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// Copyright (C) 2020-2021 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/>.
#ifndef RUST_COMPILE_EXTERN_ITEM
#define RUST_COMPILE_EXTERN_ITEM
#include "rust-compile-base.h"
#include "rust-compile-intrinsic.h"
#include "rust-compile-tyty.h"
#include "rust-compile-implitem.h"
#include "rust-compile-var-decl.h"
#include "rust-compile-stmt.h"
#include "rust-compile-expr.h"
#include "rust-compile-fnparam.h"
namespace Rust {
namespace Compile {
class CompileExternItem : public HIRCompileBase
{
using Rust::Compile::HIRCompileBase::visit;
public:
static void compile (HIR::ExternalItem *item, Context *ctx,
bool compile_fns = true,
TyTy::BaseType *concrete = nullptr)
{
CompileExternItem compiler (ctx, compile_fns, concrete);
item->accept_vis (compiler);
}
void visit (HIR::ExternalStaticItem &item) override
{
TyTy::BaseType *resolved_type = nullptr;
bool ok = ctx->get_tyctx ()->lookup_type (item.get_mappings ().get_hirid (),
&resolved_type);
rust_assert (ok);
std::string name = item.get_item_name ();
// FIXME this is assuming C ABI
std::string asm_name = name;
Btype *type = TyTyResolveCompile::compile (ctx, resolved_type);
bool is_external = true;
bool is_hidden = false;
bool in_unique_section = false;
Bvariable *static_global
= ctx->get_backend ()->global_variable (name, asm_name, type, is_external,
is_hidden, in_unique_section,
item.get_locus ());
ctx->insert_var_decl (item.get_mappings ().get_hirid (), static_global);
ctx->push_var (static_global);
}
void visit (HIR::ExternalFunctionItem &function) override
{
if (!compile_fns)
return;
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_subsititions_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);
}
}
// 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.
Bfunction *lookup = nullptr;
if (ctx->lookup_function_decl (fntype->get_ty_ref (), &lookup,
fntype->get_id (), fntype))
{
// has this been added to the list then it must be finished
if (ctx->function_completed (lookup))
{
Bfunction *dummy = nullptr;
if (!ctx->lookup_function_decl (fntype->get_ty_ref (), &dummy))
ctx->insert_function_decl (fntype, lookup);
return;
}
}
if (fntype->has_subsititions_defined ())
{
// override the Hir Lookups for the substituions in this context
fntype->override_context ();
}
if (fntype->get_abi () == ABI::INTRINSIC)
{
Intrinsics compile (ctx);
Bfunction *fndecl = compile.compile (fntype);
ctx->insert_function_decl (fntype, fndecl);
return;
}
::Btype *compiled_fn_type = TyTyResolveCompile::compile (ctx, fntype);
compiled_fn_type
= ctx->get_backend ()->specify_abi_attribute (compiled_fn_type,
fntype->get_abi ());
const unsigned int flags
= Backend::function_is_declaration | Backend::function_is_visible;
std::string ir_symbol_name = function.get_item_name ();
std::string asm_name = function.get_item_name ();
Bfunction *fndecl
= ctx->get_backend ()->function (compiled_fn_type, ir_symbol_name,
asm_name, flags, function.get_locus ());
ctx->insert_function_decl (fntype, fndecl);
}
private:
CompileExternItem (Context *ctx, bool compile_fns, TyTy::BaseType *concrete)
: HIRCompileBase (ctx), compile_fns (compile_fns), concrete (concrete)
{}
bool compile_fns;
TyTy::BaseType *concrete;
};
} // namespace Compile
} // namespace Rust
#endif // RUST_COMPILE_EXTERN_ITEM
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