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/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* trans/codegen.cpp
* - Wrapper for translation
*/
#include "main_bindings.hpp"
#include "trans_list.hpp"
#include <hir/hir.hpp>
#include <mir/mir.hpp>
#include <mir/operations.hpp>
#include <algorithm>
#include "codegen.hpp"
#include "monomorphise.hpp"
void Trans_Codegen(const ::std::string& outfile, const TransOptions& opt, const ::HIR::Crate& crate, const TransList& list, bool is_executable)
{
static Span sp;
auto codegen = Trans_Codegen_GetGeneratorC(crate, outfile);
// 1. Emit structure/type definitions.
// - Emit in the order they're needed.
for(const auto& ty : list.m_types)
{
if( ty.second )
{
codegen->emit_type_proto(ty.first);
}
else
{
TU_IFLET( ::HIR::TypeRef::Data, ty.first.m_data, Path, te,
TU_MATCHA( (te.binding), (tpb),
(Unbound, throw ""; ),
(Opaque, throw ""; ),
(Struct,
codegen->emit_struct(sp, te.path.m_data.as_Generic(), *tpb);
),
(Union,
codegen->emit_union(sp, te.path.m_data.as_Generic(), *tpb);
),
(Enum,
codegen->emit_enum(sp, te.path.m_data.as_Generic(), *tpb);
)
)
)
codegen->emit_type(ty.first);
}
}
for(const auto& ty : list.m_typeids)
{
codegen->emit_type_id(ty);
}
// Emit required constructor methods (and other wrappers)
for(const auto& path : list.m_constructors)
{
// Get the item type
// - Function (must be an intrinsic)
// - Struct (must be a tuple struct)
// - Enum variant (must be a tuple variant)
const ::HIR::Module* mod_ptr = nullptr;
if(path.m_path.m_components.size() > 1)
{
const auto& nse = crate.get_typeitem_by_path(sp, path.m_path, false, true);
if(const auto* e = nse.opt_Enum())
{
auto var_idx = e->find_variant(path.m_path.m_components.back());
codegen->emit_constructor_enum(sp, path, *e, var_idx);
continue ;
}
mod_ptr = &nse.as_Module();
}
else
{
mod_ptr = &crate.get_mod_by_path(sp, path.m_path, true);
}
// Not an enum, currently must be a struct
const auto& te = mod_ptr->m_mod_items.at(path.m_path.m_components.back())->ent;
codegen->emit_constructor_struct(sp, path, te.as_Struct());
}
// 2. Emit function prototypes
for(const auto& ent : list.m_functions)
{
DEBUG("FUNCTION " << ent.first);
assert( ent.second->ptr );
const auto& fcn = *ent.second->ptr;
bool is_extern = ! static_cast<bool>(fcn.m_code);
if( fcn.m_code.m_mir ) {
codegen->emit_function_proto(ent.first, fcn, ent.second->pp, is_extern);
}
else {
// TODO: Why would an intrinsic be in the queue?
// - If it's exported it does.
if( fcn.m_abi == "rust-intrinsic" ) {
}
else {
codegen->emit_function_ext(ent.first, fcn, ent.second->pp);
}
}
}
// VTables (may be needed by statics)
for(const auto& ent : list.m_vtables)
{
const auto& trait = ent.first.m_data.as_UfcsKnown().trait;
const auto& type = *ent.first.m_data.as_UfcsKnown().type;
DEBUG("VTABLE " << trait << " for " << type);
codegen->emit_vtable(ent.first, crate.get_trait_by_path(Span(), trait.m_path));
}
// 3. Emit statics
for(const auto& ent : list.m_statics)
{
DEBUG("STATIC proto " << ent.first);
assert(ent.second->ptr);
const auto& stat = *ent.second->ptr;
if( ! stat.m_value_res.is_Invalid() )
{
codegen->emit_static_proto(ent.first, stat, ent.second->pp);
}
else
{
codegen->emit_static_ext(ent.first, stat, ent.second->pp);
}
}
for(const auto& ent : list.m_statics)
{
DEBUG("STATIC " << ent.first);
assert(ent.second->ptr);
const auto& stat = *ent.second->ptr;
if( ! stat.m_value_res.is_Invalid() )
{
codegen->emit_static_local(ent.first, stat, ent.second->pp);
}
}
// 4. Emit function code
for(const auto& ent : list.m_functions)
{
if( ent.second->ptr && ent.second->ptr->m_code.m_mir )
{
const auto& path = ent.first;
const auto& fcn = *ent.second->ptr;
const auto& pp = ent.second->pp;
TRACE_FUNCTION_F(path);
DEBUG("FUNCTION CODE " << path);
bool is_extern = ! static_cast<bool>(fcn.m_code);
// If this is a provided trait method, it needs to be monomorphised too.
bool is_method = ( fcn.m_args.size() > 0 && visit_ty_with(fcn.m_args[0].second, [&](const auto& x){return x == ::HIR::TypeRef("Self",0xFFFF);}) );
if( pp.has_types() || is_method )
{
::StaticTraitResolve resolve { crate };
auto ret_type = pp.monomorph(resolve, fcn.m_return);
::HIR::Function::args_t args;
for(const auto& a : fcn.m_args)
args.push_back(::std::make_pair( ::HIR::Pattern{}, pp.monomorph(resolve, a.second) ));
auto mir = Trans_Monomorphise(resolve, pp, fcn.m_code.m_mir);
::std::string s = FMT(path);
::HIR::ItemPath ip(s);
MIR_Validate(resolve, ip, *mir, args, ret_type);
MIR_Cleanup(resolve, ip, *mir, args, ret_type);
MIR_Optimise(resolve, ip, *mir, args, ret_type);
MIR_Validate(resolve, ip, *mir, args, ret_type);
// TODO: Flag that this should be a weak (or weak-er) symbol?
// - If it's from an external crate, it should be weak
codegen->emit_function_code(path, fcn, ent.second->pp, is_extern, mir);
}
// TODO: Detect if the function was a #[inline] function from another crate, and don't emit if that is the case?
// - Emiting is nice, but it should be emitted as a weak symbol
else {
codegen->emit_function_code(path, fcn, pp, is_extern, fcn.m_code.m_mir);
}
}
}
codegen->finalise(is_executable, opt);
}
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