forked from M-Labs/nac3
1080 lines
44 KiB
Rust
1080 lines
44 KiB
Rust
use super::{
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super::symbol_resolver::ValueEnum,
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expr::destructure_range,
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irrt::{handle_slice_indices, list_slice_assignment},
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CodeGenContext, CodeGenerator,
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};
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use crate::{
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codegen::expr::gen_binop_expr,
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toplevel::{DefinitionId, TopLevelDef},
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typecheck::typedef::{FunSignature, Type, TypeEnum},
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};
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use inkwell::{
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attributes::{Attribute, AttributeLoc},
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basic_block::BasicBlock,
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types::BasicTypeEnum,
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values::{BasicValue, BasicValueEnum, FunctionValue, PointerValue},
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IntPredicate::EQ,
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};
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use nac3parser::ast::{
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Constant, ExcepthandlerKind, Expr, ExprKind, Location, Stmt, StmtKind, StrRef,
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};
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use std::convert::TryFrom;
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pub fn gen_var<'ctx, 'a>(
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ctx: &mut CodeGenContext<'ctx, 'a>,
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ty: BasicTypeEnum<'ctx>,
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) -> Result<PointerValue<'ctx>, String> {
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// put the alloca in init block
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let current = ctx.builder.get_insert_block().unwrap();
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// position before the last branching instruction...
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ctx.builder.position_before(&ctx.init_bb.get_last_instruction().unwrap());
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let ptr = ctx.builder.build_alloca(ty, "tmp");
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ctx.builder.position_at_end(current);
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Ok(ptr)
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}
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pub fn gen_store_target<'ctx, 'a, G: CodeGenerator>(
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generator: &mut G,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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pattern: &Expr<Option<Type>>,
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) -> Result<PointerValue<'ctx>, String> {
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// very similar to gen_expr, but we don't do an extra load at the end
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// and we flatten nested tuples
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Ok(match &pattern.node {
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ExprKind::Name { id, .. } => {
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ctx.var_assignment.get(id).map(|v| Ok(v.0) as Result<_, String>).unwrap_or_else(
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|| {
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let ptr_ty = ctx.get_llvm_type(generator, pattern.custom.unwrap());
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let ptr = generator.gen_var_alloc(ctx, ptr_ty)?;
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ctx.var_assignment.insert(*id, (ptr, None, 0));
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Ok(ptr)
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},
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)?
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}
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ExprKind::Attribute { value, attr, .. } => {
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let index = ctx.get_attr_index(value.custom.unwrap(), *attr);
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let val = generator.gen_expr(ctx, value)?.unwrap().to_basic_value_enum(
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ctx,
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generator,
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value.custom.unwrap(),
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)?;
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let ptr = if let BasicValueEnum::PointerValue(v) = val {
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v
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} else {
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unreachable!();
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};
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unsafe {
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ctx.builder.build_in_bounds_gep(
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ptr,
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&[
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ctx.ctx.i32_type().const_zero(),
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ctx.ctx.i32_type().const_int(index as u64, false),
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],
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"attr",
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)
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}
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}
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ExprKind::Subscript { value, slice, .. } => {
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assert!(matches!(
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ctx.unifier.get_ty_immutable(value.custom.unwrap()).as_ref(),
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TypeEnum::TList { .. },
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));
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let i32_type = ctx.ctx.i32_type();
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let zero = i32_type.const_zero();
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let v = generator
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.gen_expr(ctx, value)?
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.unwrap()
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.to_basic_value_enum(ctx, generator, value.custom.unwrap())?
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.into_pointer_value();
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let len = ctx
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.build_gep_and_load(v, &[zero, i32_type.const_int(1, false)])
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.into_int_value();
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let raw_index = generator
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.gen_expr(ctx, slice)?
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.unwrap()
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.to_basic_value_enum(ctx, generator, slice.custom.unwrap())?
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.into_int_value();
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let raw_index = ctx.builder.build_int_s_extend(
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raw_index,
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generator.get_size_type(ctx.ctx),
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"sext",
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);
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// handle negative index
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let is_negative = ctx.builder.build_int_compare(
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inkwell::IntPredicate::SLT,
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raw_index,
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generator.get_size_type(ctx.ctx).const_zero(),
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"is_neg",
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);
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let adjusted = ctx.builder.build_int_add(raw_index, len, "adjusted");
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let index = ctx
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.builder
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.build_select(is_negative, adjusted, raw_index, "index")
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.into_int_value();
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// unsigned less than is enough, because negative index after adjustment is
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// bigger than the length (for unsigned cmp)
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let bound_check = ctx.builder.build_int_compare(
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inkwell::IntPredicate::ULT,
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index,
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len,
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"inbound",
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);
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ctx.make_assert(
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generator,
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bound_check,
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"0:IndexError",
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"index {0} out of bounds 0:{1}",
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[Some(raw_index), Some(len), None],
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slice.location,
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);
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unsafe {
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let arr_ptr = ctx
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.build_gep_and_load(v, &[i32_type.const_zero(), i32_type.const_zero()])
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.into_pointer_value();
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ctx.builder.build_gep(arr_ptr, &[index], "loadarrgep")
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}
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}
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_ => unreachable!(),
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})
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}
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pub fn gen_assign<'ctx, 'a, G: CodeGenerator>(
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generator: &mut G,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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target: &Expr<Option<Type>>,
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value: ValueEnum<'ctx>,
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) -> Result<(), String> {
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match &target.node {
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ExprKind::Tuple { elts, .. } => {
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if let BasicValueEnum::StructValue(v) =
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value.to_basic_value_enum(ctx, generator, target.custom.unwrap())?
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{
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for (i, elt) in elts.iter().enumerate() {
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let v = ctx
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.builder
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.build_extract_value(v, u32::try_from(i).unwrap(), "struct_elem")
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.unwrap();
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generator.gen_assign(ctx, elt, v.into())?;
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}
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} else {
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unreachable!()
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}
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}
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ExprKind::Subscript { value: ls, slice, .. }
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if matches!(&slice.node, ExprKind::Slice { .. }) =>
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{
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if let ExprKind::Slice { lower, upper, step } = &slice.node {
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let ls = generator
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.gen_expr(ctx, ls)?
