[NFC] Rename DontDeleteUselessPHIs --> KeepOneInputPHIs

llvm-svn: 353801
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
index 00bcb84..dbd8fb7 100644
--- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -3436,7 +3436,7 @@
       KeepEdge2 = nullptr;
     else
       Succ->removePredecessor(OldTerm->getParent(),
-                              /*DontDeleteUselessPHIs=*/true);
+                              /*KeepOneInputPHIs=*/true);
   }
 
   IRBuilder<> Builder(OldTerm);
@@ -5433,7 +5433,7 @@
     // We cached PHINodes in PHIs. To avoid accessing deleted PHINodes later,
     // do not delete PHINodes here.
     SI->getDefaultDest()->removePredecessor(SI->getParent(),
-                                            /*DontDeleteUselessPHIs=*/true);
+                                            /*KeepOneInputPHIs=*/true);
   }
 
   bool ReturnedEarly = false;