[TableGen] Improve error reporting

When searching for a resource unit, use the reference location instead of
the definition location in case of an error.

Differential revision: https://reviews.llvm.org/D40263

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@318803 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 19 insertions, 14 deletions

diff --git a/utils/TableGen/CodeGenSchedule.cpp b/utils/TableGen/CodeGenSchedule.cpp
index 3a30b28d669..b753e19a544 100644
--- a/utils/TableGen/CodeGenSchedule.cpp
+++ b/utils/TableGen/CodeGenSchedule.cpp
@@ -1672,7 +1672,8 @@ void CodeGenSchedModels::collectRWResources(ArrayRef<unsigned> Writes,
 
 // Find the processor's resource units for this kind of resource.
 Record *CodeGenSchedModels::findProcResUnits(Record *ProcResKind,
-                                             const CodeGenProcModel &PM) const {
+                                             const CodeGenProcModel &PM,
+                                             ArrayRef<SMLoc> Loc) const {
   if (ProcResKind->isSubClassOf("ProcResourceUnits"))
     return ProcResKind;
 
@@ -1684,7 +1685,7 @@ Record *CodeGenSchedModels::findProcResUnits(Record *ProcResKind,
     if (ProcResDef->getValueAsDef("Kind") == ProcResKind
         && ProcResDef->getValueAsDef("SchedModel") == PM.ModelDef) {
       if (ProcUnitDef) {
-        PrintFatalError(ProcResDef->getLoc(),
+        PrintFatalError(Loc,
                         "Multiple ProcessorResourceUnits associated with "
                         + ProcResKind->getName());
       }
@@ -1695,7 +1696,7 @@ Record *CodeGenSchedModels::findProcResUnits(Record *ProcResKind,
     if (ProcResGroup == ProcResKind
         && ProcResGroup->getValueAsDef("SchedModel") == PM.ModelDef) {
       if (ProcUnitDef) {
-        PrintFatalError((ProcResGroup)->getLoc(),
+        PrintFatalError(Loc,
                         "Multiple ProcessorResourceUnits associated with "
                         + ProcResKind->getName());
       }
@@ -1703,7 +1704,7 @@ Record *CodeGenSchedModels::findProcResUnits(Record *ProcResKind,
     }
   }
   if (!ProcUnitDef) {
-    PrintFatalError(ProcResKind->getLoc(),
+    PrintFatalError(Loc,
                     "No ProcessorResources associated with "
                     + ProcResKind->getName());
   }
@@ -1712,9 +1713,10 @@ Record *CodeGenSchedModels::findProcResUnits(Record *ProcResKind,
 
 // Iteratively add a resource and its super resources.
 void CodeGenSchedModels::addProcResource(Record *ProcResKind,
-                                         CodeGenProcModel &PM) {
+                                         CodeGenProcModel &PM,
+                                         ArrayRef<SMLoc> Loc) {
   while (true) {
-    Record *ProcResUnits = findProcResUnits(ProcResKind, PM);
+    Record *ProcResUnits = findProcResUnits(ProcResKind, PM, Loc);
 
     // See if this ProcResource is already associated with this processor.
     if (is_contained(PM.ProcResourceDefs, ProcResUnits))
@@ -1744,7 +1746,7 @@ void CodeGenSchedModels::addWriteRes(Record *ProcWriteResDef, unsigned PIdx) {
   RecVec ProcResDefs = ProcWriteResDef->getValueAsListOfDefs("ProcResources");
   for (RecIter WritePRI = ProcResDefs.begin(), WritePRE = ProcResDefs.end();
        WritePRI != WritePRE; ++WritePRI) {
-    addProcResource(*WritePRI, ProcModels[PIdx]);
+    addProcResource(*WritePRI, ProcModels[PIdx], ProcWriteResDef->getLoc());
   }
 }
 
diff --git a/utils/TableGen/CodeGenSchedule.h b/utils/TableGen/CodeGenSchedule.h
index 3a30ba9ba2a..46e22cd1281 100644
--- a/utils/TableGen/CodeGenSchedule.h
+++ b/utils/TableGen/CodeGenSchedule.h
@@ -382,8 +382,8 @@ public:
   unsigned findSchedClassIdx(Record *ItinClassDef, ArrayRef<unsigned> Writes,
                              ArrayRef<unsigned> Reads) const;
 
-  Record *findProcResUnits(Record *ProcResKind,
-                           const CodeGenProcModel &PM) const;
+  Record *findProcResUnits(Record *ProcResKind, const CodeGenProcModel &PM,
+                           ArrayRef<SMLoc> Loc) const;
 
 private:
   void collectProcModels();
@@ -432,7 +432,8 @@ private:
   void collectRWResources(ArrayRef<unsigned> Writes, ArrayRef<unsigned> Reads,
                           ArrayRef<unsigned> ProcIndices);
 
-  void addProcResource(Record *ProcResourceKind, CodeGenProcModel &PM);
+  void addProcResource(Record *ProcResourceKind, CodeGenProcModel &PM,
+                       ArrayRef<SMLoc> Loc);
 
   void addWriteRes(Record *ProcWriteResDef, unsigned PIdx);
 
diff --git a/utils/TableGen/SubtargetEmitter.cpp b/utils/TableGen/SubtargetEmitter.cpp
index e5e64ab9eb6..2c5658f8ce7 100644
--- a/utils/TableGen/SubtargetEmitter.cpp
+++ b/utils/TableGen/SubtargetEmitter.cpp
@@ -601,8 +601,9 @@ void SubtargetEmitter::EmitProcessorResources(const CodeGenProcModel &ProcModel,
     else {
       // Find the SuperIdx
       if (PRDef->getValueInit("Super")->isComplete()) {
-        SuperDef = SchedModels.findProcResUnits(
-          PRDef->getValueAsDef("Super"), ProcModel);
+        SuperDef =
+            SchedModels.findProcResUnits(PRDef->getValueAsDef("Super"),
+                                         ProcModel, PRDef->getLoc());
         SuperIdx = ProcModel.getProcResourceIdx(SuperDef);
       }
       NumUnits = PRDef->getValueAsInt("NumUnits");
@@ -739,7 +740,7 @@ void SubtargetEmitter::ExpandProcResources(RecVec &PRVec,
       SubResources = PRDef->getValueAsListOfDefs("Resources");
     else {
       SubResources.push_back(PRDef);
-      PRDef = SchedModels.findProcResUnits(PRVec[i], PM);
+      PRDef = SchedModels.findProcResUnits(PRDef, PM, PRDef->getLoc());
       for (Record *SubDef = PRDef;
            SubDef->getValueInit("Super")->isComplete();) {
         if (SubDef->isSubClassOf("ProcResGroup")) {
@@ -748,7 +749,8 @@ void SubtargetEmitter::ExpandProcResources(RecVec &PRVec,
                           " cannot be a super resources.");
         }
         Record *SuperDef =
-          SchedModels.findProcResUnits(SubDef->getValueAsDef("Super"), PM);
+            SchedModels.findProcResUnits(SubDef->getValueAsDef("Super"), PM,
+                                         SubDef->getLoc());
         PRVec.push_back(SuperDef);
         Cycles.push_back(Cycles[i]);
         SubDef = SuperDef;