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.unwrap()
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.to_basic_value_enum(ctx, generator, ls.custom.unwrap())?
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.into_pointer_value();
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let (start, end, step) =
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handle_slice_indices(lower, upper, step, ctx, generator, ls)?;
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let value = value
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.to_basic_value_enum(ctx, generator, target.custom.unwrap())?
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.into_pointer_value();
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let ty =
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if let TypeEnum::TList { ty } = &*ctx.unifier.get_ty(target.custom.unwrap()) {
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ctx.get_llvm_type(generator, *ty)
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} else {
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unreachable!()
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};
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let src_ind = handle_slice_indices(&None, &None, &None, ctx, generator, value)?;
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list_slice_assignment(generator, ctx, ty, ls, (start, end, step), value, src_ind)
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} else {
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unreachable!()
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}
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}
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_ => {
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let ptr = generator.gen_store_target(ctx, target)?;
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if let ExprKind::Name { id, .. } = &target.node {
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let (_, static_value, counter) = ctx.var_assignment.get_mut(id).unwrap();
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*counter += 1;
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if let ValueEnum::Static(s) = &value {
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*static_value = Some(s.clone());
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}
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}
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let val = value.to_basic_value_enum(ctx, generator, target.custom.unwrap())?;
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ctx.builder.build_store(ptr, val);
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}
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};
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Ok(())
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}
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pub fn gen_for<'ctx, 'a, G: CodeGenerator>(
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generator: &mut G,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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stmt: &Stmt<Option<Type>>,
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) -> Result<(), String> {
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if let StmtKind::For { iter, target, body, orelse, .. } = &stmt.node {
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// var_assignment static values may be changed in another branch
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// if so, remove the static value as it may not be correct in this branch
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let var_assignment = ctx.var_assignment.clone();
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let int32 = ctx.ctx.i32_type();
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let size_t = generator.get_size_type(ctx.ctx);
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let zero = int32.const_zero();
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let current = ctx.builder.get_insert_block().unwrap().get_parent().unwrap();
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let test_bb = ctx.ctx.append_basic_block(current, "test");
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let body_bb = ctx.ctx.append_basic_block(current, "body");
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let cont_bb = ctx.ctx.append_basic_block(current, "cont");
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// if there is no orelse, we just go to cont_bb
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let orelse_bb =
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if orelse.is_empty() { cont_bb } else { ctx.ctx.append_basic_block(current, "orelse") };
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// store loop bb information and restore it later
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let loop_bb = ctx.loop_target.replace((test_bb, cont_bb));
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let iter_val = generator.gen_expr(ctx, iter)?.unwrap().to_basic_value_enum(
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ctx,
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generator,
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iter.custom.unwrap(),
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)?;
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if ctx.unifier.unioned(iter.custom.unwrap(), ctx.primitives.range) {
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// setup
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let iter_val = iter_val.into_pointer_value();
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let i = generator.gen_var_alloc(ctx, int32.into())?;
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let user_i = generator.gen_store_target(ctx, target)?;
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let (start, end, step) = destructure_range(ctx, iter_val);
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ctx.builder.build_store(i, ctx.builder.build_int_sub(start, step, "start_init"));
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ctx.builder.build_unconditional_branch(test_bb);
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ctx.builder.position_at_end(test_bb);
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let sign = ctx.builder.build_int_compare(
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inkwell::IntPredicate::SGT,
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step,
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int32.const_zero(),
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"sign",
