nac3core: codegen refactoring
- No longer check if the statement will return. Instead, we check if the current basic block is terminated, which is simpler and handles exception/break/continue better. - Use invoke statement when unwind is needed. - Moved codegen for a block of statements into a separate function.
This commit is contained in:
parent
b267a656a8
commit
7ea5a5f84d
@ -12,12 +12,12 @@ use crate::{
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typecheck::typedef::{FunSignature, FuncArg, Type, TypeEnum, Unifier},
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};
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use inkwell::{
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types::{BasicType, BasicTypeEnum},
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values::{BasicValueEnum, IntValue, PointerValue},
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AddressSpace,
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types::{BasicType, BasicTypeEnum},
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values::{BasicValueEnum, FunctionValue, IntValue, PointerValue}
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};
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use itertools::{chain, izip, zip, Itertools};
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use nac3parser::ast::{self, Boolop, Comprehension, Constant, Expr, ExprKind, Operator, StrRef};
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use nac3parser::ast::{self, Boolop, Comprehension, Constant, Expr, ExprKind, Location, Operator, StrRef};
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use super::CodeGenerator;
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@ -256,6 +256,25 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
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_ => unimplemented!(),
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}
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}
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pub fn build_call_or_invoke(
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&self,
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fun: FunctionValue<'ctx>,
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params: &[BasicValueEnum<'ctx>],
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call_name: &str
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) -> Option<BasicValueEnum<'ctx>> {
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if let Some(target) = self.unwind_target {
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let current = self.builder.get_insert_block().unwrap().get_parent().unwrap();
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let then_block = self.ctx.append_basic_block(current, &format!("after.{}", call_name));
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let result = self.builder.build_invoke(fun, params, then_block, target, call_name).try_as_basic_value().left();
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self.builder.position_at_end(then_block);
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result
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} else {
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let param: Vec<_> = params.iter().map(|v| (*v).into()).collect();
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self.builder.build_call(fun, ¶m, call_name).try_as_basic_value().left()
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}
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}
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pub fn gen_string<G: CodeGenerator, S: Into<String>>(
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&mut self,
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generator: &mut G,
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@ -404,7 +423,7 @@ pub fn gen_call<'ctx, 'a, G: CodeGenerator>(
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}
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// default value handling
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for k in keys.into_iter() {
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mapping.insert(k.name, ctx.gen_symbol_val(&k.default_value.unwrap()).into());
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mapping.insert(k.name, ctx.gen_symbol_val(generator, &k.default_value.unwrap()).into());
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}
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// reorder the parameters
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let mut real_params =
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@ -474,7 +493,8 @@ pub fn gen_call<'ctx, 'a, G: CodeGenerator>(
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};
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ctx.module.add_function(&symbol, fun_ty, None)
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});
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ctx.builder.build_call(fun_val, ¶m_vals, "call").try_as_basic_value().left()
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ctx.build_call_or_invoke(fun_val, ¶m_vals, "call")
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}
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pub fn destructure_range<'ctx, 'a>(
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@ -715,7 +735,7 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator>(
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Some(match &expr.node {
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ExprKind::Constant { value, .. } => {
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let ty = expr.custom.unwrap();
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ctx.gen_const(value, ty).into()
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ctx.gen_const(generator, value, ty).into()
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}
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ExprKind::Name { id, .. } => match ctx.var_assignment.get(id) {
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Some((ptr, None, _)) => ctx.builder.build_load(*ptr, "load").into(),
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@ -117,67 +117,45 @@ pub trait CodeGenerator {
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/// Generate code for a while expression.
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/// Return true if the while loop must early return
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fn gen_while<'ctx, 'a>(
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&mut self,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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stmt: &Stmt<Option<Type>>,
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) -> bool
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fn gen_while<'ctx, 'a>(&mut self, ctx: &mut CodeGenContext<'ctx, 'a>, stmt: &Stmt<Option<Type>>)
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where
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Self: Sized,
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{
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gen_while(self, ctx, stmt);
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false
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}
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/// Generate code for a while expression.
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/// Return true if the while loop must early return
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fn gen_for<'ctx, 'a>(
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&mut self,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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stmt: &Stmt<Option<Type>>,
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) -> bool
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fn gen_for<'ctx, 'a>(&mut self, ctx: &mut CodeGenContext<'ctx, 'a>, stmt: &Stmt<Option<Type>>)
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where
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Self: Sized,
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{
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gen_for(self, ctx, stmt);
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false
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}
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/// Generate code for an if expression.
