[X86] Fix disassembly of EVEX rounding control and SAE instructions.

Fixes PR31955.

llvm-svn: 316308
diff --git a/llvm/utils/TableGen/X86RecognizableInstr.h b/llvm/utils/TableGen/X86RecognizableInstr.h
index ea99935..24509d1 100644
--- a/llvm/utils/TableGen/X86RecognizableInstr.h
+++ b/llvm/utils/TableGen/X86RecognizableInstr.h
@@ -191,6 +191,8 @@
   bool HasEVEX_KZ;
   /// The hasEVEX_B field from the record
   bool HasEVEX_B;
+  /// Indicates that the instruction uses the L and L' fields for RC.
+  bool EncodeRC;
   /// The isCodeGenOnly field from the record
   bool IsCodeGenOnly;
   /// The ForceDisassemble field from the record