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);
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// add and test
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let tmp = ctx.builder.build_int_add(
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ctx.builder.build_load(i, "i").into_int_value(),
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step,
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"start_loop",
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);
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ctx.builder.build_store(i, tmp);
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ctx.builder.build_store(user_i, tmp);
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// // if step > 0, continue when i < end
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let cmp1 = ctx.builder.build_int_compare(inkwell::IntPredicate::SLT, tmp, end, "cmp1");
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// if step < 0, continue when i > end
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let cmp2 = ctx.builder.build_int_compare(inkwell::IntPredicate::SGT, tmp, end, "cmp2");
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let pos = ctx.builder.build_and(sign, cmp1, "pos");
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let neg = ctx.builder.build_and(ctx.builder.build_not(sign, "inv"), cmp2, "neg");
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ctx.builder.build_conditional_branch(
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ctx.builder.build_or(pos, neg, "or"),
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body_bb,
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orelse_bb,
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);
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ctx.builder.position_at_end(body_bb);
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} else {
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let counter = generator.gen_var_alloc(ctx, size_t.into())?;
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// counter = -1
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ctx.builder.build_store(counter, size_t.const_int(u64::max_value(), true));
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let len = ctx
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.build_gep_and_load(
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iter_val.into_pointer_value(),
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&[zero, int32.const_int(1, false)],
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)
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.into_int_value();
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ctx.builder.build_unconditional_branch(test_bb);
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ctx.builder.position_at_end(test_bb);
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let tmp = ctx.builder.build_load(counter, "i").into_int_value();
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let tmp = ctx.builder.build_int_add(tmp, size_t.const_int(1, false), "inc");
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ctx.builder.build_store(counter, tmp);
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let cmp = ctx.builder.build_int_compare(inkwell::IntPredicate::SLT, tmp, len, "cmp");
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ctx.builder.build_conditional_branch(cmp, body_bb, orelse_bb);
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ctx.builder.position_at_end(body_bb);
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let arr_ptr = ctx
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.build_gep_and_load(iter_val.into_pointer_value(), &[zero, zero])
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.into_pointer_value();
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let val = ctx.build_gep_and_load(arr_ptr, &[tmp]);
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generator.gen_assign(ctx, target, val.into())?;
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}
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gen_block(generator, ctx, body.iter())?;
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for (k, (_, _, counter)) in var_assignment.iter() {
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let (_, static_val, counter2) = ctx.var_assignment.get_mut(k).unwrap();
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if counter != counter2 {
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*static_val = None;
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}
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}
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if !ctx.is_terminated() {
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ctx.builder.build_unconditional_branch(test_bb);
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}
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if !orelse.is_empty() {
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ctx.builder.position_at_end(orelse_bb);
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gen_block(generator, ctx, orelse.iter())?;
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if !ctx.is_terminated() {
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ctx.builder.build_unconditional_branch(cont_bb);
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}
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}
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for (k, (_, _, counter)) in var_assignment.iter() {
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let (_, static_val, counter2) = ctx.var_assignment.get_mut(k).unwrap();
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if counter != counter2 {
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*static_val = None;
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}
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}
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ctx.builder.position_at_end(cont_bb);
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ctx.loop_target = loop_bb;
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} else {
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unreachable!()
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}
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Ok(())
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}
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pub fn gen_while<'ctx, 'a, G: CodeGenerator>(
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generator: &mut G,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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stmt: &Stmt<Option<Type>>,
