Remove exception handling usage from tblgen.

Most places can use PrintFatalError as the unwinding mechanism was not
used for anything other than printing the error. The single exception
was CodeGenDAGPatterns.cpp, where intermediate errors during type
resolution were ignored to simplify incremental platform development.
This use is replaced by an error flag in TreePattern and bailout earlier
in various places if it is set. 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166712 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 30 insertions, 28 deletions

diff --git a/utils/TableGen/CodeGenSchedule.cpp b/utils/TableGen/CodeGenSchedule.cpp
index 1cca3e3..a8c9392 100644
--- a/utils/TableGen/CodeGenSchedule.cpp
+++ b/utils/TableGen/CodeGenSchedule.cpp
@@ -63,7 +63,7 @@ struct InstRegexOp : public SetTheory::Operator {
            AI = Expr->arg_begin(), AE = Expr->arg_end(); AI != AE; ++AI) {
       StringInit *SI = dyn_cast<StringInit>(*AI);
       if (!SI)
-        throw TGError(Loc, "instregex requires pattern string: "
+        PrintFatalError(Loc, "instregex requires pattern string: "
           + Expr->getAsString());
       std::string pat = SI->getValue();
       // Implement a python-style prefix match.
@@ -268,13 +268,13 @@ void CodeGenSchedModels::collectSchedRW() {
     Record *AliasDef = (*AI)->getValueAsDef("AliasRW");
     if (MatchDef->isSubClassOf("SchedWrite")) {
       if (!AliasDef->isSubClassOf("SchedWrite"))
-        throw TGError((*AI)->getLoc(), "SchedWrite Alias must be SchedWrite");
+        PrintFatalError((*AI)->getLoc(), "SchedWrite Alias must be SchedWrite");
       scanSchedRW(AliasDef, SWDefs, RWSet);
     }
     else {
       assert(MatchDef->isSubClassOf("SchedRead") && "Unknown SchedReadWrite");
       if (!AliasDef->isSubClassOf("SchedRead"))
-        throw TGError((*AI)->getLoc(), "SchedRead Alias must be SchedRead");
+        PrintFatalError((*AI)->getLoc(), "SchedRead Alias must be SchedRead");
       scanSchedRW(AliasDef, SRDefs, RWSet);
     }
   }
@@ -305,7 +305,7 @@ void CodeGenSchedModels::collectSchedRW() {
     Record *MatchDef = (*AI)->getValueAsDef("MatchRW");
     CodeGenSchedRW &RW = getSchedRW(MatchDef);
     if (RW.IsAlias)
-      throw TGError((*AI)->getLoc(), "Cannot Alias an Alias");
+      PrintFatalError((*AI)->getLoc(), "Cannot Alias an Alias");
     RW.Aliases.push_back(*AI);
   }
   DEBUG(
@@ -437,9 +437,9 @@ void CodeGenSchedModels::expandRWSeqForProc(
         continue;
     }
     if (AliasDef)
-      throw TGError(AliasRW.TheDef->getLoc(), "Multiple aliases "
-                    "defined for processor " + ProcModel.ModelName +
-                    " Ensure only one SchedAlias exists per RW.");
+      PrintFatalError(AliasRW.TheDef->getLoc(), "Multiple aliases "
+                      "defined for processor " + ProcModel.ModelName +
+                      " Ensure only one SchedAlias exists per RW.");
     AliasDef = AliasRW.TheDef;
   }
   if (AliasDef) {
@@ -706,7 +706,7 @@ void CodeGenSchedModels::createInstRWClass(Record *InstRWDef) {
   // Sort Instrs into sets.
   const RecVec *InstDefs = Sets.expand(InstRWDef);
   if (InstDefs->empty())
-    throw TGError(InstRWDef->getLoc(), "No matching instruction opcodes");
+    PrintFatalError(InstRWDef->getLoc(), "No matching instruction opcodes");
 
