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core: reimplement assignment type inference and codegen + other minor changes & refactor #483

Merged
sb10q merged 4 commits from setitem-assign into master 2024-08-05 19:31:06 +08:00
Conversation 4 Commits 4 Files Changed 6 +1120 -593
6 changed files with 1120 additions and 593 deletions
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188
nac3core/src/codegen/expr.rs
View File

@ -995,8 +995,10 @@ pub fn gen_comprehension<'ctx, G: CodeGenerator>(
ctx.builder.position_at_end(init_bb); ctx.builder.position_at_end(init_bb);
let Comprehension { target, iter, ifs, .. } = &generators[0]; let Comprehension { target, iter, ifs, .. } = &generators[0];
let iter_ty = iter.custom.unwrap();
let iter_val = if let Some(v) = generator.gen_expr(ctx, iter)? { let iter_val = if let Some(v) = generator.gen_expr(ctx, iter)? {
v.to_basic_value_enum(ctx, generator, iter.custom.unwrap())? v.to_basic_value_enum(ctx, generator, iter_ty)?
} else { } else {
for bb in [test_bb, body_bb, cont_bb] { for bb in [test_bb, body_bb, cont_bb] {
ctx.builder.position_at_end(bb); ctx.builder.position_at_end(bb);
@ -1014,96 +1016,120 @@ pub fn gen_comprehension<'ctx, G: CodeGenerator>(
ctx.builder.build_store(index, zero_size_t).unwrap(); ctx.builder.build_store(index, zero_size_t).unwrap();
let elem_ty = ctx.get_llvm_type(generator, elt.custom.unwrap()); let elem_ty = ctx.get_llvm_type(generator, elt.custom.unwrap());
let is_range = ctx.unifier.unioned(iter.custom.unwrap(), ctx.primitives.range);
let list; let list;
if is_range { match &*ctx.unifier.get_ty(iter_ty) {
let iter_val = RangeValue::from_ptr_val(iter_val.into_pointer_value(), Some("range")); TypeEnum::TObj { obj_id, .. }
let (start, stop, step) = destructure_range(ctx, iter_val); if *obj_id == ctx.primitives.range.obj_id(&ctx.unifier).unwrap() =>
let diff = ctx.builder.build_int_sub(stop, start, "diff").unwrap(); {
// add 1 to the length as the value is rounded to zero let iter_val = RangeValue::from_ptr_val(iter_val.into_pointer_value(), Some("range"));
// the length may be 1 more than the actual length if the division is exact, but the let (start, stop, step) = destructure_range(ctx, iter_val);
// length is a upper bound only anyway so it does not matter. let diff = ctx.builder.build_int_sub(stop, start, "diff").unwrap();
let length = ctx.builder.build_int_signed_div(diff, step, "div").unwrap(); // add 1 to the length as the value is rounded to zero
let length = ctx.builder.build_int_add(length, int32.const_int(1, false), "add1").unwrap(); // the length may be 1 more than the actual length if the division is exact, but the
// in case length is non-positive // length is a upper bound only anyway so it does not matter.
let is_valid = let length = ctx.builder.build_int_signed_div(diff, step, "div").unwrap();
ctx.builder.build_int_compare(IntPredicate::SGT, length, zero_32, "check").unwrap(); let length =
ctx.builder.build_int_add(length, int32.const_int(1, false), "add1").unwrap();
// in case length is non-positive
let is_valid =
ctx.builder.build_int_compare(IntPredicate::SGT, length, zero_32, "check").unwrap();
let list_alloc_size = ctx let list_alloc_size = ctx
.builder .builder
.build_select( .build_select(
is_valid, is_valid,
ctx.builder.build_int_z_extend_or_bit_cast(length, size_t, "z_ext_len").unwrap(), ctx.builder
zero_size_t, .build_int_z_extend_or_bit_cast(length, size_t, "z_ext_len")
"listcomp.alloc_size", .unwrap(),
) zero_size_t,
.unwrap(); "listcomp.alloc_size",
list = allocate_list( )
generator, .unwrap();
ctx, list = allocate_list(
Some(elem_ty), generator,
list_alloc_size.into_int_value(), ctx,
Some("listcomp.addr"), Some(elem_ty),
); list_alloc_size.into_int_value(),
Some("listcomp.addr"),
);
let i = generator.gen_store_target(ctx, target, Some("i.addr"))?.unwrap(); let i = generator.gen_store_target(ctx, target, Some("i.addr"))?.unwrap();
ctx.builder ctx.builder
.build_store(i, ctx.builder.build_int_sub(start, step, "start_init").unwrap()) .build_store(i, ctx.builder.build_int_sub(start, step, "start_init").unwrap())
.unwrap(); .unwrap();
ctx.builder ctx.builder
.build_conditional_branch(gen_in_range_check(ctx, start, stop, step), test_bb, cont_bb) .build_conditional_branch(
.unwrap(); gen_in_range_check(ctx, start, stop, step),
test_bb,
cont_bb,
)
.unwrap();
