/* 构造表达式的值,并将其添加到 t,src1,src2三个变量的uses 中 */
void DefineTemp (Symbol t, int op, Symbol src1, Symbol src2)
{
ValueDef def;
CALLOC(def);
def->dst = t;
def->op = op;
def->src1 = src1;
def->src2 = src2;
def->ownBB = CurrentBB;
/* 赋值和函数调用 */
if (op == MOV || op == CALL) {
/* 将值添加到变量t 中 */
def->link = AsVar(t)->def;
AsVar(t)->def = def;
return;
}
/* 如果src1 和src2是变量则将值添加进去 */
if (src1->kind == SK_Variable) {
TrackValueUse (src1, def);
}
if (src2 && src2->kind == SK_Variable) {
TrackValueUse (src2, def);
}
AsVar(t)->def = def;
}
void DefineTemp(Symbol t, int op, Symbol src1, Symbol src2)
{
ValueDef def;
ALLOC(def);
def->dst = t;
def->op = op;
def->src1 = src1;
def->src2 = src2;
def->ownBB = CurrentBB;
if (op == MOV || op == CALL)
{
def->link = AsVar(t)->def;
AsVar(t)->def = def;
return;
}
if (src1->kind == SK_Variable)
{
TrackValueUse(src1, def);
}
if (src2 && src2->kind == SK_Variable)
{
TrackValueUse(src2, def);
}
AsVar(t)->def = def;
}