Remove SlotIndex::PHI_BIT. It is no longer used by anything.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114779 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 2726fc3..d30596a 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -393,8 +393,7 @@
       // Create interval with one of a NEW value number.  Note that this value
       // number isn't actually defined by an instruction, weird huh? :)
       if (PHIJoin) {
-        ValNo = interval.getNextValue(SlotIndex(Start, true), 0, false,
-                                      VNInfoAllocator);
+        ValNo = interval.getNextValue(Start, 0, false, VNInfoAllocator);
         ValNo->setIsPHIDef(true);
       }
       LiveRange LR(Start, killIdx, ValNo);
@@ -673,8 +672,7 @@
   }
 
   VNInfo *vni =
-    interval.getNextValue(SlotIndex(getMBBStartIdx(MBB), true),
-                          0, false, VNInfoAllocator);
+    interval.getNextValue(getMBBStartIdx(MBB), 0, false, VNInfoAllocator);
   vni->setIsPHIDef(true);
   LiveRange LR(start, end, vni);