ctx.builder.position_at_end(test_bb); ctx.builder.position_at_end(test_bb);
// add and test // add and test
let tmp = ctx let tmp = ctx
.builder .builder
.build_int_add( .build_int_add(
ctx.builder.build_load(i, "i").map(BasicValueEnum::into_int_value).unwrap(), ctx.builder.build_load(i, "i").map(BasicValueEnum::into_int_value).unwrap(),
step, step,
"start_loop", "start_loop",
) )
.unwrap(); .unwrap();
ctx.builder.build_store(i, tmp).unwrap(); ctx.builder.build_store(i, tmp).unwrap();
ctx.builder ctx.builder
.build_conditional_branch(gen_in_range_check(ctx, tmp, stop, step), body_bb, cont_bb) .build_conditional_branch(
.unwrap(); gen_in_range_check(ctx, tmp, stop, step),
body_bb,
cont_bb,
)
.unwrap();
ctx.builder.position_at_end(body_bb); ctx.builder.position_at_end(body_bb);
} else { }
let length = ctx TypeEnum::TObj { obj_id, .. }
.build_gep_and_load( if *obj_id == ctx.primitives.list.obj_id(&ctx.unifier).unwrap() =>
iter_val.into_pointer_value(), {
&[zero_size_t, int32.const_int(1, false)], let length = ctx
Some("length"), .build_gep_and_load(
) iter_val.into_pointer_value(),
.into_int_value(); &[zero_size_t, int32.const_int(1, false)],
list = allocate_list(generator, ctx, Some(elem_ty), length, Some("listcomp")); Some("length"),
)
.into_int_value();
list = allocate_list(generator, ctx, Some(elem_ty), length, Some("listcomp"));
let counter = generator.gen_var_alloc(ctx, size_t.into(), Some("counter.addr"))?; let counter = generator.gen_var_alloc(ctx, size_t.into(), Some("counter.addr"))?;
// counter = -1 // counter = -1
ctx.builder.build_store(counter, size_t.const_all_ones()).unwrap(); ctx.builder.build_store(counter, size_t.const_all_ones()).unwrap();
ctx.builder.build_unconditional_branch(test_bb).unwrap(); ctx.builder.build_unconditional_branch(test_bb).unwrap();
ctx.builder.position_at_end(test_bb); ctx.builder.position_at_end(test_bb);
let tmp = ctx.builder.build_load(counter, "i").map(BasicValueEnum::into_int_value).unwrap(); let tmp =
let tmp = ctx.builder.build_int_add(tmp, size_t.const_int(1, false), "inc").unwrap(); ctx.builder.build_load(counter, "i").map(BasicValueEnum::into_int_value).unwrap();
ctx.builder.build_store(counter, tmp).unwrap(); let tmp = ctx.builder.build_int_add(tmp, size_t.const_int(1, false), "inc").unwrap();
let cmp = ctx.builder.build_int_compare(IntPredicate::SLT, tmp, length, "cmp").unwrap(); ctx.builder.build_store(counter, tmp).unwrap();
ctx.builder.build_conditional_branch(cmp, body_bb, cont_bb).unwrap(); let cmp = ctx.builder.build_int_compare(IntPredicate::SLT, tmp, length, "cmp").unwrap();
ctx.builder.build_conditional_branch(cmp, body_bb, cont_bb).unwrap();
ctx.builder.position_at_end(body_bb); ctx.builder.position_at_end(body_bb);
let arr_ptr = ctx let arr_ptr = ctx
.build_gep_and_load( .build_gep_and_load(
iter_val.into_pointer_value(), iter_val.into_pointer_value(),
&[zero_size_t, zero_32], &[zero_size_t, zero_32],
Some("arr.addr"), Some("arr.addr"),
) )
.into_pointer_value(); .into_pointer_value();
let val = ctx.build_gep_and_load(arr_ptr, &[tmp], Some("val")); let val = ctx.build_gep_and_load(arr_ptr, &[tmp], Some("val"));
generator.gen_assign(ctx, target, val.into())?; generator.gen_assign(ctx, target, val.into(), elt.custom.unwrap())?;
}
_ => {
panic!(
"unsupported list comprehension iterator type: {}",
ctx.unifier.stringify(iter_ty)
);
}
} }
// Emits the content of `cont_bb` // Emits the content of `cont_bb`

36
nac3core/src/codegen/generator.rs
View File

@ -123,11 +123,45 @@ pub trait CodeGenerator {
ctx: &mut CodeGenContext<'ctx, '_>, ctx: &mut CodeGenContext<'ctx, '_>,
target: &Expr<Option<Type>>, target: &Expr<Option<Type>>,
value: ValueEnum<'ctx>, value: ValueEnum<'ctx>,
value_ty: Type,
) -> Result<(), String> ) -> Result<(), String>
where where
Self: Sized, Self: Sized,
{ {
gen_assign(self, ctx, target, value) gen_assign(self, ctx, target, value, value_ty)
}
/// Generate code for an assignment expression where LHS is a `"target_list"`.
///
/// See <https://docs.python.org/3/reference/simple_stmts.html#assignment-statements>.
fn gen_assign_target_list<'ctx>(
&mut self,
ctx: &mut CodeGenContext<'ctx, '_>,
targets: &Vec<Expr<Option<Type>>>,
value: ValueEnum<'ctx>,
value_ty: Type,
) -> Result<(), String>
where
Self: Sized,
{
gen_assign_target_list(self, ctx, targets, value, value_ty)
}
/// Generate code for an item assignment.
