use std::{collections::HashMap, convert::TryInto, iter::once}; use crate::{ codegen::{ concrete_type::{ConcreteFuncArg, ConcreteTypeEnum, ConcreteTypeStore}, get_llvm_type, CodeGenContext, CodeGenTask, }, symbol_resolver::SymbolValue, toplevel::{DefinitionId, TopLevelDef}, typecheck::typedef::{FunSignature, FuncArg, Type, TypeEnum, Unifier}, }; use inkwell::{ types::{BasicType, BasicTypeEnum}, values::{BasicValueEnum, IntValue, PointerValue}, AddressSpace, }; use itertools::{chain, izip, zip, Itertools}; use nac3parser::ast::{ self, Boolop, Comprehension, Constant, Expr, ExprKind, Operator, StrRef, }; use super::CodeGenerator; pub fn get_subst_key( unifier: &mut Unifier, obj: Option, fun_vars: &HashMap, filter: Option<&Vec>, ) -> String { let mut vars = obj .map(|ty| { if let TypeEnum::TObj { params, .. } = &*unifier.get_ty(ty) { params.borrow().clone() } else { unreachable!() } }) .unwrap_or_default(); vars.extend(fun_vars.iter()); let sorted = vars.keys().filter(|id| filter.map(|v| v.contains(id)).unwrap_or(true)).sorted(); sorted .map(|id| { unifier.stringify(vars[id], &mut |id| id.to_string(), &mut |id| id.to_string()) }) .join(", ") } impl<'ctx, 'a> CodeGenContext<'ctx, 'a> { pub fn build_gep_and_load( &mut self, ptr: PointerValue<'ctx>, index: &[IntValue<'ctx>], ) -> BasicValueEnum<'ctx> { unsafe { self.builder.build_load(self.builder.build_gep(ptr, index, "gep"), "load") } } fn get_subst_key( &mut self, obj: Option, fun: &FunSignature, filter: Option<&Vec>, ) -> String { get_subst_key(&mut self.unifier, obj, &fun.vars, filter) } pub fn get_attr_index(&mut self, ty: Type, attr: StrRef) -> usize { let obj_id = match &*self.unifier.get_ty(ty) { TypeEnum::TObj { obj_id, .. } => *obj_id, // we cannot have other types, virtual type should be handled by function calls _ => unreachable!(), }; let def = &self.top_level.definitions.read()[obj_id.0]; let index = if let TopLevelDef::Class { fields, .. } = &*def.read() { fields.iter().find_position(|x| x.0 == attr).unwrap().0 } else { unreachable!() }; index } fn gen_symbol_val(&mut self, val: &SymbolValue) -> BasicValueEnum<'ctx> { match val { SymbolValue::I32(v) => self.ctx.i32_type().const_int(*v as u64, true).into(), SymbolValue::I64(v) => self.ctx.i64_type().const_int(*v as u64, true).into(), SymbolValue::Bool(v) => self.ctx.bool_type().const_int(*v as u64, true).into(), SymbolValue::Double(v) => self.ctx.f64_type().const_float(*v).into(), SymbolValue::Tuple(ls) => { let vals = ls.iter().map(|v| self.gen_symbol_val(v)).collect_vec(); let fields = vals.iter().map(|v| v.get_type()).collect_vec(); let ty = self.ctx.struct_type(&fields, false); let ptr = self.builder.build_alloca(ty, "tuple"); let zero = self.ctx.i32_type().const_zero(); unsafe { for (i, val) in vals.into_iter().enumerate() { let p = self.builder.build_in_bounds_gep( ptr, &[zero, self.ctx.i32_type().const_int(i as u64, false)], "elemptr", ); self.builder.build_store(p, val); } } ptr.into() } } } pub fn get_llvm_type(&mut self, ty: Type) -> BasicTypeEnum<'ctx> { get_llvm_type(self.ctx, &mut self.unifier, self.top_level, &mut self.type_cache, ty) } fn gen_const(&mut self, value: &Constant, ty: Type) -> BasicValueEnum<'ctx> { match value { Constant::Bool(v) => { assert!(self.unifier.unioned(ty, self.primitives.bool)); let ty = self.ctx.bool_type(); ty.const_int(if *v { 1 } else { 0 }, false).into() } Constant::Int(v) => { let ty = if self.unifier.unioned(ty, self.primitives.int32) { self.ctx.i32_type() } else if self.unifier.unioned(ty, self.primitives.int64) { self.ctx.i64_type() } else { unreachable!(); }; let val: i64 = v.try_into().unwrap(); ty.const_int(val as u64, false).into() } Constant::Float(v) => { assert!(self.unifier.unioned(ty, self.primitives.float)); let ty = self.ctx.f64_type(); ty.const_float(*v).into() } Constant::Tuple(v) => { let ty = self.unifier.get_ty(ty); let types = if let TypeEnum::TTuple { ty } = &*ty { ty.clone() } else { unreachable!() }; let values = zip(types.into_iter(), v.iter()) .map(|(ty, v)| self.gen_const(v, ty)) .collect_vec(); let types = values.iter().map(BasicValueEnum::get_type).collect_vec(); let ty = self.ctx.struct_type(&types, false); ty.const_named_struct(&values).into() } Constant::Str(v) => { assert!(self.unifier.unioned(ty, self.primitives.str)); self.builder.build_global_string_ptr(v, "const").as_pointer_value().into() } _ => unreachable!(), } } pub fn gen_int_ops( &mut self, op: &Operator, lhs: BasicValueEnum<'ctx>, rhs: BasicValueEnum<'ctx>, ) -> BasicValueEnum<'ctx> { let (lhs, rhs) = if let (BasicValueEnum::IntValue(lhs), BasicValueEnum::IntValue(rhs)) = (lhs, rhs) { (lhs, rhs) } else { unreachable!() }; match op { Operator::Add => self.builder.build_int_add(lhs, rhs, "add").into(), Operator::Sub => self.builder.build_int_sub(lhs, rhs, "sub").into(), Operator::Mult => self.builder.build_int_mul(lhs, rhs, "mul").into(), Operator::Div => { let float = self.ctx.f64_type(); let left = self.builder.build_signed_int_to_float(lhs, float, "i2f"); let right = self.builder.build_signed_int_to_float(rhs, float, "i2f"); self.builder.build_float_div(left, right, "fdiv").into() } Operator::Mod => self.builder.build_int_signed_rem(lhs, rhs, "mod").into(), Operator::BitOr => self.builder.build_or(lhs, rhs, "or").into(), Operator::BitXor => self.builder.build_xor(lhs, rhs, "xor").into(), Operator::BitAnd => self.builder.build_and(lhs, rhs, "and").into(), Operator::LShift => self.builder.build_left_shift(lhs, rhs, "lshift").into(), Operator::RShift => self.builder.build_right_shift(lhs, rhs, true, "rshift").into(), Operator::FloorDiv => self.builder.build_int_signed_div(lhs, rhs, "floordiv").into(), // special implementation? Operator::Pow => unimplemented!(), Operator::MatMult => unreachable!(), } } pub fn gen_float_ops( &mut self, op: &Operator, lhs: BasicValueEnum<'ctx>, rhs: BasicValueEnum<'ctx>, ) -> BasicValueEnum<'ctx> { let (lhs, rhs) = if let (BasicValueEnum::FloatValue(lhs), BasicValueEnum::FloatValue(rhs)) = (lhs, rhs) { (lhs, rhs) } else { unreachable!() }; match op { Operator::Add => self.builder.build_float_add(lhs, rhs, "fadd").into(), Operator::Sub => self.builder.build_float_sub(lhs, rhs, "fsub").into(), Operator::Mult => self.builder.build_float_mul(lhs, rhs, "fmul").into(), Operator::Div => self.builder.build_float_div(lhs, rhs, "fdiv").into(), Operator::Mod => self.builder.build_float_rem(lhs, rhs, "fmod").into(), Operator::FloorDiv => { let div = self.builder.build_float_div(lhs, rhs, "fdiv"); let floor_intrinsic = self.module.get_function("llvm.floor.f64").unwrap_or_else(|| { let float = self.ctx.f64_type(); let fn_type = float.fn_type(&[float.into()], false); self.module.add_function("llvm.floor.f64", fn_type, None) }); self.builder .build_call(floor_intrinsic, &[div.into()], "floor") .try_as_basic_value() .left() .unwrap() } // special implementation? _ => unimplemented!