Enhance the InstrStage object to enable the specification of an Itinerary with overlapping stages. The default is to maintain the current behavior that the "next" stage immediately follows the previous one.

llvm-svn: 78827

1 files changed, 7 insertions, 4 deletions

diff --git a/llvm/utils/TableGen/SubtargetEmitter.cpp b/llvm/utils/TableGen/SubtargetEmitter.cpp
index 919ac664efa..4a0bacd19cf 100644
--- a/llvm/utils/TableGen/SubtargetEmitter.cpp
+++ b/llvm/utils/TableGen/SubtargetEmitter.cpp
@@ -215,7 +215,7 @@ void SubtargetEmitter::FormItineraryString(Record *ItinData,
     // Next stage
     const Record *Stage = StageList[i];
   
-    // Form string as ,{ cycles, u1 | u2 | ... | un }
+    // Form string as ,{ cycles, u1 | u2 | ... | un, timeinc }
     int Cycles = Stage->getValueAsInt("Cycles");
     ItinString += "  { " + itostr(Cycles) + ", ";
     
@@ -229,6 +229,9 @@ void SubtargetEmitter::FormItineraryString(Record *ItinData,
       if (++j < M) ItinString += " | ";
     }
     
+    int TimeInc = Stage->getValueAsInt("TimeInc");
+    ItinString += ", " + itostr(TimeInc);
+
     // Close off stage
     ItinString += " }";
     if (++i < N) ItinString += ", ";
@@ -252,7 +255,7 @@ void SubtargetEmitter::EmitStageData(raw_ostream &OS,
 
   // Begin stages table
   OS << "static const llvm::InstrStage Stages[] = {\n"
-        "  { 0, 0 }, // No itinerary\n";
+        "  { 0, 0, 0 }, // No itinerary\n";
         
   unsigned StageCount = 1;
   unsigned ItinEnum = 1;
@@ -289,7 +292,7 @@ void SubtargetEmitter::EmitStageData(raw_ostream &OS,
       
       // If new itinerary
       if (Find == 0) {
-        // Emit as { cycles, u1 | u2 | ... | un }, // index
+        // Emit as { cycles, u1 | u2 | ... | un, timeinc }, // index
         OS << ItinString << ", // " << ItinEnum << "\n";
         // Record Itin class number.
         ItinMap[ItinString] = Find = StageCount;
@@ -313,7 +316,7 @@ void SubtargetEmitter::EmitStageData(raw_ostream &OS,
   }
   
   // Closing stage
-  OS << "  { 0, 0 } // End itinerary\n";
+  OS << "  { 0, 0, 0 } // End itinerary\n";
   // End stages table
   OS << "};\n";