Remove the vector of live vregs. I thought we would need to track

them, but hopefully we won't. And this is not the right data structure
to do it anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117412 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/LiveIntervalUnion.cpp

@@ -25,11 +25,6 @@ using namespace llvm;
 // Consider coalescing adjacent segments to save space, even though it makes
 // extraction more complicated.
 void LiveIntervalUnion::unify(LiveInterval &lvr) {
-  // Add this live virtual register to the union
-  LiveVirtRegs::iterator pos = std::upper_bound(lvrs_.begin(), lvrs_.end(),
-                                                &lvr, less_ptr<LiveInterval>());
-  assert((pos == lvrs_.end() || *pos != &lvr) && "duplicate LVR insertion");
-  lvrs_.insert(pos, &lvr);
   // Insert each of the virtual register's live segments into the map
   SegmentIter segPos = segments_.begin();
   for (LiveInterval::iterator lvrI = lvr.begin(), lvrEnd = lvr.end();

lib/CodeGen/LiveIntervalUnion.h

@@ -97,7 +97,6 @@ public:
 private:
   unsigned repReg_;        // representative register number
   LiveSegments segments_;  // union of virtual reg segements
-  LiveVirtRegs lvrs_;      // set of live virtual regs in the union
 
 public:
   // default ctor avoids placement new