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) -> Result<(), String> {
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if let StmtKind::While { test, body, orelse, .. } = &stmt.node {
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// var_assignment static values may be changed in another branch
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// if so, remove the static value as it may not be correct in this branch
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let var_assignment = ctx.var_assignment.clone();
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let current = ctx.builder.get_insert_block().unwrap().get_parent().unwrap();
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let test_bb = ctx.ctx.append_basic_block(current, "test");
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let body_bb = ctx.ctx.append_basic_block(current, "body");
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let cont_bb = ctx.ctx.append_basic_block(current, "cont");
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// if there is no orelse, we just go to cont_bb
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let orelse_bb =
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if orelse.is_empty() { cont_bb } else { ctx.ctx.append_basic_block(current, "orelse") };
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// store loop bb information and restore it later
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let loop_bb = ctx.loop_target.replace((test_bb, cont_bb));
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ctx.builder.build_unconditional_branch(test_bb);
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ctx.builder.position_at_end(test_bb);
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let test = generator.gen_expr(ctx, test)?.unwrap().to_basic_value_enum(
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ctx,
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generator,
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test.custom.unwrap(),
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)?;
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if let BasicValueEnum::IntValue(test) = test {
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ctx.builder.build_conditional_branch(test, body_bb, orelse_bb);
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} else {
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unreachable!()
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};
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ctx.builder.position_at_end(body_bb);
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gen_block(generator, ctx, body.iter())?;
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for (k, (_, _, counter)) in var_assignment.iter() {
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let (_, static_val, counter2) = ctx.var_assignment.get_mut(k).unwrap();
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if counter != counter2 {
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*static_val = None;
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}
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}
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if !ctx.is_terminated() {
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ctx.builder.build_unconditional_branch(test_bb);
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}
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if !orelse.is_empty() {
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ctx.builder.position_at_end(orelse_bb);
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gen_block(generator, ctx, orelse.iter())?;
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if !ctx.is_terminated() {
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ctx.builder.build_unconditional_branch(cont_bb);
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}
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}
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for (k, (_, _, counter)) in var_assignment.iter() {
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let (_, static_val, counter2) = ctx.var_assignment.get_mut(k).unwrap();
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if counter != counter2 {
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*static_val = None;
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}
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}
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ctx.builder.position_at_end(cont_bb);
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ctx.loop_target = loop_bb;
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} else {
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unreachable!()
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}
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Ok(())
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}
|
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pub fn gen_if<'ctx, 'a, G: CodeGenerator>(
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generator: &mut G,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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stmt: &Stmt<Option<Type>>,
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) -> Result<(), String> {
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if let StmtKind::If { test, body, orelse, .. } = &stmt.node {
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// var_assignment static values may be changed in another branch
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// if so, remove the static value as it may not be correct in this branch
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let var_assignment = ctx.var_assignment.clone();
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let current = ctx.builder.get_insert_block().unwrap().get_parent().unwrap();
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let test_bb = ctx.ctx.append_basic_block(current, "test");
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let body_bb = ctx.ctx.append_basic_block(current, "body");
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let mut cont_bb = None;
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// if there is no orelse, we just go to cont_bb
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let orelse_bb = if orelse.is_empty() {
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cont_bb = Some(ctx.ctx.append_basic_block(current, "cont"));
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cont_bb.unwrap()
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} else {
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ctx.ctx.append_basic_block(current, "orelse")
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};
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ctx.builder.build_unconditional_branch(test_bb);
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ctx.builder.position_at_end(test_bb);
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let test = generator.gen_expr(ctx, test)?.unwrap().to_basic_value_enum(
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ctx,
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generator,
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test.custom.unwrap(),
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)?;
|
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if let BasicValueEnum::IntValue(test) = test {
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ctx.builder.build_conditional_branch(test, body_bb, orelse_bb);
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} else {
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unreachable!()
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};
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ctx.builder.position_at_end(body_bb);
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gen_block(generator, ctx, body.iter())?;
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for (k, (_, _, counter)) in var_assignment.iter() {
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let (_, static_val, counter2) = ctx.var_assignment.get_mut(k).unwrap();
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if counter != counter2 {
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*static_val = None;
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}
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}
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if !ctx.is_terminated() {
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if cont_bb.is_none() {
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cont_bb = Some(ctx.ctx.append_basic_block(current, "cont"));
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}
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ctx.builder.build_unconditional_branch(cont_bb.unwrap());
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}
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if !orelse.is_empty() {
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ctx.builder.position_at_end(orelse_bb);
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gen_block(generator, ctx, orelse.iter())?;
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if !ctx.is_terminated() {
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if cont_bb.is_none() {
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cont_bb = Some(ctx.ctx.append_basic_block(current, "cont"));
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}
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ctx.builder.build_unconditional_branch(cont_bb.unwrap());
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}
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}
|
|
if let Some(cont_bb) = cont_bb {
|
|
ctx.builder.position_at_end(cont_bb);
|
|
}
|
|
for (k, (_, _, counter)) in var_assignment.iter() {
|
|
let (_, static_val, counter2) = ctx.var_assignment.get_mut(k).unwrap();
|
|
if counter != counter2 {
|
|
*static_val = None;
|
|
}
|
|
}
|
|
} else {
|
|
unreachable!()
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
pub fn final_proxy<'ctx, 'a>(
|
|
ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
target: BasicBlock<'ctx>,
|
|
block: BasicBlock<'ctx>,
|
|
final_data: &mut (PointerValue, Vec<BasicBlock<'ctx>>, Vec<BasicBlock<'ctx>>),
|
|
) {
|
|
let (final_state, final_targets, final_paths) = final_data;
|
|
let prev = ctx.builder.get_insert_block().unwrap();
|
|
ctx.builder.position_at_end(block);
|
|
unsafe {
|
|
ctx.builder.build_store(*final_state, target.get_address().unwrap());
|
|
}
|
|
ctx.builder.position_at_end(prev);
|
|
final_targets.push(target);
|
|
final_paths.push(block);
|
|
}
|
|
|
|
pub fn get_builtins<'ctx, 'a>(
|
|
generator: &mut dyn CodeGenerator,
|
|
ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
symbol: &str,
|
|
) -> FunctionValue<'ctx> {
|
|
ctx.module.get_function(symbol).unwrap_or_else(|| {
|
|
let ty = match symbol {
|
|
"__nac3_raise" => ctx
|
|
.ctx
|
|
.void_type()
|
|
.fn_type(&[ctx.get_llvm_type(generator, ctx.primitives.exception).into()], false),
|
|
"__nac3_resume" => ctx.ctx.void_type().fn_type(&[], false),
|
|
"__nac3_end_catch" => ctx.ctx.void_type().fn_type(&[], false),
|
|
_ => unimplemented!(),
|
|
};
|
|
let fun = ctx.module.add_function(symbol, ty, None);
|
|
if symbol == "__nac3_raise" || symbol == "__nac3_resume" {
|
|
fun.add_attribute(
|
|
AttributeLoc::Function,
|
|
ctx.ctx.create_enum_attribute(Attribute::get_named_enum_kind_id("noreturn"), 0),
|
|
);
|
|
}
|
|
fun
|
|
})
|
|
}
|
|
|
|
pub fn exn_constructor<'ctx, 'a>(
|
|
ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
obj: Option<(Type, ValueEnum<'ctx>)>,
|
|
_fun: (&FunSignature, DefinitionId),
|
|
mut args: Vec<(Option<StrRef>, ValueEnum<'ctx>)>,
|
|
generator: &mut dyn CodeGenerator,
|
|
) -> Result<Option<BasicValueEnum<'ctx>>, String> {
|
|
let (zelf_ty, zelf) = obj.unwrap();
|
|
let zelf = zelf.to_basic_value_enum(ctx, generator, zelf_ty)?.into_pointer_value();
|
|
let int32 = ctx.ctx.i32_type();
|
|
let zero = int32.const_zero();
|
|
let zelf_id = {
|
|
if let TypeEnum::TObj { obj_id, .. } = &*ctx.unifier.get_ty(zelf_ty) {
|
|
obj_id.0
|
|
} else {
|
|
unreachable!()
|
|
}
|
|
};
|
|
let defs = ctx.top_level.definitions.read();
|
|
let def = defs[zelf_id].read();
|
|
let zelf_name =
|
|
if let TopLevelDef::Class { name, .. } = &*def { *name } else { unreachable!() };
|
|
let exception_name = format!("{}:{}", ctx.resolver.get_exception_id(zelf_id), zelf_name);
|
|
unsafe {
|
|
let id_ptr = ctx.builder.build_in_bounds_gep(zelf, &[zero, zero], "exn.id");
|
|
let id = ctx.resolver.get_string_id(&exception_name);
|
|
ctx.builder.build_store(id_ptr, int32.const_int(id as u64, false));
|
|
let empty_string = ctx.gen_const(generator, &Constant::Str("".into()), ctx.primitives.str);
|
|
let ptr =
|
|
ctx.builder.build_in_bounds_gep(zelf, &[zero, int32.const_int(5, false)], "exn.msg");
|
|
let msg = if !args.is_empty() {
|
|
args.remove(0).1.to_basic_value_enum(ctx, generator, ctx.primitives.str)?
|
|
} else {
|
|
empty_string
|
|
};
|
|
ctx.builder.build_store(ptr, msg);
|
|
for i in [6, 7, 8].iter() {
|
|
let value = if !args.is_empty() {