(), } } } pub fn gen_constructor<'ctx, 'a, G: CodeGenerator + ?Sized>( generator: &mut G, ctx: &mut CodeGenContext<'ctx, 'a>, signature: &FunSignature, def: &TopLevelDef, params: Vec<(Option, BasicValueEnum<'ctx>)>, ) -> BasicValueEnum<'ctx> { match def { TopLevelDef::Class { methods, .. } => { // TODO: what about other fields that require alloca? let mut fun_id = None; for (name, _, id) in methods.iter() { if name == &"__init__".into() { fun_id = Some(*id); } } let ty = ctx.get_llvm_type(signature.ret).into_pointer_type(); let zelf_ty: BasicTypeEnum = ty.get_element_type().try_into().unwrap(); let zelf = ctx.builder.build_alloca(zelf_ty, "alloca").into(); // call `__init__` if there is one if let Some(fun_id) = fun_id { let mut sign = signature.clone(); sign.ret = ctx.primitives.none; generator.gen_call(ctx, Some((signature.ret, zelf)), (&sign, fun_id), params); } zelf } _ => unreachable!(), } } pub fn gen_func_instance<'ctx, 'a>( ctx: &mut CodeGenContext<'ctx, 'a>, obj: Option<(Type, BasicValueEnum<'ctx>)>, fun: (&FunSignature, &mut TopLevelDef, String), ) -> String { if let ( sign, TopLevelDef::Function { name, instance_to_symbol, instance_to_stmt, var_id, resolver, .. }, key, ) = fun { instance_to_symbol.get(&key).cloned().unwrap_or_else(|| { let symbol = format!("{}.{}", name, instance_to_symbol.len()); instance_to_symbol.insert(key, symbol.clone()); let key = ctx.get_subst_key(obj.map(|a| a.0), sign, Some(var_id)); let instance = instance_to_stmt.get(&key).unwrap(); let mut store = ConcreteTypeStore::new(); let mut cache = HashMap::new(); let subst = sign .vars .iter() .map(|(id, ty)| { ( *instance.subst.get(id).unwrap(), store.from_unifier_type(&mut ctx.unifier, &ctx.primitives, *ty, &mut cache), ) }) .collect(); let mut signature = store.from_signature(&mut ctx.unifier, &ctx.primitives, sign, &mut cache); if let Some(obj) = &obj { let zelf = store.from_unifier_type(&mut ctx.unifier, &ctx.primitives, obj.0, &mut cache); if let ConcreteTypeEnum::TFunc { args, .. } = &mut signature { args.insert( 0, ConcreteFuncArg { name: "self".into(), ty: zelf, default_value: None }, ) } else { unreachable!() } } let signature = store.add_cty(signature); ctx.registry.add_task(CodeGenTask { symbol_name: symbol.clone(), body: instance.body.clone(), resolver: resolver.as_ref().unwrap().clone(), calls: instance.calls.clone(), subst, signature, store, unifier_index: instance.unifier_id, }); symbol }) } else { unreachable!() } } pub fn gen_call<'ctx, 'a, G: CodeGenerator + ?Sized>( generator: &mut G, ctx: &mut CodeGenContext<'ctx, 'a>, obj: Option<(Type, BasicValueEnum<'ctx>)>, fun: (&FunSignature, DefinitionId), params: Vec<(Option, BasicValueEnum<'ctx>)>, ) -> Option> { let definition = ctx.top_level.definitions.read().get(fun.1 .0).cloned().unwrap(); let key = ctx.get_subst_key(obj.map(|a| a.0), fun.0, None); let symbol = { // make sure this lock guard is dropped at the end of this scope... let def = definition.read(); match &*def { TopLevelDef::Function { instance_to_symbol, codegen_callback, .. } => { if let Some(callback) = codegen_callback { return callback.run(ctx, obj, fun, params); } instance_to_symbol.get(&key).cloned() } TopLevelDef::Class { .. } => { return Some(generator.gen_constructor(ctx, fun.0, &*def, params)) } } } .unwrap_or_else(|| { generator.gen_func_instance(ctx, obj, (fun.0, &mut *definition.write(), key)) }); let fun_val = ctx.module.get_function(&symbol).unwrap_or_else(|| { let mut args = fun.0.args.clone(); if let Some(obj) = &obj { args.insert(0, FuncArg { name: "self".into(), ty: obj.0, default_value: None }); } let params = args.iter().map(|arg| ctx.get_llvm_type(arg.ty)).collect_vec(); let fun_ty = if ctx.unifier.unioned(fun.0.ret, ctx.primitives.none) { ctx.ctx.void_type().fn_type(¶ms, false) } else { ctx.get_llvm_type(fun.0.ret).fn_type(¶ms, false) }; ctx.module.add_function(&symbol, fun_ty, None) }); let mut keys = fun.0.args.clone(); let mut mapping = HashMap::new(); for (key, value) in params.into_iter() { mapping.insert(key.unwrap_or_else(|| keys.remove(0).name), value); } // default value handling for k in keys.into_iter() { mapping.insert(k.name, ctx.gen_symbol_val(&k.default_value.unwrap())); } // reorder the parameters let mut params = fun.0.args.iter().map(|arg| mapping.remove(&arg.name).unwrap()).collect_vec(); if let Some(obj) = obj { params.insert(0, obj.1); } ctx.builder.build_call(fun_val, ¶ms, "call").try_as_basic_value().left() } pub fn destructure_range<'ctx, 'a>( ctx: &mut CodeGenContext<'ctx, 'a>, range: PointerValue<'ctx>, ) -> (IntValue<'ctx>, IntValue<'ctx>, IntValue<'ctx>) { let int32 = ctx.ctx.i32_type(); let start = ctx .build_gep_and_load(range, &[int32.const_zero(), int32.const_int(0, false)]) .into_int_value(); let end = ctx .build_gep_and_load(range, &[int32.const_zero(), int32.const_int(1, false)]) .into_int_value(); let step = ctx .build_gep_and_load(range, &[int32.const_zero(), int32.const_int(2, false)]) .into_int_value(); (start, end, step) } pub fn allocate_list<'ctx, 'a>( ctx: &mut CodeGenContext<'ctx, 'a>, ty: BasicTypeEnum<'ctx>, length: IntValue<'ctx>, ) -> PointerValue<'ctx> { let arr_ptr = ctx.builder.build_array_alloca(ty, length, "tmparr"); let arr_ty = ctx.ctx.struct_type( &[ctx.ctx.i32_type().into(), ty.ptr_type(AddressSpace::Generic).into()], false, ); let zero = ctx.ctx.i32_type().const_zero(); let arr_str_ptr = ctx.builder.build_alloca(arr_ty, "tmparrstr"); unsafe { let len_ptr = ctx.builder.build_in_bounds_gep(arr_str_ptr, &[zero, zero], "len_ptr"); ctx.builder.build_store(len_ptr, length); let ptr_to_arr = ctx.builder.build_in_bounds_gep( arr_str_ptr, &[zero, ctx.ctx.i32_type().const_int(1, false)], "ptr_to_arr", ); ctx.builder.build_store(ptr_to_arr, arr_ptr); arr_str_ptr } } pub fn gen_comprehension<'ctx, 'a, G: CodeGenerator + ?Sized>( generator: &mut G, ctx: &mut CodeGenContext<'ctx, 'a>, expr: &Expr>, ) -> BasicValueEnum<'ctx> { if let ExprKind::ListComp { elt, generators } = &expr.node { let current = ctx.builder.get_insert_block().unwrap().get_parent().unwrap(); let test_bb = ctx.ctx.append_basic_block(current, "test"); let body_bb = ctx.ctx.append_basic_block(current, "body"); let cont_bb = ctx.ctx.append_basic_block(current, "cont"); let Comprehension { target, iter, ifs, .. } = &generators[0]; let iter_val = generator.gen_expr(ctx, iter).unwrap(); let int32 = ctx.ctx.i32_type(); let zero = int32.const_zero(); let index = generator.gen_var_alloc(ctx, ctx.primitives.int32); // counter = -1 ctx.builder.build_store(index, ctx.ctx.i32_type().const_zero()); let elem_ty = ctx.get_llvm_type(elt.custom.unwrap()); let is_range = ctx.unifier.unioned(iter.custom.unwrap(), ctx.primitives.range); let list; let list_content; if is_range { let iter_val = iter_val.into_pointer_value(); let (start, end, step) = destructure_range(ctx, iter_val); let diff = ctx.builder.build_int_sub(end, start, "diff"); // add 1 to the length as the value is rounded to zero // the length may be 1 more than the actual length if the division is exact, but the // length is a upper bound only anyway so it does not matter. let length = ctx.builder.build_int_signed_div(diff, step, "div"); let length = ctx.builder.build_int_add(length, int32.const_int(1, false), "add1"); // in case length is non-positive let is_valid = ctx.builder.build_int_compare(inkwell::IntPredicate::SGT, length, zero, "check"); let