[llvm] r288767 - [LVI] Remove dead code in mergeIn

[Philip Reames via llvm-commits]

Author: reames
Date: Mon Dec  5 21:34:33 2016
New Revision: 288767

URL: http://llvm.org/viewvc/llvm-project?rev=288767&view=rev
Log:
[LVI] Remove dead code in mergeIn

Integers are expressed in the lattice via constant ranges.  They can never be represented by constants or not-constants; those are reserved for non-integer types.  This code has been dead for literaly years.


Modified:
    llvm/trunk/lib/Analysis/LazyValueInfo.cpp

Modified: llvm/trunk/lib/Analysis/LazyValueInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/LazyValueInfo.cpp?rev=288767&r1=288766&r2=288767&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/LazyValueInfo.cpp (original)
+++ llvm/trunk/lib/Analysis/LazyValueInfo.cpp Mon Dec  5 21:34:33 2016
@@ -228,15 +228,6 @@ public:
       if (RHS.isNotConstant()) {
         if (Val == RHS.Val)
           return markOverdefined();
-
-        // Unless we can prove that the two Constants are different, we must
-        // move to overdefined.
-        if (ConstantInt *Res =
-                dyn_cast<ConstantInt>(ConstantFoldCompareInstOperands(
-                    CmpInst::ICMP_NE, getConstant(), RHS.getNotConstant(), DL)))
-          if (Res->isOne())
-            return markNotConstant(RHS.getNotConstant());
-
         return markOverdefined();
       }
 
@@ -247,15 +238,6 @@ public:
       if (RHS.isConstant()) {
         if (Val == RHS.Val)
           return markOverdefined();
-
-        // Unless we can prove that the two Constants are different, we must
-        // move to overdefined.
-        if (ConstantInt *Res =
-                dyn_cast<ConstantInt>(ConstantFoldCompareInstOperands(
-                    CmpInst::ICMP_NE, getNotConstant(), RHS.getConstant(), DL)))
-          if (Res->isOne())
-            return false;
-
         return markOverdefined();
       }