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

2 files changed, 2 insertions, 2 deletions

diff --git a/utils/TableGen/CodeGenRegisters.cpp b/utils/TableGen/CodeGenRegisters.cpp
index 01deaab53f..f195b4e3fa 100644
--- a/utils/TableGen/CodeGenRegisters.cpp
+++ b/utils/TableGen/CodeGenRegisters.cpp
@@ -532,7 +532,7 @@ CodeGenRegister::addSubRegsPreOrder(SetVector<const CodeGenRegister*> &OSet,
 //
 // Alternatively:
 //
-//    overlap(A, B) if there exists:
+//    overlap(A, B) iff there exists:
 //    A' in { A, subregs(A) } and B' in { B, subregs(B) } such that:
 //    A' = B' or A' in aliases(B') or B' in aliases(A').
 //
diff --git a/utils/TableGen/CodeGenRegisters.h b/utils/TableGen/CodeGenRegisters.h
index 3bd4b09946..e411074156 100644
--- a/utils/TableGen/CodeGenRegisters.h
+++ b/utils/TableGen/CodeGenRegisters.h
@@ -183,7 +183,7 @@ namespace llvm {
     bool inheritRegUnits(CodeGenRegBank &RegBank);
 
     // Adopt a register unit for pressure tracking.
-    // A unit is adopted if its unit number is >= NumNativeRegUnits.
+    // A unit is adopted iff its unit number is >= NumNativeRegUnits.
     void adoptRegUnit(unsigned RUID) { RegUnits.push_back(RUID); }
 
     // Get the sum of this register's register unit weights.