1 files changed, 5 insertions, 1 deletions
diff --git a/ssa.h b/ssa.h
index 722545d..3699b9d 100644
--- a/ssa.h
+++ b/ssa.h
@@ -34,20 +34,24 @@ struct COpr {
     int dep;
     int mod;
     int reg;        /* -1 for spilled, -2 for discarded */
+    int begin, end; /* for reg allocation */
     CType_t type;
     CInst_t def;
     CRange_t range;
     COpr_t par;     /* union-find */
     COpr_t cval;
+    COpr_t spill;   /* check this reference if spilled */
 };
 
 typedef struct COList COList;
 typedef COList *COList_t;
 struct COList {
     COpr_t opr;
-    COList_t next;
+    COList_t next, prev;
 };
 
+void colist_remove(COList_t node);
+
 struct CInst {
     enum {
         BEQZ,   /* conditional jump */