///
/// i.e., `target[key] = value`
fn gen_setitem<'ctx>(
&mut self,
ctx: &mut CodeGenContext<'ctx, '_>,
target: &Expr<Option<Type>>,
key: &Expr<Option<Type>>,
value: ValueEnum<'ctx>,
value_ty: Type,
) -> Result<(), String>
where
Self: Sized,
{
gen_setitem(self, ctx, target, key, value, value_ty)
} }
/// Generate code for a while expression. /// Generate code for a while expression.

589
nac3core/src/codegen/stmt.rs
View File

@ -10,10 +10,10 @@ use crate::{
expr::gen_binop_expr, expr::gen_binop_expr,
gen_in_range_check, gen_in_range_check,
}, },
toplevel::{helper::PrimDef, numpy::unpack_ndarray_var_tys, DefinitionId, TopLevelDef}, toplevel::{DefinitionId, TopLevelDef},
typecheck::{ typecheck::{
magic_methods::Binop, magic_methods::Binop,
typedef::{FunSignature, Type, TypeEnum}, typedef::{iter_type_vars, FunSignature, Type, TypeEnum},
}, },
}; };
use inkwell::{ use inkwell::{
@ -23,10 +23,10 @@ use inkwell::{
values::{BasicValue, BasicValueEnum, FunctionValue, IntValue, PointerValue}, values::{BasicValue, BasicValueEnum, FunctionValue, IntValue, PointerValue},
IntPredicate, IntPredicate,
}; };
use itertools::{izip, Itertools};
use nac3parser::ast::{ use nac3parser::ast::{
Constant, ExcepthandlerKind, Expr, ExprKind, Location, Stmt, StmtKind, StrRef, Constant, ExcepthandlerKind, Expr, ExprKind, Location, Stmt, StmtKind, StrRef,
}; };
use std::convert::TryFrom;
/// See [`CodeGenerator::gen_var_alloc`]. /// See [`CodeGenerator::gen_var_alloc`].
pub fn gen_var<'ctx>( pub fn gen_var<'ctx>(
@ -97,8 +97,6 @@ pub fn gen_store_target<'ctx, G: CodeGenerator>(
pattern: &Expr<Option<Type>>, pattern: &Expr<Option<Type>>,
name: Option<&str>, name: Option<&str>,
) -> Result<Option<PointerValue<'ctx>>, String> { ) -> Result<Option<PointerValue<'ctx>>, String> {
let llvm_usize = generator.get_size_type(ctx.ctx);
// very similar to gen_expr, but we don't do an extra load at the end // very similar to gen_expr, but we don't do an extra load at the end
// and we flatten nested tuples // and we flatten nested tuples
Ok(Some(match &pattern.node { Ok(Some(match &pattern.node {
@ -137,65 +135,6 @@ pub fn gen_store_target<'ctx, G: CodeGenerator>(
} }
.unwrap() .unwrap()
} }
ExprKind::Subscript { value, slice, .. } => {
match ctx.unifier.get_ty_immutable(value.custom.unwrap()).as_ref() {
TypeEnum::TObj { obj_id, .. } if *obj_id == PrimDef::List.id() => {
let v = generator
.gen_expr(ctx, value)?
.unwrap()
.to_basic_value_enum(ctx, generator, value.custom.unwrap())?
.into_pointer_value();
let v = ListValue::from_ptr_val(v, llvm_usize, None);
let len = v.load_size(ctx, Some("len"));
let raw_index = generator
.gen_expr(ctx, slice)?
.unwrap()
.to_basic_value_enum(ctx, generator, slice.custom.unwrap())?
.into_int_value();
let raw_index = ctx
.builder
.build_int_s_extend(raw_index, generator.get_size_type(ctx.ctx), "sext")
.unwrap();
// handle negative index
let is_negative = ctx
.builder
.build_int_compare(
IntPredicate::SLT,
raw_index,
generator.get_size_type(ctx.ctx).const_zero(),
"is_neg",
)
.unwrap();
let adjusted = ctx.builder.build_int_add(raw_index, len, "adjusted").unwrap();
let index = ctx
.builder
.build_select(is_negative, adjusted, raw_index, "index")
.map(BasicValueEnum::into_int_value)
.unwrap();
// unsigned less than is enough, because negative index after adjustment is
// bigger than the length (for unsigned cmp)
let bound_check = ctx
.builder
.build_int_compare(IntPredicate::ULT, index, len, "inbound")
.unwrap();
ctx.make_assert(
generator,
bound_check,
"0:IndexError",
"index {0} out of bounds 0:{1}",
[Some(raw_index), Some(len), None],
slice.location,
);
v.data().ptr_offset(ctx, generator, &index, name)
}
TypeEnum::TObj { obj_id, .. } if *obj_id == PrimDef::NDArray.id() => {
todo!()
}
_ => unreachable!(),
}
}
_ => unreachable!(), _ => unreachable!(),
})) }))
} }
@ -206,70 +145,20 @@ pub fn gen_assign<'ctx, G: CodeGenerator>(
ctx: &mut CodeGenContext<'ctx, '_>, ctx: &mut CodeGenContext<'ctx, '_>,
target: &Expr<Option<Type>>, target: &Expr<Option<Type>>,
value: ValueEnum<'ctx>, value: ValueEnum<'ctx>,
value_ty: Type,
) -> Result<(), String> { ) -> Result<(), String> {
let llvm_usize = generator.get_size_type(ctx.ctx); // See https://docs.python.org/3/reference/simple_stmts.html#assignment-statements.
