229 struct tn {
230 /* offset 0 */
231 union {
232 INT64 value; /* TN_has_value: Integer constant */
233 INT64 offset; /* Offset from symbol (constant) */
234 struct {
235 mTN_NUM number; /* The ID of the register TN */
236 CLASS_REG_PAIR save_creg; /* if save_tn, the corresponding
save_reg */
237 CLASS_REG_PAIR class_reg; /* Dedicated/allocated register ID
238 and register class (see register.h) */
239 } reg_tn;
240 } u1;
My question is about 'save_creg' and 'class_reg'.
Can both of them be valid at the same time? If not, why put them into
a struct reg_tn. It's better to separate them if the size of TN is
considered seriously.
--
Thanks.
Handong
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