[NFC][TableGen] Print topmost def location for Intrinsics/Insts

llvm/include/llvm/TableGen/Record.h

@@ -1720,6 +1720,12 @@ class Record {
   ArrayRef<SMLoc> getLoc() const { return Locs; }
   void appendLoc(SMLoc Loc) { Locs.push_back(Loc); }
 
+  // Returns the location of the "top" def or defm that instantiated this
+  // concrete record. For a record defined using `def`, this is the location of
+  // the def. For a record defined using `defm`, this is the location of the
+  // topmost/outermost defm that lead to the instantiation of this record.
+  SMLoc getTopDefLoc() const { return Locs.back(); }
+
   ArrayRef<SMLoc> getForwardDeclarationLocs() const {
     return ForwardDeclarationLocs;
   }

llvm/utils/TableGen/Basic/IntrinsicEmitter.cpp

@@ -170,7 +170,7 @@ void IntrinsicEmitter::EmitEnumInfo(const CodeGenIntrinsicTable &Ints,
       OS.indent(40 - Int.EnumName.size());
     OS << formatv(
         " // {} ({})\n", Int.Name,
-        SrcMgr.getFormattedLocationNoOffset(Int.TheDef->getLoc().front()));
+        SrcMgr.getFormattedLocationNoOffset(Int.TheDef->getTopDefLoc()));
   }
 
   // Emit num_intrinsics into the target neutral enum.

llvm/utils/TableGen/InstrInfoEmitter.cpp

@@ -1389,7 +1389,7 @@ void InstrInfoEmitter::emitEnums(
   for (const CodeGenInstruction *Inst : NumberedInstructions) {
     OS << "    " << left_justify(Inst->getName(), MaxNameSize) << " = "
        << Target.getInstrIntValue(Inst->TheDef) << ", // "
-       << SrcMgr.getFormattedLocationNoOffset(Inst->TheDef->getLoc().front())
+       << SrcMgr.getFormattedLocationNoOffset(Inst->TheDef->getTopDefLoc())
        << '\n';
   }
   OS << "    INSTRUCTION_LIST_END = " << NumberedInstructions.size() << '\n';