static void
parse_ssa_operands (gimple stmt)
{
enum gimple_code code = gimple_code (stmt);
if (code == GIMPLE_ASM)
get_asm_expr_operands (stmt);
else if (is_gimple_debug (stmt))
{
if (gimple_debug_bind_p (stmt)
&& gimple_debug_bind_has_value_p (stmt))
get_expr_operands (stmt, gimple_debug_bind_get_value_ptr (stmt),
opf_use | opf_no_vops);
}
else
{
size_t i, start = 0;
if (code == GIMPLE_ASSIGN || code == GIMPLE_CALL)
{
get_expr_operands (stmt, gimple_op_ptr (stmt, 0), opf_def);
start = 1;
}
for (i = start; i < gimple_num_ops (stmt); i++)
get_expr_operands (stmt, gimple_op_ptr (stmt, i), opf_use);
/* Add call-clobbered operands, if needed. */
if (code == GIMPLE_CALL)
maybe_add_call_vops (stmt);
if (code == GIMPLE_RETURN)
append_vuse (gimple_vop (cfun));
}
}
static tree
scan_function (tree *tp,
int *walk_subtrees,
void *data)
{
struct cgraph_node *fn = data;
tree t = *tp;
funct_state local = get_function_state (fn);
switch (TREE_CODE (t))
{
case VAR_DECL:
if (DECL_INITIAL (t))
walk_tree (&DECL_INITIAL (t), scan_function, fn, visited_nodes);
*walk_subtrees = 0;
break;
case MODIFY_EXPR:
{
/* First look on the lhs and see what variable is stored to */
tree lhs = TREE_OPERAND (t, 0);
tree rhs = TREE_OPERAND (t, 1);
check_lhs_var (local, lhs);
/* For the purposes of figuring out what the cast affects */
/* Next check the operands on the rhs to see if they are ok. */
switch (TREE_CODE_CLASS (TREE_CODE (rhs)))
{
case tcc_binary:
{
tree op0 = TREE_OPERAND (rhs, 0);
tree op1 = TREE_OPERAND (rhs, 1);
check_rhs_var (local, op0);
check_rhs_var (local, op1);
}
break;
case tcc_unary:
{
tree op0 = TREE_OPERAND (rhs, 0);
check_rhs_var (local, op0);
}
break;
case tcc_reference:
check_rhs_var (local, rhs);
break;
case tcc_declaration:
check_rhs_var (local, rhs);
break;
case tcc_expression:
switch (TREE_CODE (rhs))
{
case ADDR_EXPR:
check_rhs_var (local, rhs);
break;
case CALL_EXPR:
check_call (local, rhs);
break;
default:
break;
}
break;
default:
break;
}
*walk_subtrees = 0;
}
break;
case ADDR_EXPR:
/* This case is here to find addresses on rhs of constructors in
decl_initial of static variables. */
check_rhs_var (local, t);
*walk_subtrees = 0;
break;
case LABEL_EXPR:
if (DECL_NONLOCAL (TREE_OPERAND (t, 0)))
/* Target of long jump. */
local->pure_const_state = IPA_NEITHER;
break;
case CALL_EXPR:
check_call (local, t);
*walk_subtrees = 0;
break;
case ASM_EXPR:
get_asm_expr_operands (local, t);
*walk_subtrees = 0;
break;
default:
break;
}
return NULL;
}
static tree
scan_for_static_refs (tree *tp,
int *walk_subtrees,
void *data)
{
struct cgraph_node *fn = (struct cgraph_node *) data;
tree t = *tp;
ipa_reference_local_vars_info_t local = NULL;
if (fn)
local = get_reference_vars_info_from_cgraph (fn)->local;
switch (TREE_CODE (t))
{
case VAR_DECL:
if (DECL_INITIAL (t))
walk_tree (&DECL_INITIAL (t), scan_for_static_refs, fn, visited_nodes);
*walk_subtrees = 0;
break;
case GIMPLE_MODIFY_STMT:
{
/* First look on the lhs and see what variable is stored to */
tree lhs = GIMPLE_STMT_OPERAND (t, 0);
tree rhs = GIMPLE_STMT_OPERAND (t, 1);
check_lhs_var (local, lhs);
/* For the purposes of figuring out what the cast affects */
/* Next check the operands on the rhs to see if they are ok. */
switch (TREE_CODE_CLASS (TREE_CODE (rhs)))
{
case tcc_binary:
case tcc_comparison:
{
tree op0 = TREE_OPERAND (rhs, 0);
tree op1 = TREE_OPERAND (rhs, 1);
check_rhs_var (local, op0);
check_rhs_var (local, op1);
}
break;
case tcc_unary:
{
tree op0 = TREE_OPERAND (rhs, 0);
check_rhs_var (local, op0);
}
break;
case tcc_reference:
check_rhs_var (local, rhs);
break;
case tcc_declaration:
check_rhs_var (local, rhs);
break;
case tcc_expression:
switch (TREE_CODE (rhs))
{
case ADDR_EXPR:
check_rhs_var (local, rhs);
break;
default:
break;
}
break;
case tcc_vl_exp:
switch (TREE_CODE (rhs))
{
case CALL_EXPR:
check_call (local, rhs);
break;
default:
break;
}
break;
default:
break;
}
*walk_subtrees = 0;
}
break;
case ADDR_EXPR:
/* This case is here to find addresses on rhs of constructors in
decl_initial of static variables. */
check_rhs_var (local, t);
*walk_subtrees = 0;
break;
case LABEL_EXPR:
if (DECL_NONLOCAL (TREE_OPERAND (t, 0)))
{
/* Target of long jump. */
local->calls_read_all = true;
local->calls_write_all = true;
}
break;
case CALL_EXPR:
check_call (local, t);
*walk_subtrees = 0;
break;
case ASM_EXPR:
get_asm_expr_operands (local, t);
*walk_subtrees = 0;
break;
default:
break;
}
return NULL;
}