match &target.node { match &target.node {
ExprKind::Tuple { elts, .. } => { ExprKind::Subscript { value: target, slice: key, .. } => {
let BasicValueEnum::StructValue(v) = // Handle "slicing" or "subscription"
value.to_basic_value_enum(ctx, generator, target.custom.unwrap())? generator.gen_setitem(ctx, target, key, value, value_ty)?;
else {
unreachable!()
};
for (i, elt) in elts.iter().enumerate() {
let v = ctx
.builder
.build_extract_value(v, u32::try_from(i).unwrap(), "struct_elem")
.unwrap();
generator.gen_assign(ctx, elt, v.into())?;
}
} }
ExprKind::Subscript { value: ls, slice, .. } ExprKind::Tuple { elts, .. } | ExprKind::List { elts, .. } => {
if matches!(&slice.node, ExprKind::Slice { .. }) => // Fold on `"[" [target_list] "]"` and `"(" [target_list] ")"`
{ generator.gen_assign_target_list(ctx, elts, value, value_ty)?;
let ExprKind::Slice { lower, upper, step } = &slice.node else { unreachable!() };
let ls = generator
.gen_expr(ctx, ls)?
.unwrap()
.to_basic_value_enum(ctx, generator, ls.custom.unwrap())?
.into_pointer_value();
let ls = ListValue::from_ptr_val(ls, llvm_usize, None);
let Some((start, end, step)) =
handle_slice_indices(lower, upper, step, ctx, generator, ls.load_size(ctx, None))?
else {
return Ok(());
};
let value = value
.to_basic_value_enum(ctx, generator, target.custom.unwrap())?
.into_pointer_value();
let value = ListValue::from_ptr_val(value, llvm_usize, None);
let ty = match &*ctx.unifier.get_ty_immutable(target.custom.unwrap()) {
TypeEnum::TObj { obj_id, params, .. } if *obj_id == PrimDef::List.id() => {
*params.iter().next().unwrap().1
}
TypeEnum::TObj { obj_id, .. } if *obj_id == PrimDef::NDArray.id() => {
unpack_ndarray_var_tys(&mut ctx.unifier, target.custom.unwrap()).0
}
_ => unreachable!(),
};
let ty = ctx.get_llvm_type(generator, ty);
let Some(src_ind) = handle_slice_indices(
&None,
&None,
&None,
ctx,
generator,
value.load_size(ctx, None),
)?
else {
return Ok(());
};
list_slice_assignment(generator, ctx, ty, ls, (start, end, step), value, src_ind);
} }
_ => { _ => {
// Handle attribute and direct variable assignments.
let name = if let ExprKind::Name { id, .. } = &target.node { let name = if let ExprKind::Name { id, .. } = &target.node {
format!("{id}.addr") format!("{id}.addr")
} else { } else {
@ -293,6 +182,233 @@ pub fn gen_assign<'ctx, G: CodeGenerator>(
Ok(()) Ok(())
} }
/// See [`CodeGenerator::gen_assign_target_list`].
pub fn gen_assign_target_list<'ctx, G: CodeGenerator>(
generator: &mut G,
ctx: &mut CodeGenContext<'ctx, '_>,
targets: &Vec<Expr<Option<Type>>>,
value: ValueEnum<'ctx>,
value_ty: Type,
) -> Result<(), String> {
// Deconstruct the tuple `value`
let BasicValueEnum::StructValue(tuple) = value.to_basic_value_enum(ctx, generator, value_ty)?
else {
unreachable!()
};
// NOTE: Currently, RHS's type is forced to be a Tuple by the type inferencer.
let TypeEnum::TTuple { ty: tuple_tys } = &*ctx.unifier.get_ty(value_ty) else {
unreachable!();
};
assert_eq!(tuple.get_type().count_fields() as usize, tuple_tys.len());
let tuple = (0..tuple.get_type().count_fields())
.map(|i| ctx.builder.build_extract_value(tuple, i, "item").unwrap())
.collect_vec();
// Find the starred target if it exists.
let mut starred_target_index: Option<usize> = None; // Index of the "starred" target. If it exists, there may only be one.
for (i, target) in targets.iter().enumerate() {
if matches!(target.node, ExprKind::Starred { .. }) {
assert!(starred_target_index.is_none()); // The typechecker ensures this
starred_target_index = Some(i);
}
}
if let Some(starred_target_index) = starred_target_index {
assert!(tuple_tys.len() >= targets.len() - 1); // The typechecker ensures this
let a = starred_target_index; // Number of RHS values before the starred target
let b = tuple_tys.len() - (targets.len() - 1 - starred_target_index); // Number of RHS values after the starred target
// Thus `tuple[a..b]` is assigned to the starred target.
