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// Copyright (C) 2020-2024 Free Software Foundation, Inc.
// This file is part of GCC.
// GCC is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3, or (at your option) any later
// version.
// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
// You should have received a copy of the GNU General Public License
// along with GCC; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include "rust-compile-item.h"
#include "rust-compile-implitem.h"
#include "rust-compile-extern.h"
#include "rust-immutable-name-resolution-context.h"
namespace Rust {
namespace Compile {
void
CompileItem::visit (HIR::StaticItem &var)
{
// have we already compiled this?
Bvariable *static_decl_ref = nullptr;
if (ctx->lookup_var_decl (var.get_mappings ().get_hirid (), &static_decl_ref))
{
reference = Backend::var_expression (static_decl_ref, ref_locus);
return;
}
TyTy::BaseType *resolved_type = nullptr;
bool ok = ctx->get_tyctx ()->lookup_type (var.get_mappings ().get_hirid (),
&resolved_type);
rust_assert (ok);
tree type = TyTyResolveCompile::compile (ctx, resolved_type);
const Resolver::CanonicalPath *canonical_path = nullptr;
ok = ctx->get_mappings ().lookup_canonical_path (
var.get_mappings ().get_nodeid (), &canonical_path);
rust_assert (ok);
HIR::Expr *const_value_expr = var.get_expr ().get ();
ctx->push_const_context ();
tree value = compile_constant_item (resolved_type, canonical_path,
const_value_expr, var.get_locus ());
ctx->pop_const_context ();
std::string name = canonical_path->get ();
std::string asm_name = ctx->mangle_item (resolved_type, *canonical_path);
bool is_external = false;
bool is_hidden = false;
bool in_unique_section = true;
Bvariable *static_global
= Backend::global_variable (name, asm_name, type, is_external, is_hidden,
in_unique_section, var.get_locus ());
tree init = value == error_mark_node ? error_mark_node : DECL_INITIAL (value);
Backend::global_variable_set_init (static_global, init);
ctx->insert_var_decl (var.get_mappings ().get_hirid (), static_global);
ctx->push_var (static_global);
reference = Backend::var_expression (static_global, ref_locus);
}
void
CompileItem::visit (HIR::ConstantItem &constant)
{
auto &mappings = constant.get_mappings ();
if (ctx->lookup_const_decl (mappings.get_hirid (), &reference))
return;
// resolve the type
TyTy::BaseType *resolved_type = nullptr;
bool ok
= ctx->get_tyctx ()->lookup_type (mappings.get_hirid (), &resolved_type);
rust_assert (ok);
// canonical path
Resolver::CanonicalPath canonical_path
= Resolver::CanonicalPath::create_empty ();
if (flag_name_resolution_2_0)
{
auto nr_ctx
= Resolver2_0::ImmutableNameResolutionContext::get ().resolver ();
canonical_path
= nr_ctx.values.to_canonical_path (mappings.get_nodeid ()).value ();
}
else
{
const Resolver::CanonicalPath *canonical_path_ptr = nullptr;
ok = ctx->get_mappings ().lookup_canonical_path (mappings.get_nodeid (),
&canonical_path_ptr);
rust_assert (ok);
canonical_path = *canonical_path_ptr;
}
HIR::Expr *const_value_expr = constant.get_expr ().get ();
ctx->push_const_context ();
tree const_expr
= compile_constant_item (resolved_type, &canonical_path, const_value_expr,
constant.get_locus ());
ctx->pop_const_context ();
ctx->push_const (const_expr);
ctx->insert_const_decl (mappings.get_hirid (), const_expr);
reference = const_expr;
}
void
CompileItem::visit (HIR::Function &function)
{
TyTy::BaseType *fntype_tyty;
if (!ctx->get_tyctx ()->lookup_type (function.get_mappings ().get_hirid (),
&fntype_tyty))
{
rust_fatal_error (function.get_locus (),
"failed to lookup function type");
return;
}
rust_assert (fntype_tyty->get_kind () == TyTy::TypeKind::FNDEF);
TyTy::FnType *fntype = static_cast<TyTy::FnType *> (fntype_tyty);
if (fntype->has_substitutions_defined ())
{
// we cant do anything for this only when it is used and a concrete type
// is given
if (concrete == nullptr)
return;
else
{
rust_assert (concrete->get_kind () == TyTy::TypeKind::FNDEF);
fntype = static_cast<TyTy::FnType *> (concrete);
fntype->monomorphize ();
}
}
else
{
// if this is part of a trait impl block which is not generic we need to
// ensure associated types are setup
HirId parent_impl_block = UNKNOWN_HIRID;
HirId id = function.get_mappings ().get_hirid ();
HIR::ImplItem *impl_item
= ctx->get_mappings ().lookup_hir_implitem (id, &parent_impl_block);
if (impl_item != nullptr)
{
Resolver::AssociatedImplTrait *impl = nullptr;
bool found = ctx->get_tyctx ()->lookup_associated_trait_impl (
parent_impl_block, &impl);
if (found)
impl->setup_raw_associated_types ();
}
}
Resolver::CanonicalPath canonical_path
= Resolver::CanonicalPath::create_empty ();
if (flag_name_resolution_2_0)
{
auto nr_ctx
= Resolver2_0::ImmutableNameResolutionContext::get ().resolver ();
auto path = nr_ctx.values.to_canonical_path (
function.get_mappings ().get_nodeid ());
canonical_path = path.value ();
}
else
{
const Resolver::CanonicalPath *path = nullptr;
bool ok = ctx->get_mappings ().lookup_canonical_path (
function.get_mappings ().get_nodeid (), &path);
rust_assert (ok);
canonical_path = *path;
}
const std::string asm_name = ctx->mangle_item (fntype, canonical_path);
// items can be forward compiled which means we may not need to invoke this
// code. We might also have already compiled this generic function as well.
tree lookup = NULL_TREE;
if (ctx->lookup_function_decl (fntype->get_ty_ref (), &lookup,
fntype->get_id (), fntype, asm_name))
{
reference = address_expression (lookup, ref_locus);
return;
}
if (fntype->has_substitutions_defined ())
{
// override the Hir Lookups for the substituions in this context
fntype->override_context ();
}
if (function.get_qualifiers ().is_const ())
ctx->push_const_context ();
tree fndecl
= compile_function (function.get_function_name ().as_string (),
function.get_self_param (),
function.get_function_params (),
function.get_qualifiers (), function.get_visibility (),
function.get_outer_attrs (), function.get_locus (),
function.get_definition ().get (), &canonical_path,
fntype);
reference = address_expression (fndecl, ref_locus);
if (function.get_qualifiers ().is_const ())
ctx->pop_const_context ();
}
void
CompileItem::visit (HIR::ImplBlock &impl_block)
{
TyTy::BaseType *self_lookup = nullptr;
if (!ctx->get_tyctx ()->lookup_type (
impl_block.get_type ()->get_mappings ().get_hirid (), &self_lookup))
{
rust_error_at (impl_block.get_locus (), "failed to resolve type of impl");
return;
}
for (auto &impl_item : impl_block.get_impl_items ())
CompileInherentImplItem::Compile (impl_item.get (), ctx);
}
void
CompileItem::visit (HIR::ExternBlock &extern_block)
{
for (auto &item : extern_block.get_extern_items ())
{
CompileExternItem::compile (item.get (), ctx, concrete);
}
}
void
CompileItem::visit (HIR::Module &module)
{
for (auto &item : module.get_items ())
CompileItem::compile (item.get (), ctx);
}
} // namespace Compile
} // namespace Rust
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