|
|
args.remove(0).1.to_basic_value_enum(ctx, generator, ctx.primitives.int64)?
|
|
} else {
|
|
ctx.ctx.i64_type().const_zero().into()
|
|
};
|
|
let ptr = ctx.builder.build_in_bounds_gep(
|
|
zelf,
|
|
&[zero, int32.const_int(*i, false)],
|
|
"exn.param",
|
|
);
|
|
ctx.builder.build_store(ptr, value);
|
|
}
|
|
// set file, func to empty string
|
|
for i in [1, 4].iter() {
|
|
let ptr = ctx.builder.build_in_bounds_gep(
|
|
zelf,
|
|
&[zero, int32.const_int(*i, false)],
|
|
"exn.str",
|
|
);
|
|
ctx.builder.build_store(ptr, empty_string);
|
|
}
|
|
// set ints to zero
|
|
for i in [2, 3].iter() {
|
|
let ptr = ctx.builder.build_in_bounds_gep(
|
|
zelf,
|
|
&[zero, int32.const_int(*i, false)],
|
|
"exn.ints",
|
|
);
|
|
ctx.builder.build_store(ptr, zero);
|
|
}
|
|
}
|
|
Ok(Some(zelf.into()))
|
|
}
|
|
|
|
pub fn gen_raise<'ctx, 'a>(
|
|
generator: &mut dyn CodeGenerator,
|
|
ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
exception: Option<&BasicValueEnum<'ctx>>,
|
|
loc: Location,
|
|
) {
|
|
if let Some(exception) = exception {
|
|
unsafe {
|
|
let int32 = ctx.ctx.i32_type();
|
|
let zero = int32.const_zero();
|
|
let exception = exception.into_pointer_value();
|
|
let file_ptr = ctx.builder.build_in_bounds_gep(
|
|
exception,
|
|
&[zero, int32.const_int(1, false)],
|
|
"file_ptr",
|
|
);
|
|
let filename = ctx.gen_string(generator, loc.file.0);
|
|
ctx.builder.build_store(file_ptr, filename);
|
|
let row_ptr = ctx.builder.build_in_bounds_gep(
|
|
exception,
|
|
&[zero, int32.const_int(2, false)],
|
|
"row_ptr",
|
|
);
|
|
ctx.builder.build_store(row_ptr, int32.const_int(loc.row as u64, false));
|
|
let col_ptr = ctx.builder.build_in_bounds_gep(
|
|
exception,
|
|
&[zero, int32.const_int(3, false)],
|
|
"col_ptr",
|
|
);
|
|
ctx.builder.build_store(col_ptr, int32.const_int(loc.column as u64, false));
|
|
|
|
let current_fun = ctx.builder.get_insert_block().unwrap().get_parent().unwrap();
|
|
let fun_name = ctx.gen_string(generator, current_fun.get_name().to_str().unwrap());
|
|
let name_ptr = ctx.builder.build_in_bounds_gep(
|
|
exception,
|
|
&[zero, int32.const_int(4, false)],
|
|
"name_ptr",
|
|
);
|
|
ctx.builder.build_store(name_ptr, fun_name);
|
|
}
|
|
|
|
let raise = get_builtins(generator, ctx, "__nac3_raise");
|
|
let exception = *exception;
|
|
ctx.build_call_or_invoke(raise, &[exception], "raise");
|
|
} else {
|
|
let resume = get_builtins(generator, ctx, "__nac3_resume");
|
|
ctx.build_call_or_invoke(resume, &[], "resume");
|
|
}
|
|
ctx.builder.build_unreachable();
|
|
}
|
|
|
|
pub fn gen_try<'ctx, 'a, G: CodeGenerator>(
|
|
generator: &mut G,
|
|
ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
target: &Stmt<Option<Type>>,
|
|
) -> Result<(), String> {
|
|
if let StmtKind::Try { body, handlers, orelse, finalbody, .. } = &target.node {
|
|
// if we need to generate anything related to exception, we must have personality defined
|
|
let personality_symbol = ctx.top_level.personality_symbol.as_ref().unwrap();
|
|
let personality = ctx.module.get_function(personality_symbol).unwrap_or_else(|| {
|
|
let ty = ctx.ctx.i32_type().fn_type(&[], true);
|
|
ctx.module.add_function(personality_symbol, ty, None)
|
|
});
|
|
let exception_type = ctx.get_llvm_type(generator, ctx.primitives.exception);
|
|
let ptr_type = ctx.ctx.i8_type().ptr_type(inkwell::AddressSpace::Generic);
|
|
let current_block = ctx.builder.get_insert_block().unwrap();
|
|
let current_fun = current_block.get_parent().unwrap();
|
|
let landingpad = ctx.ctx.append_basic_block(current_fun, "try.landingpad");
|
|
let dispatcher = ctx.ctx.append_basic_block(current_fun, "try.dispatch");
|
|
let mut dispatcher_end = dispatcher;
|
|
ctx.builder.position_at_end(dispatcher);
|
|
let exn = ctx.builder.build_phi(exception_type, "exn");
|
|
ctx.builder.position_at_end(current_block);
|
|
|
|
let mut cleanup = None;
|
|
let mut old_loop_target = None;
|
|
let mut old_return = None;
|
|
let mut final_data = None;
|
|
let has_cleanup = !finalbody.is_empty();
|
|
if has_cleanup {
|
|
let final_state = generator.gen_var_alloc(ctx, ptr_type.into())?;
|
|
final_data = Some((final_state, Vec::new(), Vec::new()));
|
|
if let Some((continue_target, break_target)) = ctx.loop_target {
|
|
let break_proxy = ctx.ctx.append_basic_block(current_fun, "try.break");
|
|
let continue_proxy = ctx.ctx.append_basic_block(current_fun, "try.continue");
|
|
final_proxy(ctx, break_target, break_proxy, final_data.as_mut().unwrap());
|
|
final_proxy(ctx, continue_target, continue_proxy, final_data.as_mut().unwrap());
|
|
old_loop_target = ctx.loop_target.replace((continue_proxy, break_proxy));
|
|
}
|
|
let return_proxy = ctx.ctx.append_basic_block(current_fun, "try.return");
|
|
if let Some(return_target) = ctx.return_target {
|
|
final_proxy(ctx, return_target, return_proxy, final_data.as_mut().unwrap());
|
|
} else {
|
|
let return_target = ctx.ctx.append_basic_block(current_fun, "try.return_target");
|
|
ctx.builder.position_at_end(return_target);
|
|
let return_value = ctx.return_buffer.map(|v| ctx.builder.build_load(v, "$ret"));
|
|
ctx.builder.build_return(return_value.as_ref().map(|v| v as &dyn BasicValue));
|
|
ctx.builder.position_at_end(current_block);
|
|
final_proxy(ctx, return_target, return_proxy, final_data.as_mut().unwrap());
|
|
}
|
|
old_return = ctx.return_target.replace(return_proxy);
|
|
cleanup = Some(ctx.ctx.append_basic_block(current_fun, "try.cleanup"));
|
|
}
|
|
|
|
let mut clauses = Vec::new();
|
|
let mut found_catch_all = false;
|
|
for handler_node in handlers.iter() {
|
|
let ExcepthandlerKind::ExceptHandler { type_, .. } = &handler_node.node;
|
|
// none or Exception
|
|
if type_.is_none()
|
|
|| ctx
|
|
.unifier
|
|
.unioned(type_.as_ref().unwrap().custom.unwrap(), ctx.primitives.exception)
|
|
{
|
|
clauses.push(None);
|
|
found_catch_all = true;
|
|
break;
|
|
} else {
|
|
let type_ = type_.as_ref().unwrap();
|
|
let exn_name = ctx.resolver.get_type_name(
|
|
&ctx.top_level.definitions.read(),
|
|
&mut ctx.unifier,
|
|
type_.custom.unwrap(),
|
|
);
|
|
let obj_id = if let TypeEnum::TObj { obj_id, .. } = &*ctx.unifier.get_ty(type_.custom.unwrap()) {
|
|
*obj_id
|
|
} else {
|
|
unreachable!()
|
|
};
|
|
let exception_name = format!("{}:{}", ctx.resolver.get_exception_id(obj_id.0), exn_name);
|
|
let exn_id = ctx.resolver.get_string_id(&exception_name);
|
|
let exn_id_global =
|
|
ctx.module.add_global(ctx.ctx.i32_type(), None, &format!("exn.{}", exn_id));
|
|
exn_id_global.set_initializer(&ctx.ctx.i32_type().const_int(exn_id as u64, false));
|
|
clauses.push(Some(exn_id_global.as_pointer_value().as_basic_value_enum()));
|
|
}
|
|
}