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/// Return true if the statement must early return
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fn gen_if<'ctx, 'a>(
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&mut self,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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stmt: &Stmt<Option<Type>>,
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) -> bool
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fn gen_if<'ctx, 'a>(&mut self, ctx: &mut CodeGenContext<'ctx, 'a>, stmt: &Stmt<Option<Type>>)
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where
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Self: Sized,
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{
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gen_if(self, ctx, stmt)
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gen_if(self, ctx, stmt);
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}
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fn gen_with<'ctx, 'a>(
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&mut self,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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stmt: &Stmt<Option<Type>>,
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) -> bool
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fn gen_with<'ctx, 'a>(&mut self, ctx: &mut CodeGenContext<'ctx, 'a>, stmt: &Stmt<Option<Type>>)
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where
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Self: Sized,
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{
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gen_with(self, ctx, stmt)
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gen_with(self, ctx, stmt);
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}
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/// Generate code for a statement
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/// Return true if the statement must early return
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fn gen_stmt<'ctx, 'a>(
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&mut self,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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stmt: &Stmt<Option<Type>>,
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) -> bool
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fn gen_stmt<'ctx, 'a>(&mut self, ctx: &mut CodeGenContext<'ctx, 'a>, stmt: &Stmt<Option<Type>>)
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where
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Self: Sized,
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{
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gen_stmt(self, ctx, stmt)
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gen_stmt(self, ctx, stmt);
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}
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}
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@ -14,7 +14,7 @@ use inkwell::{
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module::Module,
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passes::{PassManager, PassManagerBuilder},
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types::{BasicType, BasicTypeEnum},
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values::{FunctionValue, PointerValue},
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values::{BasicValueEnum, FunctionValue, PhiValue, PointerValue},
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AddressSpace, OptimizationLevel,
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};
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use itertools::Itertools;
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@ -60,11 +60,28 @@ pub struct CodeGenContext<'ctx, 'a> {
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pub primitives: PrimitiveStore,
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pub calls: Arc<HashMap<CodeLocation, CallId>>,
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pub registry: &'a WorkerRegistry,
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// const string cache
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pub const_strings: HashMap<String, BasicValueEnum<'ctx>>,
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// stores the alloca for variables
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pub init_bb: BasicBlock<'ctx>,
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// where continue and break should go to respectively
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// the first one is the test_bb, and the second one is bb after the loop
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pub loop_bb: Option<(BasicBlock<'ctx>, BasicBlock<'ctx>)>,
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pub loop_target: Option<(BasicBlock<'ctx>, BasicBlock<'ctx>)>,
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// unwind target bb
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pub unwind_target: Option<BasicBlock<'ctx>>,
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// return target bb, just emit ret if no such target
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pub return_target: Option<BasicBlock<'ctx>>,
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pub return_buffer: Option<PointerValue<'ctx>>,
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// outer finally block function
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pub outer_final: Option<(PointerValue<'ctx>, Vec<BasicBlock<'ctx>>, Vec<BasicBlock<'ctx>>)>,
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// outer catch clauses
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pub outer_catch_clauses:
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Option<(Vec<Option<BasicValueEnum<'ctx>>>, BasicBlock<'ctx>, PhiValue<'ctx>)>,
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}
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impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
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pub fn is_terminated(&self) -> bool {
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self.builder.get_insert_block().unwrap().get_terminator().is_some()
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}
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}
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type Fp = Box<dyn Fn(&Module) + Send + Sync>;
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@ -182,7 +199,7 @@ impl WorkerRegistry {
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fn worker_thread<G: CodeGenerator>(&self, generator: &mut G, f: Arc<WithCall>) {
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let context = Context::create();
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let mut builder = context.create_builder();
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let mut module = context.create_module(generator.get_name());
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let module = context.create_module(generator.get_name());
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let pass_builder = PassManagerBuilder::create();
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pass_builder.set_optimization_level(OptimizationLevel::Default);
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@ -190,10 +207,12 @@ impl WorkerRegistry {
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pass_builder.populate_function_pass_manager(&passes);
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while let Some(task) = self.receiver.recv().unwrap() {
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let result = gen_func(&context, generator, self, builder, module, task);
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let tmp_module = context.create_module("tmp");
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let result = gen_func(&context, generator, self, builder, tmp_module, task);
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builder = result.0;
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module = result.1;
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passes.run_on(&result.2);
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module.link_in_module(result.1).unwrap();
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// module = result.1;
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*self.task_count.lock() -= 1;
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self.wait_condvar.notify_all();
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}
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@ -235,20 +254,26 @@ fn get_llvm_type<'ctx>(
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// we assume the type cache should already contain primitive types,
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// and they should be passed by value instead of passing as pointer.