normal = ctx.ctx.append_basic_block(current, "normal_list"); let empty = ctx.ctx.append_basic_block(current, "empty_list"); let list_init = ctx.ctx.append_basic_block(current, "list_init"); ctx.builder.build_conditional_branch(is_valid, normal, empty); // normal: allocate a list ctx.builder.position_at_end(normal); let list_a = allocate_list(ctx, elem_ty, length); ctx.builder.build_unconditional_branch(list_init); ctx.builder.position_at_end(empty); let list_b = allocate_list(ctx, elem_ty, zero); ctx.builder.build_unconditional_branch(list_init); ctx.builder.position_at_end(list_init); let phi = ctx.builder.build_phi(list_a.get_type(), "phi"); phi.add_incoming(&[(&list_a, normal), (&list_b, empty)]); list = phi.as_basic_value().into_pointer_value(); list_content = ctx .build_gep_and_load(list, &[zero, int32.const_int(1, false)]) .into_pointer_value(); let i = generator.gen_store_target(ctx, target); ctx.builder.build_store(i, ctx.builder.build_int_sub(start, step, "start_init")); ctx.builder.build_unconditional_branch(test_bb); ctx.builder.position_at_end(test_bb); let sign = ctx.builder.build_int_compare( inkwell::IntPredicate::SGT, step, int32.const_zero(), "sign", ); // add and test let tmp = ctx.builder.build_int_add( ctx.builder.build_load(i, "i").into_int_value(), step, "start_loop", ); ctx.builder.build_store(i, tmp); // // if step > 0, continue when i < end let cmp1 = ctx.builder.build_int_compare(inkwell::IntPredicate::SLT, tmp, end, "cmp1"); // if step < 0, continue when i > end let cmp2 = ctx.builder.build_int_compare(inkwell::IntPredicate::SGT, tmp, end, "cmp2"); let pos = ctx.builder.build_and(sign, cmp1, "pos"); let neg = ctx.builder.build_and(ctx.builder.build_not(sign, "inv"), cmp2, "neg"); ctx.builder.build_conditional_branch( ctx.builder.build_or(pos, neg, "or"), body_bb, cont_bb, ); ctx.builder.position_at_end(body_bb); } else { let length = ctx .build_gep_and_load(iter_val.into_pointer_value(), &[zero, zero]) .into_int_value(); list = allocate_list(ctx, elem_ty, length); list_content = ctx .build_gep_and_load(list, &[zero, int32.const_int(1, false)]) .into_pointer_value(); let counter = generator.gen_var_alloc(ctx, ctx.primitives.int32); // counter = -1 ctx.builder.build_store(counter, ctx.ctx.i32_type().const_int(u64::max_value(), true)); ctx.builder.build_unconditional_branch(test_bb); ctx.builder.position_at_end(test_bb); let tmp = ctx.builder.build_load(counter, "i").into_int_value(); let tmp = ctx.builder.build_int_add(tmp, int32.const_int(1, false), "inc"); ctx.builder.build_store(counter, tmp); let cmp = ctx.builder.build_int_compare(inkwell::IntPredicate::SLT, tmp, length, "cmp"); ctx.builder.build_conditional_branch(cmp, body_bb, cont_bb); ctx.builder.position_at_end(body_bb); let arr_ptr = ctx .build_gep_and_load( iter_val.into_pointer_value(), &[zero, int32.const_int(1, false)], ) .into_pointer_value(); let val = ctx.build_gep_and_load(arr_ptr, &[tmp]); generator.gen_assign(ctx, target, val); } for cond in ifs.iter() { let result = generator.gen_expr(ctx, cond).unwrap().into_int_value(); let succ = ctx.ctx.append_basic_block(current, "then"); ctx.builder.build_conditional_branch(result, succ, test_bb); ctx.builder.position_at_end(succ); } let elem = generator.gen_expr(ctx, elt).unwrap(); let i = ctx.builder.build_load(index, "i").into_int_value(); let elem_ptr = unsafe { ctx.builder.build_gep(list_content, &[i], "elem_ptr") }; ctx.builder.build_store(elem_ptr, elem); ctx.builder .build_store(index, ctx.builder.build_int_add(i, int32.const_int(1, false), "inc")); ctx.builder.build_unconditional_branch(test_bb); ctx.builder.position_at_end(cont_bb); let len_ptr = unsafe { ctx.builder.build_gep(list, &[zero, zero], "length") }; ctx.builder.build_store(len_ptr, ctx.builder.build_load(index, "index")); list.into() } else { unreachable!