[TableGen][X86] Add an llvm_unreachable to a switch so we get an error if we need...

llvm-svn: 304097

diff --git a/llvm/utils/TableGen/X86FoldTablesEmitter.cpp b/llvm/utils/TableGen/X86FoldTablesEmitter.cpp
index 1495b0b..b3be593 100644 (file)
--- a/llvm/utils/TableGen/X86FoldTablesEmitter.cpp
+++ b/llvm/utils/TableGen/X86FoldTablesEmitter.cpp
@@ -585,6 +585,7 @@ void X86FoldTablesEmitter::updateTables(const CodeGenInstruction *RegInstr,
       Record *MemOpRec = MemInstr->Operands[i].Rec;
       if (isRegisterOperand(RegOpRec) && isMemoryOperand(MemOpRec)) {
         switch (i) {
+        default: llvm_unreachable("Unexpected operand count!");
         case 0:
           addEntryWithFlags(Table0, RegInstr, MemInstr, S, 0);
           return;