>>, HashSet<String>) { ) -> (ScopeMap, HashSet<String>) {
let mut scope_vars = scope_vars.clone(); let mut scope_vars = scope_vars.clone();
let mut new_vars: HashSet<String> = HashSet::new(); let mut new_vars: HashSet<String> = HashSet::new();
@ -81,19 +84,24 @@ fn type_inference_scope(
let exp_type = type_inference_expression(value, &mut scope_vars, storage, None); let exp_type = type_inference_expression(value, &mut scope_vars, storage, None);
if !scope_vars.contains_key(name) {
scope_vars.insert(name.clone(), vec![]);
}
let var = scope_vars.get_mut(name).unwrap();
if value_type.is_none() { if value_type.is_none() {
scope_vars.insert(name.clone(), exp_type); var.push(exp_type);
} else { } else {
if exp_type.is_some() && &exp_type != value_type { if exp_type.is_some() && &exp_type != value_type {
panic!("let type mismatch: {:?} != {:?}", value_type, exp_type); panic!("let type mismatch: {:?} != {:?}", value_type, exp_type);
} }
scope_vars.insert(name.clone(), value_type.clone()); var.push(value_type.clone());
} }
} }
Statement::Mutate { Statement::Mutate {
name, name,
value, value,
value_type: _,
span: _, span: _,
} => { } => {
if !scope_vars.contains_key(name) { if !scope_vars.contains_key(name) {
@ -101,7 +109,7 @@ fn type_inference_scope(
} }
let exp_type = type_inference_expression(value, &mut scope_vars, storage, None); let exp_type = type_inference_expression(value, &mut scope_vars, storage, None);
let var = scope_vars.get_mut(name).unwrap(); let var = scope_vars.get_mut(name).unwrap().last_mut().unwrap();
if var.is_none() { if var.is_none() {
*var = exp_type; *var = exp_type;
@ -113,6 +121,8 @@ fn type_inference_scope(
condition, condition,
body, body,
else_body, else_body,
scope_type_info,
else_body_scope_type_info,
} => { } => {
type_inference_expression( type_inference_expression(
condition, condition,
@ -124,23 +134,33 @@ fn type_inference_scope(
let (new_scope_vars, new_vars) = let (new_scope_vars, new_vars) =
type_inference_scope(body, &scope_vars, func, storage); type_inference_scope(body, &scope_vars, func, storage);
for (k, v) in new_scope_vars.into_iter() { for (k, v) in new_scope_vars.iter() {
// not a new var within the scope (shadowing), so type info is valid // not a new var within the scope (shadowing), so type info is valid
if scope_vars.contains_key(&k) && !new_vars.contains(&k) { if scope_vars.contains_key(k) && !new_vars.contains(k) {
scope_vars.insert(k, v); scope_vars.insert(k.clone(), v.clone());
} }
} }
*scope_type_info = new_scope_vars
.into_iter()
.map(|(a, b)| (a, b.into_iter().map(Option::unwrap).collect()))
.collect();
if let Some(body) = else_body { if let Some(body) = else_body {
let (new_scope_vars, new_vars) = let (new_scope_vars, new_vars) =
type_inference_scope(body, &scope_vars, func, storage); type_inference_scope(body, &scope_vars, func, storage);
for (k, v) in new_scope_vars.into_iter() { for (k, v) in new_scope_vars.iter() {
// not a new var within the scope (shadowing), so type info is valid // not a new var within the scope (shadowing), so type info is valid
if scope_vars.contains_key(&k) && !new_vars.contains(&k) { if scope_vars.contains_key(k) && !new_vars.contains(k) {
scope_vars.insert(k, v); scope_vars.insert(k.clone(), v.clone());
} }
} }
*else_body_scope_type_info = new_scope_vars
.into_iter()
.map(|(a, b)| (a, b.into_iter().map(Option::unwrap).collect()))
.collect();
} }
} }
Statement::Return(exp) => { Statement::Return(exp) => {
@ -163,7 +183,7 @@ fn type_inference_scope(
fn type_inference_expression( fn type_inference_expression(
exp: &Expression, exp: &Expression,
scope_vars: &mut HashMap<String, Option<TypeExp>>, scope_vars: &mut ScopeMap,
storage: &Storage, storage: &Storage,
expected_type: Option<TypeExp>, expected_type: Option<TypeExp>,
) -> Option<TypeExp> { ) -> Option<TypeExp> {
@ -182,31 +202,28 @@ fn type_inference_expression(
ast::LiteralValue::Boolean(_) => Some(TypeExp::Boolean), ast::LiteralValue::Boolean(_) => Some(TypeExp::Boolean),
} }
} }
Expression::Variable { Expression::Variable { name } => {
name, let var = scope_vars
value_type: _, .get_mut(&name.value)
} => { .expect("to exist")
let var = scope_vars.get(&name.value).cloned().flatten(); .last_mut()
.unwrap();
if expected_type.is_some() { if expected_type.is_some() {
if var.is_none() { if var.is_none() {
scope_vars.insert(name.value.clone(), expected_type.clone()); *var = expected_type.clone();
expected_type expected_type
} else if expected_type.is_some() { } else if expected_type.is_some() {
assert_eq!(var, expected_type, "type mismatch with variables"); assert_eq!(*var, expected_type, "type mismatch with variables");
expected_type expected_type
} else { } else {
var var.clone()
} }
} else { } else {
var var.clone()
} }
} }
Expression::Call { Expression::Call { function, args } => {
function,
args,
value_type: _,
} => {
let func = storage.functions.get(function).cloned().unwrap(); let func = storage.functions.get(function).cloned().unwrap();
for (i, arg) in args.iter().enumerate() { for (i, arg) in args.iter().enumerate() {