Fix a bug in LazyValueInfo that CorrelatedValuePropagation exposed: In the LVI lattice, undef and the full set ConstantRange should not

be treated as equivalent.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112843 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/LazyValueInfo.cpp

@@ -173,10 +173,6 @@ public:
     assert(isUndefined());
     if (NewR.isEmptySet())
       return markOverdefined();
-    else if (NewR.isFullSet()) {
-      Tag = undefined;
-      return true;
-    }
     
     Tag = constantrange;
     Range = NewR;