// Handle assignment before the starred target
for (target, val, val_ty) in
izip!(&targets[..starred_target_index], &tuple[..a], &tuple_tys[..a])
{
generator.gen_assign(ctx, target, ValueEnum::Dynamic(*val), *val_ty)?;
}
// Handle assignment to the starred target
if let ExprKind::Starred { value: target, .. } = &targets[starred_target_index].node {
let vals = &tuple[a..b];
let val_tys = &tuple_tys[a..b];
// Create a sub-tuple from `value` for the starred target.
let sub_tuple_ty = ctx
.ctx
.struct_type(&vals.iter().map(BasicValueEnum::get_type).collect_vec(), false);
let psub_tuple_val =
ctx.builder.build_alloca(sub_tuple_ty, "starred_target_value_ptr").unwrap();
for (i, val) in vals.iter().enumerate() {
let pitem = ctx
.builder
.build_struct_gep(psub_tuple_val, i as u32, "starred_target_value_item")
.unwrap();
ctx.builder.build_store(pitem, *val).unwrap();
}
let sub_tuple_val =
ctx.builder.build_load(psub_tuple_val, "starred_target_value").unwrap();
// Create the typechecker type of the sub-tuple
let sub_tuple_ty = ctx.unifier.add_ty(TypeEnum::TTuple { ty: val_tys.to_vec() });
// Now assign with that sub-tuple to the starred target.
generator.gen_assign(ctx, target, ValueEnum::Dynamic(sub_tuple_val), sub_tuple_ty)?;
} else {
unreachable!() // The typechecker ensures this
}
// Handle assignment after the starred target
for (target, val, val_ty) in
izip!(&targets[starred_target_index + 1..], &tuple[b..], &tuple_tys[b..])
{
generator.gen_assign(ctx, target, ValueEnum::Dynamic(*val), *val_ty)?;
}
} else {
assert_eq!(tuple_tys.len(), targets.len()); // The typechecker ensures this
for (target, val, val_ty) in izip!(targets, tuple, tuple_tys) {
generator.gen_assign(ctx, target, ValueEnum::Dynamic(val), *val_ty)?;
}
}
Ok(())
}
/// See [`CodeGenerator::gen_setitem`].
pub fn gen_setitem<'ctx, G: CodeGenerator>(
generator: &mut G,
ctx: &mut CodeGenContext<'ctx, '_>,
target: &Expr<Option<Type>>,
key: &Expr<Option<Type>>,
value: ValueEnum<'ctx>,
value_ty: Type,
) -> Result<(), String> {
let target_ty = target.custom.unwrap();
let key_ty = key.custom.unwrap();
match &*ctx.unifier.get_ty(target_ty) {
TypeEnum::TObj { obj_id, params: list_params, .. }
if *obj_id == ctx.primitives.list.obj_id(&ctx.unifier).unwrap() =>
{
// Handle list item assignment
let llvm_usize = generator.get_size_type(ctx.ctx);
let target_item_ty = iter_type_vars(list_params).next().unwrap().ty;
let target = generator
.gen_expr(ctx, target)?
.unwrap()
.to_basic_value_enum(ctx, generator, target_ty)?
.into_pointer_value();
let target = ListValue::from_ptr_val(target, llvm_usize, None);
if let ExprKind::Slice { .. } = &key.node {
// Handle assigning to a slice
let ExprKind::Slice { lower, upper, step } = &key.node else { unreachable!() };
let Some((start, end, step)) = handle_slice_indices(
lower,
upper,
step,
ctx,
generator,
target.load_size(ctx, None),
)?
else {
return Ok(());
};
let value =
value.to_basic_value_enum(ctx, generator, value_ty)?.into_pointer_value();
let value = ListValue::from_ptr_val(value, llvm_usize, None);
let target_item_ty = ctx.get_llvm_type(generator, target_item_ty);
let Some(src_ind) = handle_slice_indices(
&None,
&None,
&None,
ctx,
generator,
value.load_size(ctx, None),
)?
else {
return Ok(());
};
list_slice_assignment(
generator,
ctx,
target_item_ty,
target,
(start, end, step),
value,
src_ind,
);
} else {
// Handle assigning to an index
let len = target.load_size(ctx, Some("len"));
let index = generator
.gen_expr(ctx, key)?
.unwrap()
.to_basic_value_enum(ctx, generator, key_ty)?
.into_int_value();
let index = ctx
.builder
.build_int_s_extend(index, generator.get_size_type(ctx.ctx), "sext")
.unwrap();
// handle negative index
let is_negative = ctx
.builder
.build_int_compare(
IntPredicate::SLT,
index,
generator.get_size_type(ctx.ctx).const_zero(),
"is_neg",
)
.unwrap();
let adjusted = ctx.builder.build_int_add(index, len, "adjusted").unwrap();
let index = ctx
.builder
.build_select(is_negative, adjusted, index, "index")
.map(BasicValueEnum::into_int_value)
.unwrap();
// unsigned less than is enough, because negative index after adjustment is
// bigger than the length (for unsigned cmp)
let bound_check = ctx
.builder
.build_int_compare(IntPredicate::ULT, index, len, "inbound")
.unwrap();
ctx.make_assert(
generator,
bound_check,
"0:IndexError",
"index {0} out of bounds 0:{1}",
[Some(index), Some(len), None],
key.location,
);
// Write value to index on list
let item_ptr =
target.data().ptr_offset(ctx, generator, &index, Some("list_item_ptr"));
let value = value.to_basic_value_enum(ctx, generator, value_ty)?;
ctx.builder.build_store(item_ptr, value).unwrap();
}
}
TypeEnum::TObj { obj_id, .. }
if *obj_id == ctx.primitives.ndarray.obj_id(&ctx.unifier).unwrap() =>
{
// Handle NDArray item assignment
todo!("ndarray subscript assignment is not yet implemented");
}
_ => {
panic!("encountered unknown target type: {}", ctx.unifier.stringify(target_ty));
}
}
Ok(())
}
/// See [`CodeGenerator::gen_for`]. /// See [`CodeGenerator::gen_for`].