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type_cache.get(&unifier.get_representative(ty)).cloned().unwrap_or_else(|| {
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let ty = unifier.get_ty(ty);
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match &*ty {
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let ty_enum = unifier.get_ty(ty);
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let result = match &*ty_enum {
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TObj { obj_id, fields, .. } => {
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// check to avoid treating primitives as classes
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if obj_id.0 <= 7 {
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unreachable!();
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}
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// a struct with fields in the order of declaration
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let top_level_defs = top_level.definitions.read();
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let definition = top_level_defs.get(obj_id.0).unwrap();
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let ty = if let TopLevelDef::Class { fields: fields_list, .. } = &*definition.read()
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let ty = if let TopLevelDef::Class { name, fields: fields_list, .. } = &*definition.read()
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{
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let struct_type = ctx.opaque_struct_type(&name.to_string());
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let fields = fields.borrow();
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let fields = fields_list
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.iter()
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.map(|f| get_llvm_type(ctx, generator, unifier, top_level, type_cache, fields[&f.0].0))
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.collect_vec();
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ctx.struct_type(&fields, false).ptr_type(AddressSpace::Generic).into()
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struct_type.set_body(&fields, false);
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struct_type.ptr_type(AddressSpace::Generic).into()
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} else {
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unreachable!()
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};
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@ -270,8 +295,10 @@ fn get_llvm_type<'ctx>(
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ctx.struct_type(&fields, false).ptr_type(AddressSpace::Generic).into()
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}
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TVirtual { .. } => unimplemented!(),
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_ => unreachable!("{}", ty.get_type_name()),
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}
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_ => unreachable!("{}", ty_enum.get_type_name()),
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};
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type_cache.insert(unifier.get_representative(ty), result);
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result
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})
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}
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@ -415,6 +442,7 @@ pub fn gen_func<'ctx, G: CodeGenerator>(
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builder.build_store(alloca, param);
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var_assignment.insert(arg.name, (alloca, None, 0));
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}
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let return_buffer = fn_type.get_return_type().map(|v| builder.build_alloca(v, "$ret"));
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let static_values = {
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let store = registry.static_value_store.lock();
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store.store[task.id].clone()
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@ -432,7 +460,13 @@ pub fn gen_func<'ctx, G: CodeGenerator>(
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resolver: task.resolver,
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top_level: top_level_ctx.as_ref(),
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calls: task.calls,
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loop_bb: None,
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loop_target: None,
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return_target: None,
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return_buffer,
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unwind_target: None,
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outer_final: None,
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outer_catch_clauses: None,
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const_strings: Default::default(),
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registry,
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var_assignment,
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type_cache,
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@ -444,15 +478,14 @@ pub fn gen_func<'ctx, G: CodeGenerator>(
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static_value_store,
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};
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let mut returned = false;
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for stmt in task.body.iter() {
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returned = generator.gen_stmt(&mut code_gen_context, stmt);
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if returned {
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generator.gen_stmt(&mut code_gen_context, stmt);
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if code_gen_context.is_terminated() {
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break;
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}
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}
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// after static analysis, only void functions can have no return at the end.
