Constify subtarget info properly so that we dont cast away the const in
the SubtargetInfoKV tables. Found by gcc48 -Wcast-qual.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163251 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCSubtargetInfo.cpp b/lib/MC/MCSubtargetInfo.cpp
index 05c83f7..cbf853c 100644
--- a/lib/MC/MCSubtargetInfo.cpp
+++ b/lib/MC/MCSubtargetInfo.cpp
@@ -70,7 +70,7 @@
 }
 
 
-MCSchedModel *
+const MCSchedModel *
 MCSubtargetInfo::getSchedModelForCPU(StringRef CPU) const {
   assert(ProcSchedModel && "Processor machine model not available!");
 
@@ -93,11 +93,11 @@
     return &MCSchedModel::DefaultSchedModel;
   }
   assert(Found->Value && "Missing processor SchedModel value");
-  return (MCSchedModel *)Found->Value;
+  return (const MCSchedModel *)Found->Value;
 }
 
 InstrItineraryData
 MCSubtargetInfo::getInstrItineraryForCPU(StringRef CPU) const {
-  MCSchedModel *SchedModel = getSchedModelForCPU(CPU);
+  const MCSchedModel *SchedModel = getSchedModelForCPU(CPU);
   return InstrItineraryData(SchedModel, Stages, OperandCycles, ForwardingPaths);
 }