pub fn gen_for<G: CodeGenerator>( pub fn gen_for<G: CodeGenerator>(
generator: &mut G, generator: &mut G,
@ -315,9 +431,6 @@ pub fn gen_for<G: CodeGenerator>(
let orelse_bb = let orelse_bb =
if orelse.is_empty() { cont_bb } else { ctx.ctx.append_basic_block(current, "for.orelse") }; if orelse.is_empty() { cont_bb } else { ctx.ctx.append_basic_block(current, "for.orelse") };
// Whether the iterable is a range() expression
let is_iterable_range_expr = ctx.unifier.unioned(iter.custom.unwrap(), ctx.primitives.range);
// The BB containing the increment expression // The BB containing the increment expression
let incr_bb = ctx.ctx.append_basic_block(current, "for.incr"); let incr_bb = ctx.ctx.append_basic_block(current, "for.incr");
// The BB containing the loop condition check // The BB containing the loop condition check
@ -326,113 +439,132 @@ pub fn gen_for<G: CodeGenerator>(
// store loop bb information and restore it later // store loop bb information and restore it later
let loop_bb = ctx.loop_target.replace((incr_bb, cont_bb)); let loop_bb = ctx.loop_target.replace((incr_bb, cont_bb));
let iter_ty = iter.custom.unwrap();
let iter_val = if let Some(v) = generator.gen_expr(ctx, iter)? { let iter_val = if let Some(v) = generator.gen_expr(ctx, iter)? {
v.to_basic_value_enum(ctx, generator, iter.custom.unwrap())? v.to_basic_value_enum(ctx, generator, iter_ty)?
} else { } else {
return Ok(()); return Ok(());
}; };
if is_iterable_range_expr {
let iter_val = RangeValue::from_ptr_val(iter_val.into_pointer_value(), Some("range"));
// Internal variable for loop; Cannot be assigned
let i = generator.gen_var_alloc(ctx, int32.into(), Some("for.i.addr"))?;
// Variable declared in "target" expression of the loop; Can be reassigned *or* shadowed
let Some(target_i) = generator.gen_store_target(ctx, target, Some("for.target.addr"))?
else {
unreachable!()
};
let (start, stop, step) = destructure_range(ctx, iter_val);
ctx.builder.build_store(i, start).unwrap();
// Check "If step is zero, ValueError is raised."
let rangenez =
ctx.builder.build_int_compare(IntPredicate::NE, step, int32.const_zero(), "").unwrap();
ctx.make_assert(
generator,
rangenez,
"ValueError",
"range() arg 3 must not be zero",
[None, None, None],
ctx.current_loc,
);
ctx.builder.build_unconditional_branch(cond_bb).unwrap();
match &*ctx.unifier.get_ty(iter_ty) {
TypeEnum::TObj { obj_id, .. }
if *obj_id == ctx.primitives.range.obj_id(&ctx.unifier).unwrap() =>
{ {
ctx.builder.position_at_end(cond_bb); let iter_val = RangeValue::from_ptr_val(iter_val.into_pointer_value(), Some("range"));
ctx.builder // Internal variable for loop; Cannot be assigned
.build_conditional_branch( let i = generator.gen_var_alloc(ctx, int32.into(), Some("for.i.addr"))?;
gen_in_range_check( // Variable declared in "target" expression of the loop; Can be reassigned *or* shadowed
ctx, let Some(target_i) =
ctx.builder.build_load(i, "").map(BasicValueEnum::into_int_value).unwrap(), generator.gen_store_target(ctx, target, Some("for.target.addr"))?
stop, else {
step, unreachable!()
), };
body_bb, let (start, stop, step) = destructure_range(ctx, iter_val);
orelse_bb,
ctx.builder.build_store(i, start).unwrap();
// Check "If step is zero, ValueError is raised."
