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/Transforms/IPO/ConstantMerge.cpp b/lib/Transforms/IPO/ConstantMerge.cpp
index 988c9e5..d8fae8a 100644
--- a/lib/Transforms/IPO/ConstantMerge.cpp
+++ b/lib/Transforms/IPO/ConstantMerge.cpp
@@ -43,7 +43,7 @@
     // duplicate constants.
     bool runOnModule(Module &M);
 
-    // Return true if we can determine the alignment of this global variable.
+    // Return true iff we can determine the alignment of this global variable.
     bool hasKnownAlignment(GlobalVariable *GV) const;
 
     // Return the alignment of the global, including converting the default