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

1 files changed, 10 insertions, 0 deletions

diff --git a/utils/TableGen/Record.cpp b/utils/TableGen/Record.cpp
index 0e3593b6a1..55c998926c 100644
--- a/utils/TableGen/Record.cpp
+++ b/utils/TableGen/Record.cpp
@@ -1307,6 +1307,16 @@ void Record::resolveReferencesTo(const RecordVal *RV) {
   }
 }
 
+RecordVal *Record::getDottedValue(StringRef Name) {
+  size_t pos = Name.find('.');
+  if (pos == StringRef::npos)
+    return getValue(Name);
+  RecordVal *RV = getValue(Name.substr(0, pos));
+  if (!RV) return 0;
+  DefInit *DI = dynamic_cast<DefInit*>(RV->getValue());
+  if (!DI) return 0;
+  return DI->getDef()->getDottedValue(Name.substr(pos+1));
+}
 
 void Record::dump() const { errs() << *this; }