nac3/nac3standalone/src/main.rs

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use clap::Parser;
use inkwell::{
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memory_buffer::MemoryBuffer,
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passes::PassBuilderOptions,
support::is_multithreaded,
targets::*,
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OptimizationLevel,
};
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use parking_lot::{Mutex, RwLock};
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use std::{collections::HashMap, fs, path::Path, sync::Arc};
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use nac3core::{
codegen::{
concrete_type::ConcreteTypeStore, irrt::load_irrt, CodeGenLLVMOptions,
CodeGenTargetMachineOptions, CodeGenTask, DefaultCodeGenerator, WithCall, WorkerRegistry,
},
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symbol_resolver::SymbolResolver,
toplevel::{
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composer::TopLevelComposer, helper::parse_parameter_default_value, type_annotation::*,
TopLevelDef,
},
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typecheck::{
type_inferencer::PrimitiveStore,
typedef::{FunSignature, Type, Unifier},
},
};
use nac3parser::{
ast::{Expr, ExprKind, StmtKind},
parser,
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};
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mod basic_symbol_resolver;
use basic_symbol_resolver::*;
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/// Command-line argument parser definition.
#[derive(Parser)]
#[command(author, version, about, long_about = None)]
struct CommandLineArgs {
/// The name of the input file.
file_name: String,
/// The number of threads allocated to processing the source file. If 0 is passed to this
/// parameter, all available threads will be used for compilation.
#[arg(short = 'T', default_value_t = 1)]
threads: u32,
/// The level to optimize the LLVM IR.
#[arg(short = 'O', default_value_t = 2, value_parser = clap::value_parser!(u32).range(0..=3))]
opt_level: u32,
/// Whether to emit LLVM IR at the end of every module.
///
/// If multithreaded compilation is also enabled, each thread will emit its own module.
#[arg(long, default_value_t = false)]
emit_llvm: bool,
/// The target triple to compile for.
#[arg(long)]
triple: Option<String>,
/// The target CPU to compile for.
#[arg(long)]
mcpu: Option<String>,
/// Additional target features to enable/disable, specified using the `+`/`-` prefixes.
#[arg(long)]
target_features: Option<String>,
}
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fn handle_typevar_definition(
var: &Expr,
resolver: &(dyn SymbolResolver + Send + Sync),
def_list: &[Arc<RwLock<TopLevelDef>>],
unifier: &mut Unifier,
primitives: &PrimitiveStore,
) -> Result<Type, String> {
if let ExprKind::Call { func, args, .. } = &var.node {
if matches!(&func.node, ExprKind::Name { id, .. } if id == &"TypeVar".into()) {
let constraints = args
.iter()
.skip(1)
.map(|x| -> Result<Type, String> {
let ty = parse_ast_to_type_annotation_kinds(
resolver,
def_list,
unifier,
primitives,
x,
Default::default(),
)?;
get_type_from_type_annotation_kinds(
def_list, unifier, primitives, &ty, &mut None
)
})
.collect::<Result<Vec<_>, _>>()?;
Ok(unifier.get_fresh_var_with_range(&constraints, None, None).0)
} else {
Err(format!(
"expression {:?} cannot be handled as a TypeVar in global scope",
var
))
}
} else {
Err(format!(
"expression {:?} cannot be handled as a TypeVar in global scope",
var
))
}
}
fn handle_assignment_pattern(
targets: &[Expr],
value: &Expr,
resolver: &(dyn SymbolResolver + Send + Sync),
internal_resolver: &ResolverInternal,
def_list: &[Arc<RwLock<TopLevelDef>>],
unifier: &mut Unifier,
primitives: &PrimitiveStore,
) -> Result<(), String> {
if targets.len() == 1 {
match &targets[0].node {
ExprKind::Name { id, .. } => {
if let Ok(var) = handle_typevar_definition(
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value,
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resolver,
def_list,
unifier,
primitives,
) {
internal_resolver.add_id_type(*id, var);
Ok(())
} else if let Ok(val) =
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parse_parameter_default_value(value, resolver)
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{
