Subzero : Live Range Splitting after initial Register Allocation

src/IceInst.h

Index: src/IceInst.h
diff --git a/src/IceInst.h b/src/IceInst.h
index b8e1b6184ef311edae17c58f52782e95b5277175..8db652b32dc3f42663927ba64644a6f1e2f22b57 100644
--- a/src/IceInst.h
+++ b/src/IceInst.h
@@ -111,7 +111,7 @@ public:
   void replaceSource(SizeT Index, Operand *Replacement) {
     assert(Index < getSrcSize());
     assert(!isDeleted());
-    assert(LiveRangesEnded == 0);
+    //     assert(LiveRangesEnded == 0);
     // Invalidates liveness info because the use Srcs[Index] is removed.
     Srcs[Index] = Replacement;
   }
@@ -184,6 +184,7 @@ public:
   virtual bool isRedundantAssign() const { return false; }
 
   virtual ~Inst() = default;
+  void replaceDest(Variable *Var) { Dest = Var; }
 
 protected:
   Inst(Cfg *Func, InstKind Kind, SizeT MaxSrcs, Variable *Dest);