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if !returned {
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if !code_gen_context.is_terminated() {
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code_gen_context.builder.build_return(None);
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}
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@ -6,13 +6,17 @@ use super::{
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};
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use crate::{
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codegen::expr::gen_binop_expr,
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typecheck::typedef::{Type, TypeEnum},
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toplevel::{DefinitionId, TopLevelDef},
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typecheck::typedef::{Type, TypeEnum, FunSignature}
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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, PointerValue},
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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::{Expr, ExprKind, Stmt, StmtKind};
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use nac3parser::ast::{ExcepthandlerKind, Expr, ExprKind, Location, Stmt, StmtKind, StrRef, Constant};
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use std::convert::TryFrom;
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pub fn gen_var<'ctx, 'a>(
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@ -173,7 +177,7 @@ pub fn gen_for<'ctx, 'a, G: CodeGenerator>(
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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_bb.replace((test_bb, cont_bb));
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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(ctx, generator);
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if ctx.unifier.unioned(iter.custom.unwrap(), ctx.primitives.range) {
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@ -234,22 +238,22 @@ pub fn gen_for<'ctx, 'a, G: CodeGenerator>(
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generator.gen_assign(ctx, target, val.into());
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}
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for stmt in body.iter() {
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generator.gen_stmt(ctx, stmt);
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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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ctx.builder.build_unconditional_branch(test_bb);
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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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for stmt in orelse.iter() {
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generator.gen_stmt(ctx, stmt);
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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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ctx.builder.build_unconditional_branch(cont_bb);
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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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@ -258,7 +262,7 @@ pub fn gen_for<'ctx, 'a, G: CodeGenerator>(
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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_bb = loop_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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@ -282,7 +286,7 @@ pub fn gen_while<'ctx, 'a, G: CodeGenerator>(
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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_bb.replace((test_bb, cont_bb));
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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(ctx, generator);
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@ -292,22 +296,22 @@ pub fn gen_while<'ctx, 'a, G: CodeGenerator>(
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unreachable!()
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};
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ctx.builder.position_at_end(body_bb);
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for stmt in body.iter() {
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generator.gen_stmt(ctx, stmt);
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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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ctx.builder.build_unconditional_branch(test_bb);
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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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for stmt in orelse.iter() {
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generator.gen_stmt(ctx, stmt);
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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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ctx.builder.build_unconditional_branch(cont_bb);
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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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@ -316,7 +320,7 @@ pub fn gen_while<'ctx, 'a, G: CodeGenerator>(