|
|
let mut all_clauses = clauses.clone();
|
|
if let Some(old_clauses) = &ctx.outer_catch_clauses {
|
|
if !found_catch_all {
|
|
all_clauses.extend_from_slice(&old_clauses.0)
|
|
}
|
|
}
|
|
let old_clauses = ctx.outer_catch_clauses.replace((all_clauses, dispatcher, exn));
|
|
let old_unwind = ctx.unwind_target.replace(landingpad);
|
|
gen_block(generator, ctx, body.iter())?;
|
|
if ctx.builder.get_insert_block().unwrap().get_terminator().is_none() {
|
|
gen_block(generator, ctx, orelse.iter())?;
|
|
}
|
|
let body = ctx.builder.get_insert_block().unwrap();
|
|
// reset old_clauses and old_unwind
|
|
let (all_clauses, _, _) = ctx.outer_catch_clauses.take().unwrap();
|
|
ctx.outer_catch_clauses = old_clauses;
|
|
ctx.unwind_target = old_unwind;
|
|
ctx.return_target = old_return;
|
|
ctx.loop_target = old_loop_target;
|
|
old_loop_target = None;
|
|
|
|
let old_unwind = if !finalbody.is_empty() {
|
|
let final_landingpad = ctx.ctx.append_basic_block(current_fun, "try.catch.final");
|
|
ctx.builder.position_at_end(final_landingpad);
|
|
ctx.builder.build_landing_pad(
|
|
ctx.ctx.struct_type(&[ptr_type.into(), exception_type], false),
|
|
personality,
|
|
&[],
|
|
true,
|
|
"try.catch.final",
|
|
);
|
|
ctx.builder.build_unconditional_branch(cleanup.unwrap());
|
|
ctx.builder.position_at_end(body);
|
|
ctx.unwind_target.replace(final_landingpad)
|
|
} else {
|
|
None
|
|
};
|
|
|
|
// run end_catch before continue/break/return
|
|
let mut final_proxy_lambda =
|
|
|ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
target: BasicBlock<'ctx>,
|
|
block: BasicBlock<'ctx>| final_proxy(ctx, target, block, final_data.as_mut().unwrap());
|
|
let mut redirect_lambda = |ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
target: BasicBlock<'ctx>,
|
|
block: BasicBlock<'ctx>| {
|
|
ctx.builder.position_at_end(block);
|
|
ctx.builder.build_unconditional_branch(target);
|
|
ctx.builder.position_at_end(body);
|
|
};
|
|
let redirect = if has_cleanup {
|
|
&mut final_proxy_lambda
|
|
as &mut dyn FnMut(&mut CodeGenContext<'ctx, 'a>, BasicBlock<'ctx>, BasicBlock<'ctx>)
|
|
} else {
|
|
&mut redirect_lambda
|
|
as &mut dyn FnMut(&mut CodeGenContext<'ctx, 'a>, BasicBlock<'ctx>, BasicBlock<'ctx>)
|
|
};
|
|
let resume = get_builtins(generator, ctx, "__nac3_resume");
|
|
let end_catch = get_builtins(generator, ctx, "__nac3_end_catch");
|
|
if let Some((continue_target, break_target)) = ctx.loop_target.take() {
|
|
let break_proxy = ctx.ctx.append_basic_block(current_fun, "try.break");
|
|
let continue_proxy = ctx.ctx.append_basic_block(current_fun, "try.continue");
|
|
ctx.builder.position_at_end(break_proxy);
|
|
ctx.builder.build_call(end_catch, &[], "end_catch");
|
|
ctx.builder.position_at_end(continue_proxy);
|
|
ctx.builder.build_call(end_catch, &[], "end_catch");
|
|
ctx.builder.position_at_end(body);
|
|
redirect(ctx, break_target, break_proxy);
|
|
redirect(ctx, continue_target, continue_proxy);
|
|
ctx.loop_target = Some((continue_proxy, break_proxy));
|
|
old_loop_target = Some((continue_target, break_target));
|
|
}
|
|
let return_proxy = ctx.ctx.append_basic_block(current_fun, "try.return");
|
|
ctx.builder.position_at_end(return_proxy);
|
|
ctx.builder.build_call(end_catch, &[], "end_catch");
|
|
let return_target = ctx.return_target.take().unwrap_or_else(|| {
|
|
let doreturn = ctx.ctx.append_basic_block(current_fun, "try.doreturn");
|
|
ctx.builder.position_at_end(doreturn);
|
|
let return_value = ctx.return_buffer.map(|v| ctx.builder.build_load(v, "$ret"));
|
|
ctx.builder.build_return(return_value.as_ref().map(|v| v as &dyn BasicValue));
|
|
doreturn
|
|
});
|
|
redirect(ctx, return_target, return_proxy);
|
|
ctx.return_target = Some(return_proxy);
|
|
old_return = Some(return_target);
|
|
|
|
let mut post_handlers = Vec::new();
|
|
|
|
let exnid = if !handlers.is_empty() {
|
|
ctx.builder.position_at_end(dispatcher);
|
|
unsafe {
|
|
let zero = ctx.ctx.i32_type().const_zero();
|
|
let exnid_ptr = ctx.builder.build_gep(
|
|
exn.as_basic_value().into_pointer_value(),
|
|
&[zero, zero],
|
|
"exnidptr",
|
|
);
|
|
Some(ctx.builder.build_load(exnid_ptr, "exnid"))
|
|
}
|
|
} else {
|
|
None
|
|
};
|
|
|
|
for (handler_node, exn_type) in handlers.iter().zip(clauses.iter()) {
|
|
let ExcepthandlerKind::ExceptHandler { type_, name, body } = &handler_node.node;
|
|
let handler_bb = ctx.ctx.append_basic_block(current_fun, "try.handler");
|
|
ctx.builder.position_at_end(handler_bb);
|
|
if let Some(name) = name {
|
|
let exn_ty = ctx.get_llvm_type(generator, type_.as_ref().unwrap().custom.unwrap());
|
|
let exn_store = generator.gen_var_alloc(ctx, exn_ty)?;
|
|
ctx.var_assignment.insert(*name, (exn_store, None, 0));
|
|
ctx.builder.build_store(exn_store, exn.as_basic_value());
|
|
}
|
|
gen_block(generator, ctx, body.iter())?;
|
|
let current = ctx.builder.get_insert_block().unwrap();
|
|
// only need to call end catch if not terminated
|
|
// otherwise, we already handled in return/break/continue/raise
|
|
if current.get_terminator().is_none() {
|
|
ctx.builder.build_call(end_catch, &[], "end_catch");
|
|
}
|
|
post_handlers.push(current);
|
|
ctx.builder.position_at_end(dispatcher_end);
|
|
if let Some(exn_type) = exn_type {
|
|
let dispatcher_cont =
|
|
ctx.ctx.append_basic_block(current_fun, "try.dispatcher_cont");
|
|
let actual_id = exnid.unwrap().into_int_value();
|
|
let expected_id = ctx
|
|
.builder
|
|
.build_load(exn_type.into_pointer_value(), "expected_id")
|
|
.into_int_value();
|
|
let result = ctx.builder.build_int_compare(EQ, actual_id, expected_id, "exncheck");
|
|
ctx.builder.build_conditional_branch(result, handler_bb, dispatcher_cont);
|
|
dispatcher_end = dispatcher_cont;
|
|
} else {
|
|
ctx.builder.build_unconditional_branch(handler_bb);
|
|
break;
|
|
}
|
|
}
|
|
|
|
ctx.unwind_target = old_unwind;
|
|
ctx.loop_target = old_loop_target;
|
|
ctx.return_target = old_return;
|
|
|
|
ctx.builder.position_at_end(landingpad);
|
|
let clauses: Vec<_> = if finalbody.is_empty() { &all_clauses } else { &clauses }
|
|
.iter()
|
|
.map(|v| v.unwrap_or(ptr_type.const_zero().into()))
|
|
.collect();
|
|
let landingpad_value = ctx
|
|
.builder
|
|
.build_landing_pad(
|
|
ctx.ctx.struct_type(&[ptr_type.into(), exception_type], false),
|
|
personality,
|
|
&clauses,
|
|
has_cleanup,
|
|
"try.landingpad",
|
|
)
|
|
.into_struct_value();
|
|
let exn_val = ctx.builder.build_extract_value(landingpad_value, 1, "exn").unwrap();
|
|
ctx.builder.build_unconditional_branch(dispatcher);
|
|
exn.add_incoming(&[(&exn_val, landingpad)]);
|
|
|
|
if dispatcher_end.get_terminator().is_none() {
|
|
ctx.builder.position_at_end(dispatcher_end);