let rangenez = ctx
.builder
.build_int_compare(IntPredicate::NE, step, int32.const_zero(), "")
.unwrap();
ctx.make_assert(
generator,
rangenez,
"ValueError",
"range() arg 3 must not be zero",
[None, None, None],
ctx.current_loc,
);
ctx.builder.build_unconditional_branch(cond_bb).unwrap();
{
ctx.builder.position_at_end(cond_bb);
ctx.builder
.build_conditional_branch(
gen_in_range_check(
ctx,
ctx.builder
.build_load(i, "")
.map(BasicValueEnum::into_int_value)
.unwrap(),
stop,
step,
),
body_bb,
orelse_bb,
)
.unwrap();
}
ctx.builder.position_at_end(incr_bb);
let next_i = ctx
.builder
.build_int_add(
ctx.builder.build_load(i, "").map(BasicValueEnum::into_int_value).unwrap(),
step,
"inc",
) )
.unwrap(); .unwrap();
ctx.builder.build_store(i, next_i).unwrap();
ctx.builder.build_unconditional_branch(cond_bb).unwrap();
ctx.builder.position_at_end(body_bb);
ctx.builder
.build_store(
target_i,
ctx.builder.build_load(i, "").map(BasicValueEnum::into_int_value).unwrap(),
)
.unwrap();
generator.gen_block(ctx, body.iter())?;
} }
TypeEnum::TObj { obj_id, params: list_params, .. }
if *obj_id == ctx.primitives.list.obj_id(&ctx.unifier).unwrap() =>
{
let index_addr = generator.gen_var_alloc(ctx, size_t.into(), Some("for.index.addr"))?;
ctx.builder.build_store(index_addr, size_t.const_zero()).unwrap();
let len = ctx
.build_gep_and_load(
iter_val.into_pointer_value(),
&[zero, int32.const_int(1, false)],
Some("len"),
)
.into_int_value();
ctx.builder.build_unconditional_branch(cond_bb).unwrap();
ctx.builder.position_at_end(incr_bb); ctx.builder.position_at_end(cond_bb);
let next_i = ctx let index = ctx
.builder .builder
.build_int_add( .build_load(index_addr, "for.index")
ctx.builder.build_load(i, "").map(BasicValueEnum::into_int_value).unwrap(), .map(BasicValueEnum::into_int_value)
step, .unwrap();
"inc", let cmp = ctx.builder.build_int_compare(IntPredicate::SLT, index, len, "cond").unwrap();
) ctx.builder.build_conditional_branch(cmp, body_bb, orelse_bb).unwrap();
.unwrap();
ctx.builder.build_store(i, next_i).unwrap();
ctx.builder.build_unconditional_branch(cond_bb).unwrap();
ctx.builder.position_at_end(body_bb); ctx.builder.position_at_end(incr_bb);
ctx.builder let index =
.build_store( ctx.builder.build_load(index_addr, "").map(BasicValueEnum::into_int_value).unwrap();
target_i, let inc = ctx.builder.build_int_add(index, size_t.const_int(1, true), "inc").unwrap();
ctx.builder.build_load(i, "").map(BasicValueEnum::into_int_value).unwrap(), ctx.builder.build_store(index_addr, inc).unwrap();
) ctx.builder.build_unconditional_branch(cond_bb).unwrap();
.unwrap();
generator.gen_block(ctx, body.iter())?;
} else {
let index_addr = generator.gen_var_alloc(ctx, size_t.into(), Some("for.index.addr"))?;
ctx.builder.build_store(index_addr, size_t.const_zero()).unwrap();
let len = ctx
.build_gep_and_load(
iter_val.into_pointer_value(),
&[zero, int32.const_int(1, false)],
Some("len"),
)
.into_int_value();
ctx.builder.build_unconditional_branch(cond_bb).unwrap();
ctx.builder.position_at_end(cond_bb); ctx.builder.position_at_end(body_bb);
let index = ctx let arr_ptr = ctx
.builder .build_gep_and_load(iter_val.into_pointer_value(), &[zero, zero], Some("arr.addr"))
.build_load(index_addr, "for.index") .into_pointer_value();
.map(BasicValueEnum::into_int_value) let index = ctx
.unwrap(); .builder
let cmp = ctx.builder.build_int_compare(IntPredicate::SLT, index, len, "cond").unwrap(); .build_load(index_addr, "for.index")
ctx.builder.build_conditional_branch(cmp, body_bb, orelse_bb).unwrap(); .map(BasicValueEnum::into_int_value)
.unwrap();
ctx.builder.position_at_end(incr_bb); let val = ctx.build_gep_and_load(arr_ptr, &[index], Some("val"));
let index = let val_ty = iter_type_vars(list_params).next().unwrap().ty;
ctx.builder.build_load(index_addr, "").map(BasicValueEnum::into_int_value).unwrap(); generator.gen_assign(ctx, target, val.into(), val_ty)?;
let inc = ctx.builder.build_int_add(index, size_t.const_int(1, true), "inc").unwrap(); generator.gen_block(ctx, body.iter())?;
ctx.builder.build_store(index_addr, inc).unwrap(); }
ctx.builder.build_unconditional_branch(cond_bb).unwrap(); _ => {
panic!("unsupported for loop iterator type: {}", ctx.unifier.stringify(iter_ty));
ctx.builder.position_at_end(body_bb); }
let arr_ptr = ctx
.build_gep_and_load(iter_val.into_pointer_value(), &[zero, zero], Some("arr.addr"))
.into_pointer_value();
let index = ctx
.builder