internal_resolver.add_module_global(*id, val);
Ok(())
} else {
Err(format!("fails to evaluate this expression `{:?}` as a constant or TypeVar at {}",
targets[0].node,
targets[0].location,
))
}
}
ExprKind::List { elts, .. } | ExprKind::Tuple { elts, .. } => {
handle_assignment_pattern(
elts,
value,
resolver,
internal_resolver,
def_list,
unifier,
primitives,
)?;
Ok(())
}
_ => Err(format!(
"assignment to {:?} is not supported at {}",
targets[0], targets[0].location
)),
}
} else {
match &value.node {
ExprKind::List { elts, .. } | ExprKind::Tuple { elts, .. } => {
if elts.len() != targets.len() {
Err(format!(
"number of elements to unpack does not match (expect {}, found {}) at {}",
targets.len(),
elts.len(),
value.location
))
} else {
for (tar, val) in targets.iter().zip(elts) {
handle_assignment_pattern(
std::slice::from_ref(tar),
val,
resolver,
internal_resolver,
def_list,
unifier,
primitives,
)?;
}
Ok(())
}
}
_ => Err(format!(
"unpack of this expression is not supported at {}",
value.location
)),
}
}
}
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fn main() {
let cli = CommandLineArgs::parse();
let CommandLineArgs {
file_name,
threads,
opt_level,
emit_llvm,
triple,
mcpu,
target_features,
} = cli;
Target::initialize_all(&InitializationConfig::default());
let host_target_machine = CodeGenTargetMachineOptions::from_host();
let triple = triple.unwrap_or(host_target_machine.triple.clone());
let mcpu = mcpu
.map(|arg| if arg == "native" { host_target_machine.cpu.clone() } else { arg })
.unwrap_or_default();
let target_features = target_features.unwrap_or_default();
let threads = if is_multithreaded() {
if threads == 0 {
std::thread::available_parallelism()
.map(|threads| threads.get() as u32)
.unwrap_or(1u32)
} else {
threads
}
} else {
if threads != 1 {
println!("Warning: Number of threads specified in command-line but multithreading is disabled in LLVM at build time! Defaulting to single-threaded compilation")
}
1
};
let opt_level = match opt_level {
0 => OptimizationLevel::None,
1 => OptimizationLevel::Less,
2 => OptimizationLevel::Default,
// The default behavior for -O<n> where n>3 defaults to O3 for both Clang and GCC
_ => OptimizationLevel::Aggressive,
};
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let program = match fs::read_to_string(file_name.clone()) {
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Ok(program) => program,
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Err(err) => {
println!("Cannot open input file: {}", err);
return;
}
};
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let primitive: PrimitiveStore = TopLevelComposer::make_primitives().0;
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let (mut composer, builtins_def, builtins_ty) =
TopLevelComposer::new(vec![], Default::default());
let internal_resolver: Arc<ResolverInternal> = ResolverInternal {
id_to_type: builtins_ty.into(),
id_to_def: builtins_def.into(),
class_names: Default::default(),
module_globals: Default::default(),
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str_store: Default::default(),
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}.into();
let resolver =
Arc::new(Resolver(internal_resolver.clone())) as Arc<dyn SymbolResolver + Send + Sync>;
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let parser_result = parser::parse_program(&program, file_name.into()).unwrap();
for stmt in parser_result.into_iter() {
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match &stmt.node {
StmtKind::Assign { targets, value, .. } => {
let def_list = composer.extract_def_list();
let unifier = &mut composer.unifier;
let primitives = &composer.primitives_ty;
if let Err(err) = handle_assignment_pattern(
targets,
value,
resolver.as_ref(),
internal_resolver.as_ref(),
&def_list,
unifier,
primitives,
) {
eprintln!("{}", err);
return;
}
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},
// allow (and ignore) "from __future__ import annotations"
StmtKind::ImportFrom { module, names, .. }
if module == &Some("__future__".into()) && names.len() == 1 && names[0].name == "annotations".into() => (),
_ => {
let (name, def_id, ty) =
composer.register_top_level(stmt, Some(resolver.clone()), "__main__".into(), true).unwrap();
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internal_resolver.add_id_def(name, def_id);
if let Some(ty) = ty {
internal_resolver.add_id_type(name, ty);
}
}
}
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}
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let signature = FunSignature { args: vec![], ret: primitive.int32, vars: HashMap::new() };
let mut store = ConcreteTypeStore::new();
let mut cache = HashMap::new();
let signature = store.from_signature(&mut composer.unifier, &primitive, &signature, &mut cache);
let signature = store.add_cty(signature);
composer.start_analysis(true).unwrap();
let top_level = Arc::new(composer.make_top_level_context());
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let instance = {
let defs = top_level.definitions.read();
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let mut instance = defs[resolver
.get_identifier_def("run".into())
.unwrap_or_else(|_| panic!("cannot find run() entry point"))
.0]
.write();
if let TopLevelDef::Function { instance_to_stmt, instance_to_symbol, .. } = &mut *instance {
instance_to_symbol.insert("".to_string(), "run".to_string());
instance_to_stmt[""].clone()
} else {
unreachable!()
}
};
let llvm_options = CodeGenLLVMOptions {
opt_level,
target: CodeGenTargetMachineOptions {
triple,
cpu: mcpu,
features: target_features,
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reloc_mode: RelocMode::PIC,
..host_target_machine
},
};
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let task = CodeGenTask {
subst: Default::default(),
symbol_name: "run".to_string(),
body: instance.body,
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signature,
resolver,
store,
unifier_index: instance.unifier_id,
calls: instance.calls,
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id: 0,
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};
let membuffers: Arc<Mutex<Vec<Vec<u8>>>> = Default::default();
let membuffer = membuffers.clone();
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let f = Arc::new(WithCall::new(Box::new(move |module| {
let buffer = module.write_bitcode_to_memory();
let buffer = buffer.as_slice().into();
membuffer.lock().push(buffer);
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})));
let threads = (0..threads)
.map(|i| Box::new(DefaultCodeGenerator::new(format!("module{}", i), 64)))
.collect();
let (registry, handles) = WorkerRegistry::create_workers(threads, top_level, &llvm_options, f);
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registry.add_task(task);
registry.wait_tasks_complete(handles);
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let buffers = membuffers.lock();
let context = inkwell::context::Context::create();
let main = context
.create_module_from_ir(MemoryBuffer::create_from_memory_range(&buffers[0], "main"))
.unwrap();
if emit_llvm {
main.write_bitcode_to_path(Path::new("main.bc"));
}
for (idx, buffer) in buffers.iter().skip(1).enumerate() {
let other = context
.create_module_from_ir(MemoryBuffer::create_from_memory_range(buffer, "main"))
.unwrap();
if emit_llvm {
other.write_bitcode_to_path(Path::new(&format!("module{}.bc", idx)));
}
main.link_in_module(other).unwrap();
}
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let irrt = load_irrt(&context);
if emit_llvm {
irrt.write_bitcode_to_path(Path::new("irrt.bc"));
}
main.link_in_module(irrt).unwrap();
let mut function_iter = main.get_first_function();
while let Some(func) = function_iter {
if func.count_basic_blocks() > 0 && func.get_name().to_str().unwrap() != "run" {
func.set_linkage(inkwell::module::Linkage::Private);
}
function_iter = func.get_next_function();
}
let target_machine = llvm_options.target
.create_target_machine(llvm_options.opt_level)
.expect("couldn't create target machine");
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let pass_options = PassBuilderOptions::create();
pass_options.set_merge_functions(true);
let passes = format!("default<O{}>", opt_level as u32);
let result = main.run_passes(passes.as_str(), &target_machine, pass_options);
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if let Err(err) = result {
panic!("Failed to run optimization for module `main`: {}", err.to_string());
}
target_machine
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.write_to_file(&main, FileType::Object, Path::new("module.o"))
.expect("couldn't write module to file");
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}