[TableGen] Fix reporting from CodeGenSchedModels::checkCompleteness().

Make the check for a complete SchedModel work as expected: report any
supported instruction not having scheduler info.

For unclear reasons there was a variable 'HadCompleteModel' that caused
e.g. new instructions for a new subtarget not to be reported. This variable
is now simply removed as all in-tree targets seem to build fine without it.

Review: Simon Pilgrim

Differential Revision: https://reviews.llvm.org/D118628

Author: JonPsson

llvm/utils/TableGen/CodeGenSchedule.cpp

@@ -1982,7 +1982,6 @@ void CodeGenSchedModels::collectProcResources() {
 
 void CodeGenSchedModels::checkCompleteness() {
   bool Complete = true;
-  bool HadCompleteModel = false;
   for (const CodeGenProcModel &ProcModel : procModels()) {
     const bool HasItineraries = ProcModel.hasItineraries();
     if (!ProcModel.ModelDef->getValueAsBit("CompleteModel"))
@@ -1994,7 +1993,7 @@ void CodeGenSchedModels::checkCompleteness() {
         continue;
       unsigned SCIdx = getSchedClassIdx(*Inst);
       if (!SCIdx) {
-        if (Inst->TheDef->isValueUnset("SchedRW") && !HadCompleteModel) {
+        if (Inst->TheDef->isValueUnset("SchedRW")) {
           PrintError(Inst->TheDef->getLoc(),
                      "No schedule information for instruction '" +
                          Inst->TheDef->getName() + "' in SchedMachineModel '" +
@@ -2022,7 +2021,6 @@ void CodeGenSchedModels::checkCompleteness() {
         Complete = false;
       }
     }
-    HadCompleteModel = true;
   }
   if (!Complete) {
     errs() << "\n\nIncomplete schedule models found.\n"