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// Copyright (C) 2020-2022 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-base.h"
#include "fold-const.h"
#include "stringpool.h"
namespace Rust {
namespace Compile {
void
HIRCompileBase::setup_attributes_on_fndecl (
tree fndecl, bool is_main_entry_point, bool has_visibility,
const HIR::FunctionQualifiers &qualifiers, const AST::AttrVec &attrs)
{
// if its the main fn or pub visibility mark its as DECL_PUBLIC
// please see https://github.com/Rust-GCC/gccrs/pull/137
if (is_main_entry_point || has_visibility)
{
TREE_PUBLIC (fndecl) = 1;
}
// is it a const fn
if (qualifiers.is_const ())
{
TREE_READONLY (fndecl) = 1;
}
// is it inline?
for (const auto &attr : attrs)
{
bool is_inline = attr.get_path ().as_string ().compare ("inline") == 0;
if (is_inline)
{
DECL_DECLARED_INLINE_P (fndecl) = 1;
// do we want to force inline regardless of optimisation level?
// https://gcc.gnu.org/onlinedocs/gcc/Inline.html
//
// /* Add attribute "always_inline": */
// DECL_ATTRIBUTES (fndecl)
// = tree_cons (get_identifier ("always_inline"), NULL,
// DECL_ATTRIBUTES (fndecl));
}
}
}
void
HIRCompileBase::setup_abi_options (tree fndecl, ABI abi)
{
switch (abi)
{
case Rust::ABI::RUST:
case Rust::ABI::INTRINSIC:
case Rust::ABI::C:
case Rust::ABI::CDECL:
DECL_ATTRIBUTES (fndecl)
= tree_cons (get_identifier ("cdecl"), NULL, DECL_ATTRIBUTES (fndecl));
break;
case Rust::ABI::STDCALL:
DECL_ATTRIBUTES (fndecl) = tree_cons (get_identifier ("stdcall"), NULL,
DECL_ATTRIBUTES (fndecl));
break;
case Rust::ABI::FASTCALL:
DECL_ATTRIBUTES (fndecl) = tree_cons (get_identifier ("fastcall"), NULL,
DECL_ATTRIBUTES (fndecl));
break;
default:
break;
}
}
// ported from gcc/c/c-typecheck.c
//
// Mark EXP saying that we need to be able to take the
// address of it; it should not be allocated in a register.
// Returns true if successful. ARRAY_REF_P is true if this
// is for ARRAY_REF construction - in that case we don't want
// to look through VIEW_CONVERT_EXPR from VECTOR_TYPE to ARRAY_TYPE,
// it is fine to use ARRAY_REFs for vector subscripts on vector
// register variables.
bool
HIRCompileBase::mark_addressable (tree exp, Location locus)
{
tree x = exp;
while (1)
switch (TREE_CODE (x))
{
case VIEW_CONVERT_EXPR:
if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE
&& VECTOR_TYPE_P (TREE_TYPE (TREE_OPERAND (x, 0))))
return true;
x = TREE_OPERAND (x, 0);
break;
case COMPONENT_REF:
// TODO
// if (DECL_C_BIT_FIELD (TREE_OPERAND (x, 1)))
// {
// error ("cannot take address of bit-field %qD", TREE_OPERAND (x,
// 1)); return false;
// }
/* FALLTHRU */
case ADDR_EXPR:
case ARRAY_REF:
case REALPART_EXPR:
case IMAGPART_EXPR:
x = TREE_OPERAND (x, 0);
break;
case COMPOUND_LITERAL_EXPR:
TREE_ADDRESSABLE (x) = 1;
TREE_ADDRESSABLE (COMPOUND_LITERAL_EXPR_DECL (x)) = 1;
return true;
case CONSTRUCTOR:
TREE_ADDRESSABLE (x) = 1;
return true;
case VAR_DECL:
case CONST_DECL:
case PARM_DECL:
case RESULT_DECL:
// (we don't have a concept of a "register" declaration)
// fallthrough */
/* FALLTHRU */
case FUNCTION_DECL:
TREE_ADDRESSABLE (x) = 1;
/* FALLTHRU */
default:
return true;
}
return false;
}
tree
HIRCompileBase::address_expression (tree expr, Location location)
{
if (expr == error_mark_node)
return error_mark_node;
if (!mark_addressable (expr, location))
return error_mark_node;
return build_fold_addr_expr_loc (location.gcc_location (), expr);
}
} // namespace Compile
} // namespace Rust
|