.build_load(index_addr, "for.index")
.map(BasicValueEnum::into_int_value)
.unwrap();
let val = ctx.build_gep_and_load(arr_ptr, &[index], Some("val"));
generator.gen_assign(ctx, target, val.into())?;
generator.gen_block(ctx, body.iter())?;
} }
for (k, (_, _, counter)) in &var_assignment { for (k, (_, _, counter)) in &var_assignment {
@ -1588,14 +1720,14 @@ pub fn gen_stmt<G: CodeGenerator>(
} }
StmtKind::AnnAssign { target, value, .. } => { StmtKind::AnnAssign { target, value, .. } => {
if let Some(value) = value { if let Some(value) = value {
let Some(value) = generator.gen_expr(ctx, value)? else { return Ok(()) }; let Some(value_enum) = generator.gen_expr(ctx, value)? else { return Ok(()) };
generator.gen_assign(ctx, target, value)?; generator.gen_assign(ctx, target, value_enum, value.custom.unwrap())?;
} }
} }
StmtKind::Assign { targets, value, .. } => { StmtKind::Assign { targets, value, .. } => {
let Some(value) = generator.gen_expr(ctx, value)? else { return Ok(()) }; let Some(value_enum) = generator.gen_expr(ctx, value)? else { return Ok(()) };
for target in targets { for target in targets {
generator.gen_assign(ctx, target, value.clone())?; generator.gen_assign(ctx, target, value_enum.clone(), value.custom.unwrap())?;
} }
} }
StmtKind::Continue { .. } => { StmtKind::Continue { .. } => {
@ -1609,15 +1741,16 @@ pub fn gen_stmt<G: CodeGenerator>(
StmtKind::For { .. } => generator.gen_for(ctx, stmt)?, StmtKind::For { .. } => generator.gen_for(ctx, stmt)?,
StmtKind::With { .. } => generator.gen_with(ctx, stmt)?, StmtKind::With { .. } => generator.gen_with(ctx, stmt)?,
StmtKind::AugAssign { target, op, value, .. } => { StmtKind::AugAssign { target, op, value, .. } => {
let value = gen_binop_expr( let value_enum = gen_binop_expr(
generator, generator,
ctx, ctx,
target, target,
Binop::aug_assign(*op), Binop::aug_assign(*op),
value, value,
stmt.location, stmt.location,
)?; )?
generator.gen_assign(ctx, target, value.unwrap())?; .unwrap();
generator.gen_assign(ctx, target, value_enum, value.custom.unwrap())?;
} }
StmtKind::Try { .. } => gen_try(generator, ctx, stmt)?, StmtKind::Try { .. } => gen_try(generator, ctx, stmt)?,
StmtKind::Raise { exc, .. } => { StmtKind::Raise { exc, .. } => {

7
nac3core/src/typecheck/function_check.rs
View File

@ -34,13 +34,18 @@ impl<'a> Inferencer<'a> {
self.should_have_value(pattern)?; self.should_have_value(pattern)?;
Ok(()) Ok(())
} }
ExprKind::Tuple { elts, .. } => { ExprKind::List { elts, .. } | ExprKind::Tuple { elts, .. } => {
for elt in elts { for elt in elts {
self.check_pattern(elt, defined_identifiers)?; self.check_pattern(elt, defined_identifiers)?;
self.should_have_value(elt)?; self.should_have_value(elt)?;
} }
Ok(()) Ok(())
} }
ExprKind::Starred { value, .. } => {
self.check_pattern(value, defined_identifiers)?;
self.should_have_value(value)?;
Ok(())
}
ExprKind::Subscript { value, slice, .. } => { ExprKind::Subscript { value, slice, .. } => {
self.check_expr(value, defined_identifiers)?; self.check_expr(value, defined_identifiers)?;
self.should_have_value(value)?; self.should_have_value(value)?;

827
nac3core/src/typecheck/type_inferencer/mod.rs
View File

File diff suppressed because it is too large Load Diff

66
nac3standalone/demo/src/assignment.py Normal file
View File

@ -0,0 +1,66 @@
@extern
def output_int32(x: int32):
...
@extern
def output_bool(x: bool):
...
def example1():
x, *ys, z = (1, 2, 3, 4, 5)
output_int32(x)
output_int32(ys[0])
output_int32(ys[1])
output_int32(ys[2])
output_int32(z)
def example2():
x, y, *zs = (1, 2, 3, 4, 5)
output_int32(x)
output_int32(y)
output_int32(zs[0])
output_int32(zs[1])
output_int32(zs[2])
def example3():
*xs, y, z = (1, 2, 3, 4, 5)
output_int32(xs[0])
output_int32(xs[1])
output_int32(xs[2])
output_int32(y)
output_int32(z)
def example4():
# Example from: https://docs.python.org/3/reference/simple_stmts.html#assignment-statements
x = [0, 1]
i = 0
i, x[i] = 1, 2 # i is updated, then x[i] is updated
output_int32(i)
output_int32(x[0])
output_int32(x[1])
class A:
value: int32
def __init__(self):
self.value = 1000
def example5():
ws = [88, 7, 8]
a = A()
x, [y, *ys, a.value], ws[0], (ws[0],) = 1, (2, False, 4, 5), 99, (6,)
output_int32(x)
output_int32(y)
output_bool(ys[0])
output_int32(ys[1])
output_int32(a.value)
output_int32(ws[0])
output_int32(ws[1])
output_int32(ws[2])
def run() -> int32:
example1()
example2()
example3()
example4()
example5()
return 0