static bool
fold_const_builtin_load_exponent (real_value *result, const real_value *arg0,
const wide_int_ref &arg1,
const real_format *format)
{
/* Bound the maximum adjustment to twice the range of the
mode's valid exponents. Use abs to ensure the range is
positive as a sanity check. */
int max_exp_adj = 2 * labs (format->emax - format->emin);
/* The requested adjustment must be inside this range. This
is a preliminary cap to avoid things like overflow, we
may still fail to compute the result for other reasons. */
if (wi::les_p (arg1, -max_exp_adj) || wi::ges_p (arg1, max_exp_adj))
return false;
REAL_VALUE_TYPE initial_result;
real_ldexp (&initial_result, arg0, arg1.to_shwi ());
/* Ensure we didn't overflow. */
if (real_isinf (&initial_result))
return false;
/* Only proceed if the target mode can hold the
resulting value. */
*result = real_value_truncate (format, initial_result);
return real_equal (&initial_result, result);
}
static bool
ortho_init (void)
{
tree n;
input_location = BUILTINS_LOCATION;
/* Create a global binding. */
push_binding ();
build_common_tree_nodes (0);
size_type_node = type_for_size (GET_MODE_BITSIZE (Pmode), 1);
set_sizetype (size_type_node);
build_common_tree_nodes_2 (0);
n = build_decl (UNKNOWN_LOCATION, TYPE_DECL, get_identifier ("int"), integer_type_node);
push_decl (n);
n = build_decl (UNKNOWN_LOCATION, TYPE_DECL, get_identifier ("char"), char_type_node);
push_decl (n);
/* Create alloca builtin. */
{
tree args_type = tree_cons (NULL_TREE, size_type_node, void_list_node);
tree func_type = build_function_type (ptr_type_node, args_type);
implicit_built_in_decls[BUILT_IN_ALLOCA] = builtin_function
("__builtin_alloca", func_type,
BUILT_IN_ALLOCA, BUILT_IN_NORMAL, NULL, NULL_TREE);
stack_alloc_function_ptr = build1
(ADDR_EXPR,
build_pointer_type (func_type),
implicit_built_in_decls[BUILT_IN_ALLOCA]);
}
{
tree ptr_ftype = build_function_type (ptr_type_node, NULL_TREE);
implicit_built_in_decls[BUILT_IN_STACK_SAVE] = builtin_function
("__builtin_stack_save", ptr_ftype,
BUILT_IN_STACK_SAVE, BUILT_IN_NORMAL, NULL, NULL_TREE);
}
{
tree ftype_ptr;
ftype_ptr = build_function_type
(void_type_node,
tree_cons (NULL_TREE, ptr_type_node, NULL_TREE));
implicit_built_in_decls[BUILT_IN_STACK_RESTORE] = builtin_function
("__builtin_stack_restore", ftype_ptr,
BUILT_IN_STACK_RESTORE, BUILT_IN_NORMAL, NULL, NULL_TREE);
}
{
REAL_VALUE_TYPE v;
REAL_VALUE_FROM_INT (v, 1, 0, DFmode);
real_ldexp (&fp_const_p5, &v, -1);
REAL_VALUE_FROM_INT (v, -1, -1, DFmode);
real_ldexp (&fp_const_m_p5, &v, -1);
REAL_VALUE_FROM_INT (fp_const_zero, 0, 0, DFmode);
}
ortho_fe_init ();
return true;
}
static bool
ortho_init (void)
{
tree n;
input_location = BUILTINS_LOCATION;
/* Create a global binding. Don't use push_binding, as neither a BLOCK nor
a BIND_EXPR are needed. */
push_binding (GLOBAL_BINDING);
build_common_tree_nodes (0, 0);
n = build_decl (input_location,
TYPE_DECL, get_identifier ("int"), integer_type_node);
pushdecl (n);
n = build_decl (input_location,
TYPE_DECL, get_identifier ("char"), char_type_node);
pushdecl (n);
/* Create alloca builtin. */
{
tree args_type = tree_cons (NULL_TREE, size_type_node, void_list_node);
tree func_type = build_function_type (ptr_type_node, args_type);
define_builtin ("__builtin_alloca", func_type,
BUILT_IN_ALLOCA, NULL, 0);
stack_alloc_function_ptr = build1
(ADDR_EXPR,
build_pointer_type (func_type),
builtin_decl_implicit (BUILT_IN_ALLOCA));
}
{
tree ptr_ftype = build_function_type (ptr_type_node, NULL_TREE);
define_builtin ("__builtin_stack_save", ptr_ftype,
BUILT_IN_STACK_SAVE, NULL, 0);
}
{
tree ftype_ptr = build_function_type_list (void_type_node,
ptr_type_node, NULL_TREE);
define_builtin ("__builtin_stack_restore", ftype_ptr,
BUILT_IN_STACK_RESTORE, NULL, 0);
}
{
tree ftype_ptr = build_function_type_list (void_type_node, NULL_TREE);
define_builtin ("__builtin_trap", ftype_ptr,
BUILT_IN_TRAP, NULL, ECF_NOTHROW | ECF_LEAF);
TREE_THIS_VOLATILE (builtin_decl_explicit (BUILT_IN_TRAP)) = 1;
}
{
REAL_VALUE_TYPE v;
REAL_VALUE_FROM_INT (v, 1, 0, DFmode);
real_ldexp (&fp_const_p5, &v, -1);
REAL_VALUE_FROM_INT (v, -1, -1, DFmode);
real_ldexp (&fp_const_m_p5, &v, -1);
REAL_VALUE_FROM_INT (fp_const_zero, 0, 0, DFmode);
}
build_common_builtin_nodes ();
// FIXME: this MAY remove the need for creating the builtins above...
// Evaluate tree.c / build_common_builtin_nodes (); for each in turn.
return true;
}
