static bool
verify_ssa_name (tree ssa_name, bool is_virtual)
{
if (TREE_CODE (ssa_name) != SSA_NAME)
{
error ("expected an SSA_NAME object");
return true;
}
if (TREE_TYPE (ssa_name) != TREE_TYPE (SSA_NAME_VAR (ssa_name)))
{
error ("type mismatch between an SSA_NAME and its symbol");
return true;
}
if (SSA_NAME_IN_FREE_LIST (ssa_name))
{
error ("found an SSA_NAME that had been released into the free pool");
return true;
}
if (is_virtual && is_gimple_reg (ssa_name))
{
error ("found a virtual definition for a GIMPLE register");
return true;
}
if (!is_virtual && !is_gimple_reg (ssa_name))
{
error ("found a real definition for a non-register");
return true;
}
if (is_virtual && var_ann (SSA_NAME_VAR (ssa_name))
&& get_subvars_for_var (SSA_NAME_VAR (ssa_name)) != NULL)
{
error ("found real variable when subvariables should have appeared");
return true;
}
return false;
}
static bool
dest_safe_for_nrv_p (tree dest)
{
switch (TREE_CODE (dest))
{
case VAR_DECL:
{
subvar_t subvar;
if (is_call_clobbered (dest))
return false;
for (subvar = get_subvars_for_var (dest);
subvar;
subvar = subvar->next)
if (is_call_clobbered (subvar->var))
return false;
return true;
}
case ARRAY_REF:
case COMPONENT_REF:
return dest_safe_for_nrv_p (TREE_OPERAND (dest, 0));
default:
return false;
}
}