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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_bb = loop_bb;
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ctx.loop_target = loop_bb;
|
||||
} else {
|
||||
unreachable!()
|
||||
}
|
||||
@ -326,7 +330,7 @@ pub fn gen_if<'ctx, 'a, G: CodeGenerator>(
|
||||
generator: &mut G,
|
||||
ctx: &mut CodeGenContext<'ctx, 'a>,
|
||||
stmt: &Stmt<Option<Type>>,
|
||||
) -> bool {
|
||||
) {
|
||||
if let StmtKind::If { test, body, orelse, .. } = &stmt.node {
|
||||
// var_assignment static values may be changed in another branch
|
||||
// if so, remove the static value as it may not be correct in this branch
|
||||
@ -352,13 +356,7 @@ pub fn gen_if<'ctx, 'a, G: CodeGenerator>(
|
||||
unreachable!()
|
||||
};
|
||||
ctx.builder.position_at_end(body_bb);
|
||||
let mut exited = false;
|
||||
for stmt in body.iter() {
|
||||
exited = generator.gen_stmt(ctx, stmt);
|
||||
if exited {
|
||||
break;
|
||||
}
|
||||
}
|
||||
gen_block(generator, ctx, body.iter());
|
||||
for (k, (_, _, counter)) in var_assignment.iter() {
|
||||
let (_, static_val, counter2) = ctx.var_assignment.get_mut(k).unwrap();
|
||||
if counter != counter2 {
|
||||
@ -366,32 +364,22 @@ pub fn gen_if<'ctx, 'a, G: CodeGenerator>(
|
||||
}
|
||||
}
|
||||
|
||||
if !exited {
|
||||
if !ctx.is_terminated() {
|
||||
if cont_bb.is_none() {
|
||||
cont_bb = Some(ctx.ctx.append_basic_block(current, "cont"));
|
||||
}
|
||||
ctx.builder.build_unconditional_branch(cont_bb.unwrap());
|
||||
}
|
||||
let then_exited = exited;
|
||||
let else_exited = if !orelse.is_empty() {
|
||||
exited = false;
|
||||
if !orelse.is_empty() {
|
||||
ctx.builder.position_at_end(orelse_bb);
|
||||
for stmt in orelse.iter() {
|
||||
exited = generator.gen_stmt(ctx, stmt);
|
||||
if exited {
|
||||
break;
|
||||
}
|
||||
}
|
||||
if !exited {
|
||||
gen_block(generator, ctx, orelse.iter());
|
||||
if !ctx.is_terminated() {
|
||||
if cont_bb.is_none() {
|
||||
cont_bb = Some(ctx.ctx.append_basic_block(current, "cont"));
|
||||
}
|
||||
ctx.builder.build_unconditional_branch(cont_bb.unwrap());
|
||||
}
|
||||
exited
|
||||
} else {
|
||||
false
|
||||
};
|
||||
}
|
||||
if let Some(cont_bb) = cont_bb {
|
||||
ctx.builder.position_at_end(cont_bb);
|
||||
}
|
||||
@ -401,7 +389,11 @@ pub fn gen_if<'ctx, 'a, G: CodeGenerator>(
|
||||
*static_val = None;
|
||||
}
|
||||
}
|
||||
then_exited && else_exited
|
||||
} else {
|
||||
unreachable!()
|
||||
}
|
||||
}
|
||||
|
||||
pub fn exn_constructor<'ctx, 'a>(
|
||||
ctx: &mut CodeGenContext<'ctx, 'a>,
|
||||
obj: Option<(Type, ValueEnum<'ctx>)>,
|
||||
@ -481,23 +473,37 @@ pub fn gen_with<'ctx, 'a, G: CodeGenerator>(
|
||||
unimplemented!()
|
||||
}
|
||||
|
||||
pub fn gen_return<'ctx, 'a, G: CodeGenerator>(
|
||||
generator: &mut G,
|
||||
ctx: &mut CodeGenContext<'ctx, 'a>,
|
||||
value: &Option<Box<Expr<Option<Type>>>>,
|
||||
) {
|
||||
let value = value
|
||||
.as_ref()
|
||||
.map(|v| generator.gen_expr(ctx, v).unwrap().to_basic_value_enum(ctx, generator));
|
||||
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 {
|
||||
let value = value.as_ref().map(|v| v as &dyn BasicValue);
|
||||
ctx.builder.build_return(value);
|
||||
}
|
||||
}
|
||||
|
||||
pub fn gen_stmt<'ctx, 'a, G: CodeGenerator>(
|
||||
generator: &mut G,
|
||||
ctx: &mut CodeGenContext<'ctx, 'a>,
|
||||
stmt: &Stmt<Option<Type>>,
|
||||
) -> bool {
|
||||
) {
|
||||
match &stmt.node {
|
||||
StmtKind::Pass { .. } => {}
|
||||
StmtKind::Expr { value, .. } => {
|
||||
generator.gen_expr(ctx, value);
|
||||
}
|
||||
StmtKind::Return { value, .. } => {
|
||||
let value = value
|
||||
.as_ref()
|
||||
.map(|v| generator.gen_expr(ctx, v).unwrap().to_basic_value_enum(ctx, generator));
|
||||
let value = value.as_ref().map(|v| v as &dyn BasicValue);
|
||||
ctx.builder.build_return(value);
|
||||
return true;
|
||||
gen_return(generator, ctx, value);
|
||||
}
|
||||
StmtKind::AnnAssign { target, value, .. } => {
|
||||
if let Some(value) = value {
|
||||
@ -512,17 +518,15 @@ pub fn gen_stmt<'ctx, 'a, G: CodeGenerator>(
|
||||
}
|
||||
}
|
||||
StmtKind::Continue { .. } => {
|
||||
ctx.builder.build_unconditional_branch(ctx.loop_bb.unwrap().0);
|
||||
return true;
|
||||
ctx.builder.build_unconditional_branch(ctx.loop_target.unwrap().0);
|
||||
}
|
||||
StmtKind::Break { .. } => {
|
||||
ctx.builder.build_unconditional_branch(ctx.loop_bb.unwrap().1);
|
||||
return true;
|
||||
ctx.builder.build_unconditional_branch(ctx.loop_target.unwrap().1);
|
||||
}
|
||||
StmtKind::If { .. } => return generator.gen_if(ctx, stmt),
|
||||
StmtKind::While { .. } => return generator.gen_while(ctx, stmt),
|
||||
StmtKind::For { .. } => return generator.gen_for(ctx, stmt),
|
||||
StmtKind::With { .. } => return generator.gen_with(ctx, stmt),
|
||||
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);
|
||||
generator.gen_assign(ctx, target, value);
|
||||
@ -530,4 +534,15 @@ pub fn gen_stmt<'ctx, 'a, G: CodeGenerator>(
|
||||
_ => unimplemented!(),
|
||||
};
|
||||
false
|
||||
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,
|
||||
) {
|
||||
for stmt in stmts {
|
||||
generator.gen_stmt(ctx, stmt);
|
||||
if ctx.is_terminated() {
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user