Teach TableGen to understand X.Y notation in the TSFlagsFields strings.

Remove much horribleness from X86InstrFormats as a result. Similar
simplifications are probably possible for other targets.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99539 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/InstrInfoEmitter.cpp b/utils/TableGen/InstrInfoEmitter.cpp
index 8f7550b..9bc5459 100644
--- a/utils/TableGen/InstrInfoEmitter.cpp
+++ b/utils/TableGen/InstrInfoEmitter.cpp
@@ -337,7 +337,7 @@
                                         IntInit *ShiftInt, raw_ostream &OS) {
   if (Val == 0 || ShiftInt == 0)
     throw std::string("Illegal value or shift amount in TargetInfo*!");
-  RecordVal *RV = R->getValue(Val->getValue());
+  RecordVal *RV = R->getDottedValue(Val->getValue());
   int Shift = ShiftInt->getValue();
 
   if (RV == 0 || RV->getValue() == 0) {