diff --git a/llvm/lib/CodeGen/LiveRangeUtils.h b/llvm/lib/CodeGen/LiveRangeUtils.h
--- a/llvm/lib/CodeGen/LiveRangeUtils.h
+++ b/llvm/lib/CodeGen/LiveRangeUtils.h
@@ -18,7 +18,7 @@
 namespace llvm {
 
 /// Helper function that distributes live range value numbers and the
-/// corresponding segments of a master live range \p LR to a list of newly
+/// corresponding segments of a primary live range \p LR to a list of newly
 /// created live ranges \p SplitLRs. \p VNIClasses maps each value number in \p
 /// LR to 0 meaning it should stay or to 1..N meaning it should go to a specific
 /// live range in the \p SplitLRs array.