diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
index d0a6cced1b197..4dfd0358a16fd 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -1067,9 +1067,7 @@ bool PPCInstrInfo::isReallyTriviallyReMaterializable(
     const MachineInstr &MI) const {
   switch (MI.getOpcode()) {
   default:
-    // This function should only be called for opcodes with the ReMaterializable
-    // flag set.
-    llvm_unreachable("Unknown rematerializable operation!");
+    // Let base implementaion decide.
     break;
   case PPC::LI:
   case PPC::LI8: