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// 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-builtins.h"
namespace Rust {
namespace Compile {
static const int builtin_const = 1 << 0;
static const int builtin_noreturn = 1 << 1;
static const int builtin_novops = 1 << 2;
BuiltinsContext &
BuiltinsContext::get ()
{
static BuiltinsContext instance;
return instance;
}
bool
BuiltinsContext::lookup_simple_builtin (const std::string &name, tree *builtin)
{
auto it = rust_intrinsic_to_gcc_builtin.find (name);
if (it == rust_intrinsic_to_gcc_builtin.end ())
return false;
return lookup_gcc_builtin (it->second, builtin);
}
BuiltinsContext::BuiltinsContext () { setup (); }
void
BuiltinsContext::setup_overflow_fns ()
{
tree overflow_type
= build_varargs_function_type_list (boolean_type_node, NULL_TREE);
define_builtin ("add_overflow", BUILT_IN_ADD_OVERFLOW,
"__builtin_add_overflow", "add_overflow", overflow_type, 0);
define_builtin ("sub_overflow", BUILT_IN_SUB_OVERFLOW,
"__builtin_sub_overflow", "sub_overflow", overflow_type, 0);
define_builtin ("mul_overflow", BUILT_IN_MUL_OVERFLOW,
"__builtin_mul_overflow", "mul_overflow", overflow_type, 0);
}
void
BuiltinsContext::setup_math_fns ()
{
tree math_function_type_f32
= build_function_type_list (float_type_node, float_type_node, NULL_TREE);
define_builtin ("sinf32", BUILT_IN_SINF, "__builtin_sinf", "sinf",
math_function_type_f32, builtin_const);
define_builtin ("sqrtf32", BUILT_IN_SQRTF, "__builtin_sqrtf", "sqrtf",
math_function_type_f32, builtin_const);
}
void
BuiltinsContext::setup ()
{
setup_math_fns ();
setup_overflow_fns ();
define_builtin ("unreachable", BUILT_IN_UNREACHABLE, "__builtin_unreachable",
NULL, build_function_type (void_type_node, void_list_node),
builtin_const | builtin_noreturn);
define_builtin ("abort", BUILT_IN_ABORT, "__builtin_abort", "abort",
build_function_type (void_type_node, void_list_node),
builtin_const | builtin_noreturn);
define_builtin ("breakpoint", BUILT_IN_TRAP, "__builtin_trap", "breakpoint",
build_function_type (void_type_node, void_list_node),
builtin_const | builtin_noreturn);
define_builtin ("memcpy", BUILT_IN_MEMCPY, "__builtin_memcpy", "memcpy",
build_function_type_list (build_pointer_type (void_type_node),
build_pointer_type (void_type_node),
build_pointer_type (void_type_node),
size_type_node, NULL_TREE),
0);
}
static void
handle_flags (tree decl, int flags)
{
if (flags & builtin_const)
TREE_READONLY (decl) = 1;
if (flags & builtin_noreturn)
TREE_READONLY (decl) = 1;
if (flags & builtin_novops)
DECL_IS_NOVOPS (decl) = 1;
}
void
BuiltinsContext::define_builtin (const std::string rust_name,
built_in_function bcode, const char *name,
const char *libname, tree fntype, int flags)
{
tree decl = add_builtin_function (name, fntype, bcode, BUILT_IN_NORMAL,
libname, NULL_TREE);
handle_flags (decl, flags);
set_builtin_decl (bcode, decl, true);
this->builtin_functions_[name] = decl;
if (libname != NULL)
{
decl = add_builtin_function (libname, fntype, bcode, BUILT_IN_NORMAL,
NULL, NULL_TREE);
handle_flags (decl, flags);
this->builtin_functions_[libname] = decl;
}
rust_intrinsic_to_gcc_builtin[rust_name] = name;
}
bool
BuiltinsContext::lookup_gcc_builtin (const std::string &name, tree *builtin)
{
auto it = builtin_functions_.find (name);
if (it == builtin_functions_.end ())
return false;
*builtin = it->second;
return true;
}
} // namespace Compile
} // namespace Rust
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