Revert 'Fix a typo 'iff' => 'if''. iff is an abreviation of if and only if. See: http://en.wikipedia.org/wiki/If_and_only_if Commit 164767

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164768 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/LazyValueInfo.cpp b/lib/Analysis/LazyValueInfo.cpp
index d6dd627..ec618fa 100644
--- a/lib/Analysis/LazyValueInfo.cpp
+++ b/lib/Analysis/LazyValueInfo.cpp
@@ -1109,14 +1109,14 @@
     // If this is an equality comparison, we can try to fold it knowing that
     // "V != C1".
     if (Pred == ICmpInst::ICMP_EQ) {
-      // !C1 == C -> false if C1 == C.
+      // !C1 == C -> false iff C1 == C.
       Res = ConstantFoldCompareInstOperands(ICmpInst::ICMP_NE,
                                             Result.getNotConstant(), C, TD,
                                             TLI);
       if (Res->isNullValue())
         return False;
     } else if (Pred == ICmpInst::ICMP_NE) {
-      // !C1 != C -> true if C1 == C.
+      // !C1 != C -> true iff C1 == C.
       Res = ConstantFoldCompareInstOperands(ICmpInst::ICMP_NE,
                                             Result.getNotConstant(), C, TD,
                                             TLI);