() } } pub fn gen_expr<'ctx, 'a, G: CodeGenerator + ?Sized>( generator: &mut G, ctx: &mut CodeGenContext<'ctx, 'a>, expr: &Expr>, ) -> Option> { let int32 = ctx.ctx.i32_type(); let zero = int32.const_int(0, false); Some(match &expr.node { ExprKind::Constant { value, .. } => { let ty = expr.custom.unwrap(); ctx.gen_const(value, ty) } ExprKind::Name { id, .. } => { let ptr = ctx.var_assignment.get(id); if let Some(ptr) = ptr { ctx.builder.build_load(*ptr, "load") } else { let resolver = ctx.resolver.clone(); resolver.get_symbol_value(*id, ctx).unwrap() } } ExprKind::List { elts, .. } => { // this shall be optimized later for constant primitive lists... // we should use memcpy for that instead of generating thousands of stores let elements = elts.iter().map(|x| generator.gen_expr(ctx, x).unwrap()).collect_vec(); let ty = if elements.is_empty() { int32.into() } else { elements[0].get_type() }; let length = int32.const_int(elements.len() as u64, false); let arr_str_ptr = allocate_list(ctx, ty, length); let arr_ptr = ctx .build_gep_and_load(arr_str_ptr, &[zero, int32.const_int(1, false)]) .into_pointer_value(); unsafe { for (i, v) in elements.iter().enumerate() { let elem_ptr = ctx.builder.build_gep( arr_ptr, &[int32.const_int(i as u64, false)], "elem_ptr", ); ctx.builder.build_store(elem_ptr, *v); } } arr_str_ptr.into() } ExprKind::Tuple { elts, .. } => { let element_val = elts.iter().map(|x| generator.gen_expr(ctx, x).unwrap()).collect_vec(); let element_ty = element_val.iter().map(BasicValueEnum::get_type).collect_vec(); let tuple_ty = ctx.ctx.struct_type(&element_ty, false); let tuple_ptr = ctx.builder.build_alloca(tuple_ty, "tuple"); for (i, v) in element_val.into_iter().enumerate() { unsafe { let ptr = ctx.builder.build_in_bounds_gep( tuple_ptr, &[zero, int32.const_int(i as u64, false)], "ptr", ); ctx.builder.build_store(ptr, v); } } tuple_ptr.into() } ExprKind::Attribute { value, attr, .. } => { // note that we would handle class methods directly in calls let index = ctx.get_attr_index(value.custom.unwrap(), *attr); let ptr = generator.gen_expr(ctx, value).unwrap().into_pointer_value(); ctx.build_gep_and_load(ptr, &[zero, int32.const_int(index as u64, false)]) } ExprKind::BoolOp { op, values } => { // requires conditional branches for short-circuiting... let left = generator.gen_expr(ctx, &values[0]).unwrap().into_int_value(); let current = ctx.builder.get_insert_block().unwrap().get_parent().unwrap(); let a_bb = ctx.ctx.append_basic_block(current, "a"); let b_bb = ctx.ctx.append_basic_block(current, "b"); let cont_bb = ctx.ctx.append_basic_block(current, "cont"); ctx.builder.build_conditional_branch(left, a_bb, b_bb); let (a, b) = match op { Boolop::Or => { ctx.builder.position_at_end(a_bb); let a = ctx.ctx.bool_type().const_int(1, false); ctx.builder.build_unconditional_branch(cont_bb); ctx.builder.position_at_end(b_bb); let b = generator.gen_expr(ctx, &values[1]).unwrap().into_int_value(); ctx.builder.build_unconditional_branch(cont_bb); (a, b) } Boolop::And => { ctx.builder.position_at_end(a_bb); let a = generator.gen_expr(ctx, &values[1]).unwrap().into_int_value(); ctx.builder.build_unconditional_branch(cont_bb); ctx.builder.position_at_end(b_bb); let b = ctx.ctx.bool_type().const_int(0, false); ctx.builder.build_unconditional_branch(cont_bb); (a, b) } }; ctx.builder.position_at_end(cont_bb); let phi = ctx.builder.build_phi(ctx.ctx.bool_type(), "phi"); phi.add_incoming(&[(&a, a_bb), (&b, b_bb)]); phi.as_basic_value() } ExprKind::BinOp { op, left, right } => { let ty1 = ctx.unifier.get_representative(left.custom.unwrap()); let ty2 = ctx.unifier.get_representative(right.custom.unwrap()); let left = generator.gen_expr(ctx, left).unwrap(); let right = generator.gen_expr(ctx, right).unwrap(); // we can directly compare the types, because we've got their representatives // which would be unchanged until further unification, which we would never do // when doing code generation for function instances if ty1 == ty2 && [ctx.primitives.int32, ctx.primitives.int64].contains(&ty1) { ctx.gen_int_ops(op, left, right) } else if ty1 == ty2 && ctx.primitives.float == ty1 { ctx.gen_float_ops(op, left, right) } else { unimplemented!() } } ExprKind::UnaryOp { op, operand } => { let ty = ctx.unifier.get_representative(operand.custom.unwrap()); let val = generator.gen_expr(ctx, operand).unwrap(); if ty == ctx.primitives.bool { let val = val.into_int_value(); match op { ast::Unaryop::Invert | ast::Unaryop::Not => { ctx.builder.build_not(val, "not").into() } _ => val.into(), } } else if [ctx.primitives.int32, ctx.primitives.int64].contains(&ty) { let val = val.into_int_value(); match op { ast::Unaryop::USub => ctx.builder.build_int_neg(val, "neg").into(), ast::Unaryop::Invert => ctx.builder.build_not(val, "not").into(), ast::Unaryop::Not => ctx .builder .build_int_compare( inkwell::IntPredicate::EQ, val, val.get_type().const_zero(), "not", ) .into(), _ => val.into(), } } else if ty == ctx.primitives.float { let val = if let BasicValueEnum::FloatValue(val) = val { val } else { unreachable!() }; match op { ast::Unaryop::USub => ctx.builder.build_float_neg(val, "neg").into(), ast::Unaryop::Not => ctx .builder .build_float_compare( inkwell::FloatPredicate::OEQ, val, val.get_type().const_zero(), "not", ) .into(), _ => val.into(), } } else { unimplemented!() } } ExprKind::Compare { left, ops, comparators } => { izip!(chain(once(left.as_ref()), comparators.iter()), comparators.iter(), ops.iter(),) .fold(None, |prev, (lhs, rhs, op)| { let ty = ctx.unifier.get_representative(lhs.custom.unwrap()); let current = if [ctx.primitives.int32, ctx.primitives.int64, ctx.primitives.bool] .contains(&ty) { let (lhs, rhs) = if let ( BasicValueEnum::IntValue(lhs), BasicValueEnum::IntValue(rhs), ) = ( generator.gen_expr(ctx, lhs).unwrap(), generator.gen_expr(ctx, rhs).unwrap(), ) { (lhs, rhs) } else { unreachable!() }; let op = match op { ast::Cmpop::Eq | ast::Cmpop::Is => inkwell::IntPredicate::EQ, ast::Cmpop::NotEq => inkwell::IntPredicate::NE, ast::Cmpop::Lt => inkwell::IntPredicate::SLT, ast::Cmpop::LtE => inkwell::IntPredicate::SLE, ast::Cmpop::Gt => inkwell::IntPredicate::SGT, ast::Cmpop::GtE => inkwell::IntPredicate::SGE, _ => unreachable!(), }; ctx.builder.build_int_compare(op, lhs, rhs, "cmp") } else if ty == ctx.primitives.float { let (lhs, rhs) = if let ( BasicValueEnum::FloatValue(lhs), BasicValueEnum::FloatValue(rhs), ) = ( generator.gen_expr(ctx, lhs).unwrap(), generator.gen_expr(ctx, rhs).unwrap(), ) { (lhs, rhs) } else { unreachable!() }; let op = match op { ast::Cmpop::Eq | ast::Cmpop::Is => inkwell::FloatPredicate::OEQ, ast::Cmpop::NotEq => inkwell::FloatPredicate::ONE, ast::Cmpop::Lt => inkwell::FloatPredicate::OLT, ast::Cmpop::LtE => inkwell::FloatPredicate::OLE, ast::Cmpop::Gt => inkwell::FloatPredicate::OGT, ast::Cmpop::GtE => inkwell::FloatPredicate::OGE, _ => unreachable!