|
|
if let Some(cleanup) = cleanup {
|
|
ctx.builder.build_unconditional_branch(cleanup);
|
|
} else if let Some((_, outer_dispatcher, phi)) = ctx.outer_catch_clauses {
|
|
phi.add_incoming(&[(&exn_val, dispatcher_end)]);
|
|
ctx.builder.build_unconditional_branch(outer_dispatcher);
|
|
} else {
|
|
ctx.build_call_or_invoke(resume, &[], "resume");
|
|
ctx.builder.build_unreachable();
|
|
}
|
|
}
|
|
|
|
if finalbody.is_empty() {
|
|
let tail = ctx.ctx.append_basic_block(current_fun, "try.tail");
|
|
if body.get_terminator().is_none() {
|
|
ctx.builder.position_at_end(body);
|
|
ctx.builder.build_unconditional_branch(tail);
|
|
}
|
|
if matches!(cleanup, Some(cleanup) if cleanup.get_terminator().is_none()) {
|
|
ctx.builder.position_at_end(cleanup.unwrap());
|
|
ctx.builder.build_unconditional_branch(tail);
|
|
}
|
|
for post_handler in post_handlers {
|
|
if post_handler.get_terminator().is_none() {
|
|
ctx.builder.position_at_end(post_handler);
|
|
ctx.builder.build_unconditional_branch(tail);
|
|
}
|
|
}
|
|
ctx.builder.position_at_end(tail);
|
|
} else {
|
|
// exception path
|
|
let cleanup = cleanup.unwrap();
|
|
ctx.builder.position_at_end(cleanup);
|
|
gen_block(generator, ctx, finalbody.iter())?;
|
|
if !ctx.is_terminated() {
|
|
ctx.build_call_or_invoke(resume, &[], "resume");
|
|
ctx.builder.build_unreachable();
|
|
}
|
|
|
|
// normal path
|
|
let (final_state, mut final_targets, final_paths) = final_data.unwrap();
|
|
let tail = ctx.ctx.append_basic_block(current_fun, "try.tail");
|
|
final_targets.push(tail);
|
|
let finalizer = ctx.ctx.append_basic_block(current_fun, "try.finally");
|
|
ctx.builder.position_at_end(finalizer);
|
|
gen_block(generator, ctx, finalbody.iter())?;
|
|
if !ctx.is_terminated() {
|
|
let dest = ctx.builder.build_load(final_state, "final_dest");
|
|
ctx.builder.build_indirect_branch(dest, &final_targets);
|
|
}
|
|
for block in final_paths.iter() {
|
|
if block.get_terminator().is_none() {
|
|
ctx.builder.position_at_end(*block);
|
|
ctx.builder.build_unconditional_branch(finalizer);
|
|
}
|
|
}
|
|
for block in [body].iter().chain(post_handlers.iter()) {
|
|
if block.get_terminator().is_none() {
|
|
ctx.builder.position_at_end(*block);
|
|
unsafe {
|
|
ctx.builder.build_store(final_state, tail.get_address().unwrap());
|
|
}
|
|
ctx.builder.build_unconditional_branch(finalizer);
|
|
}
|
|
}
|
|
ctx.builder.position_at_end(tail);
|
|
}
|
|
Ok(())
|
|
} else {
|
|
unreachable!()
|
|
}
|
|
}
|
|
|
|
pub fn gen_with<'ctx, 'a, G: CodeGenerator>(
|
|
_: &mut G,
|
|
_: &mut CodeGenContext<'ctx, 'a>,
|
|
stmt: &Stmt<Option<Type>>,
|
|
) -> Result<(), String> {
|
|
// TODO: Implement with statement after finishing exceptions
|
|
Err(format!("With statement with custom types is not yet supported (at {})", stmt.location))
|
|
}
|
|
|
|
pub fn gen_return<'ctx, 'a, G: CodeGenerator>(
|
|
generator: &mut G,
|
|
ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
value: &Option<Box<Expr<Option<Type>>>>,
|
|
) -> Result<(), String> {
|
|
let value = value
|
|
.as_ref()
|
|
.map(|v_expr| {
|
|
generator.gen_expr(ctx, v_expr).and_then(|v| {
|
|
v.unwrap().to_basic_value_enum(ctx, generator, v_expr.custom.unwrap())
|
|
})
|
|
})
|
|
.transpose()?;
|
|
if let Some(return_target) = ctx.return_target {
|
|
if let Some(value) = value {
|
|
ctx.builder.build_store(ctx.return_buffer.unwrap(), value);
|
|
}
|
|
ctx.builder.build_unconditional_branch(return_target);
|
|
} else if ctx.need_sret {
|
|
// sret
|
|
ctx.builder.build_store(ctx.return_buffer.unwrap(), value.unwrap());
|
|
ctx.builder.build_return(None);
|
|
} else {
|
|
let value = value.as_ref().map(|v| v as &dyn BasicValue);
|
|
ctx.builder.build_return(value);
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
pub fn gen_stmt<'ctx, 'a, G: CodeGenerator>(
|
|
generator: &mut G,
|
|
ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
stmt: &Stmt<Option<Type>>,
|
|
) -> Result<(), String> {
|
|
ctx.current_loc = stmt.location;
|
|
match &stmt.node {
|
|
StmtKind::Pass { .. } => {}
|
|
StmtKind::Expr { value, .. } => {
|
|
generator.gen_expr(ctx, value)?;
|
|
}
|
|
StmtKind::Return { value, .. } => {
|
|
gen_return(generator, ctx, value)?;
|
|
}
|
|
StmtKind::AnnAssign { target, value, .. } => {
|
|
if let Some(value) = value {
|
|
let value = generator.gen_expr(ctx, value)?.unwrap();
|
|
generator.gen_assign(ctx, target, value)?;
|
|
}
|
|
}
|
|
StmtKind::Assign { targets, value, .. } => {
|
|
let value = generator.gen_expr(ctx, value)?.unwrap();
|
|
for target in targets.iter() {
|
|
generator.gen_assign(ctx, target, value.clone())?;
|
|
}
|
|
}
|
|
StmtKind::Continue { .. } => {
|
|
ctx.builder.build_unconditional_branch(ctx.loop_target.unwrap().0);
|
|
}
|
|
StmtKind::Break { .. } => {
|
|
ctx.builder.build_unconditional_branch(ctx.loop_target.unwrap().1);
|
|
}
|
|
StmtKind::If { .. } => generator.gen_if(ctx, stmt)?,
|
|
StmtKind::While { .. } => generator.gen_while(ctx, stmt)?,
|
|
StmtKind::For { .. } => generator.gen_for(ctx, stmt)?,
|
|
StmtKind::With { .. } => generator.gen_with(ctx, stmt)?,
|
|
StmtKind::AugAssign { target, op, value, .. } => {
|
|
let value = gen_binop_expr(generator, ctx, target, op, value, stmt.location, true)?;
|
|
generator.gen_assign(ctx, target, value.unwrap())?;
|
|
}
|
|
StmtKind::Try { .. } => gen_try(generator, ctx, stmt)?,
|
|
StmtKind::Raise { exc, .. } => {
|
|
if let Some(exc) = exc {
|
|
let exc = generator.gen_expr(ctx, exc)?.unwrap().to_basic_value_enum(
|
|
ctx,
|
|
generator,
|
|
exc.custom.unwrap(),
|
|
)?;
|
|
gen_raise(generator, ctx, Some(&exc), stmt.location);
|
|
} else {
|
|
gen_raise(generator, ctx, None, stmt.location);
|
|
}
|
|
}
|
|
StmtKind::Assert { test, msg, .. } => {
|
|
let test = generator.gen_expr(ctx, test)?.unwrap().to_basic_value_enum(
|
|
ctx,
|
|
generator,
|
|
test.custom.unwrap(),
|
|
)?;
|
|
let err_msg = match msg {
|
|
Some(msg) => generator.gen_expr(ctx, msg)?.unwrap().to_basic_value_enum(
|
|
ctx,
|
|
generator,
|
|
msg.custom.unwrap(),
|
|
)?,
|
|
None => ctx.gen_string(generator, ""),
|
|
};
|
|
ctx.make_assert_impl(
|
|
generator,
|
|
test.into_int_value(),
|
|
"0:AssertionError",
|
|
err_msg,
|
|
[None, None, None],
|
|
stmt.location,
|
|
)
|
|
}
|
|
_ => unimplemented!()
|
|
};
|
|
Ok(())
|
|
}
|
|
|
|
pub fn gen_block<'ctx, 'a, 'b, G: CodeGenerator, I: Iterator<Item = &'b Stmt<Option<Type>>>>(
|
|
generator: &mut G,
|
|
ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
stmts: I,
|
|
) -> Result<(), String> {
|
|
for stmt in stmts {
|
|
generator.gen_stmt(ctx, stmt)?;
|
|
if ctx.is_terminated() {
|
|
break;
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|