+ /// LRCalc - Cache for computing live ranges and SSA update. Each instance
+ /// can only handle non-overlapping live ranges, so use a separate
+ /// LiveRangeCalc instance for the complement interval when in spill mode.
+ LiveRangeCalc LRCalc[2];
+
+ /// getLRCalc - Return the LRCalc to use for RegIdx. In spill mode, the
+ /// complement interval can overlap the other intervals, so it gets its own
+ /// LRCalc instance. When not in spill mode, all intervals can share one.
+ LiveRangeCalc &getLRCalc(unsigned RegIdx) {
+ return LRCalc[SpillMode != SM_Partition && RegIdx != 0];
+ }