(), }; ctx.builder.build_float_compare(op, lhs, rhs, "cmp") } else { unimplemented!() }; prev.map(|v| ctx.builder.build_and(v, current, "cmp")).or(Some(current)) }) .unwrap() .into() // as there should be at least 1 element, it should never be none } ExprKind::IfExp { test, body, orelse } => { let test = generator.gen_expr(ctx, test).unwrap().into_int_value(); let current = ctx.builder.get_insert_block().unwrap().get_parent().unwrap(); let then_bb = ctx.ctx.append_basic_block(current, "then"); let else_bb = ctx.ctx.append_basic_block(current, "else"); let cont_bb = ctx.ctx.append_basic_block(current, "cont"); ctx.builder.build_conditional_branch(test, then_bb, else_bb); ctx.builder.position_at_end(then_bb); let a = generator.gen_expr(ctx, body).unwrap(); ctx.builder.build_unconditional_branch(cont_bb); ctx.builder.position_at_end(else_bb); let b = generator.gen_expr(ctx, orelse).unwrap(); ctx.builder.build_unconditional_branch(cont_bb); ctx.builder.position_at_end(cont_bb); let phi = ctx.builder.build_phi(a.get_type(), "ifexpr"); phi.add_incoming(&[(&a, then_bb), (&b, else_bb)]); phi.as_basic_value() } ExprKind::Call { func, args, keywords } => { let mut params = args.iter().map(|arg| (None, generator.gen_expr(ctx, arg).unwrap())).collect_vec(); let kw_iter = keywords.iter().map(|kw| { ( Some(*kw.node.arg.as_ref().unwrap()), generator.gen_expr(ctx, &kw.node.value).unwrap(), ) }); params.extend(kw_iter); let call = ctx.calls.get(&expr.location.into()); let signature = match call { Some(call) => ctx.unifier.get_call_signature(*call).unwrap(), None => { let ty = func.custom.unwrap(); if let TypeEnum::TFunc(sign) = &*ctx.unifier.get_ty(ty) { sign.borrow().clone() } else { unreachable!() } } }; match &func.as_ref().node { ExprKind::Name { id, .. } => { // TODO: handle primitive casts and function pointers let fun = ctx.resolver.get_identifier_def(*id).expect("Unknown identifier"); return generator.gen_call(ctx, None, (&signature, fun), params); } ExprKind::Attribute { value, attr, .. } => { let val = generator.gen_expr(ctx, value).unwrap(); let id = if let TypeEnum::TObj { obj_id, .. } = &*ctx.unifier.get_ty(value.custom.unwrap()) { *obj_id } else { unreachable!() }; let fun_id = { let defs = ctx.top_level.definitions.read(); let obj_def = defs.get(id.0).unwrap().read(); if let TopLevelDef::Class { methods, .. } = &*obj_def { let mut fun_id = None; for (name, _, id) in methods.iter() { if name == attr { fun_id = Some(*id); } } fun_id.unwrap() } else { unreachable!() } }; return generator.gen_call( ctx, Some((value.custom.unwrap(), val)), (&signature, fun_id), params, ); } _ => unimplemented!(), } } ExprKind::Subscript { value, slice, .. } => { if let TypeEnum::TList { .. } = &*ctx.unifier.get_ty(value.custom.unwrap()) { if let ExprKind::Slice { .. } = slice.node { unimplemented!() } else { // TODO: bound check let v = generator.gen_expr(ctx, value).unwrap().into_pointer_value(); let index = generator.gen_expr(ctx, slice).unwrap().into_int_value(); let arr_ptr = ctx.build_gep_and_load(v, &[int32.const_zero(), int32.const_int(1, false)]); ctx.build_gep_and_load(arr_ptr.into_pointer_value(), &[index]) } } else { let v = generator.gen_expr(ctx, value).unwrap().into_pointer_value(); let index = generator.gen_expr(ctx, slice).unwrap().into_int_value(); ctx.build_gep_and_load(v, &[int32.const_zero(), index]) } } ExprKind::ListComp { .. } => gen_comprehension(generator, ctx, expr), _ => unimplemented!(), }) }