   for (RecIter I = InstDefs->begin(), E = InstDefs->end(); I != E; ++I) {
     unsigned SCIdx = 0;
@@ -766,7 +766,7 @@ void CodeGenSchedModels::createInstRWClass(Record *InstRWDef) {
         for (RecIter RI = SchedClasses[OldSCIdx].InstRWs.begin(),
                RE = SchedClasses[OldSCIdx].InstRWs.end(); RI != RE; ++RI) {
           if ((*RI)->getValueAsDef("SchedModel") == RWModelDef) {
-            throw TGError(InstRWDef->getLoc(), "Overlapping InstRW def " +
+            PrintFatalError(InstRWDef->getLoc(), "Overlapping InstRW def " +
                           (*II)->getName() + " also matches " +
                           (*RI)->getValue("Instrs")->getValue()->getAsString());
           }
@@ -825,11 +825,11 @@ void CodeGenSchedModels::collectProcItinRW() {
   std::sort(ItinRWDefs.begin(), ItinRWDefs.end(), LessRecord());
   for (RecIter II = ItinRWDefs.begin(), IE = ItinRWDefs.end(); II != IE; ++II) {
     if (!(*II)->getValueInit("SchedModel")->isComplete())
-      throw TGError((*II)->getLoc(), "SchedModel is undefined");
+      PrintFatalError((*II)->getLoc(), "SchedModel is undefined");
     Record *ModelDef = (*II)->getValueAsDef("SchedModel");
     ProcModelMapTy::const_iterator I = ProcModelMap.find(ModelDef);
     if (I == ProcModelMap.end()) {
-      throw TGError((*II)->getLoc(), "Undefined SchedMachineModel "
+      PrintFatalError((*II)->getLoc(), "Undefined SchedMachineModel "
                     + ModelDef->getName());
     }
     ProcModels[I->second].ItinRWDefs.push_back(*II);
@@ -867,7 +867,7 @@ void CodeGenSchedModels::inferFromItinClass(Record *ItinClassDef,
       if (!std::count(Matched.begin(), Matched.end(), ItinClassDef))
         continue;
       if (HasMatch)
-        throw TGError((*II)->getLoc(), "Duplicate itinerary class "
+        PrintFatalError((*II)->getLoc(), "Duplicate itinerary class "
                       + ItinClassDef->getName()
                       + " in ItinResources for " + PM.ModelName);
       HasMatch = true;
@@ -1095,9 +1095,10 @@ void PredTransitions::getIntersectingVariants(
       if (Cnt > 1) {
         const CodeGenProcModel &PM =
           *(SchedModels.procModelBegin() + Variant.ProcIdx);
-        throw TGError(Variant.VarOrSeqDef->getLoc(),
-                      "Multiple variants defined for processor " + PM.ModelName +
-                      " Ensure only one SchedAlias exists per RW.");
+        PrintFatalError(Variant.VarOrSeqDef->getLoc(),
+                        "Multiple variants defined for processor " +
+                        PM.ModelName +
+                        " Ensure only one SchedAlias exists per RW.");
       }
     }
     if (Variant.VarOrSeqDef->isSubClassOf("SchedVar")) {
@@ -1215,8 +1216,9 @@ void PredTransitions::substituteVariantOperand(
       std::vector<TransVariant> IntersectingVariants;
       getIntersectingVariants(SchedRW, TransIdx, IntersectingVariants);
       if (IntersectingVariants.empty())
-        throw TGError(SchedRW.TheDef->getLoc(), "No variant of this type has a "
-                      "matching predicate on any processor ");
+        PrintFatalError(SchedRW.TheDef->getLoc(),
+                      "No variant of this type has "
+                      "a matching predicate on any processor");
       // Now expand each variant on top of its copy of the transition.
       for (std::vector<TransVariant>::const_iterator
              IVI = IntersectingVariants.begin(),
@@ -1440,9 +1442,9 @@ void CodeGenSchedModels::collectItinProcResources(Record *ItinClassDef) {
       if (!std::count(Matched.begin(), Matched.end(), ItinClassDef))
         continue;
       if (HasMatch)
-        throw TGError((*II)->getLoc(), "Duplicate itinerary class "
-                      + ItinClassDef->getName()
-                      + " in ItinResources for " + PM.ModelName);
+        PrintFatalError((*II)->getLoc(), "Duplicate itinerary class "
+                        + ItinClassDef->getName()
+                        + " in ItinResources for " + PM.ModelName);
       HasMatch = true;
       IdxVec Writes, Reads;
       findRWs((*II)->getValueAsListOfDefs("OperandReadWrites"), Writes, Reads);
@@ -1519,17 +1521,17 @@ Record *CodeGenSchedModels::findProcResUnits(Record *ProcResKind,
     if ((*RI)->getValueAsDef("Kind") == ProcResKind
         && (*RI)->getValueAsDef("SchedModel") == PM.ModelDef) {
       if (ProcUnitDef) {
-        throw TGError((*RI)->getLoc(),
-                      "Multiple ProcessorResourceUnits associated with "
-                      + ProcResKind->getName());
+        PrintFatalError((*RI)->getLoc(),
+                        "Multiple ProcessorResourceUnits associated with "
+                        + ProcResKind->getName());
       }
       ProcUnitDef = *RI;
     }
   }
   if (!ProcUnitDef) {
-    throw TGError(ProcResKind->getLoc(),
-                  "No ProcessorResources associated with "
-                  + ProcResKind->getName());
+    PrintFatalError(ProcResKind->getLoc(),
+                    "No ProcessorResources associated with "
+                    + ProcResKind->getName());
   }
   return ProcUnitDef;
 }
@@ -1586,8 +1588,8 @@ unsigned CodeGenProcModel::getProcResourceIdx(Record *PRDef) const {
   RecIter PRPos = std::find(ProcResourceDefs.begin(), ProcResourceDefs.end(),
                             PRDef);
   if (PRPos == ProcResourceDefs.end())
-    throw TGError(PRDef->getLoc(), "ProcResource def is not included in "
-                  "the ProcResources list for " + ModelName);
+    PrintFatalError(PRDef->getLoc(), "ProcResource def is not included in "
+                    "the ProcResources list for " + ModelName);
   // Idx=0 is reserved for invalid.
   return 1 + PRPos - ProcResourceDefs.begin();
 }