Constify TargetInstrInfo::EmitInstrWithCustomInserter, allowing
ScheduleDAG's TLI member to use const.

llvm-svn: 64018
diff --git a/llvm/lib/Target/Alpha/AlphaISelLowering.h b/llvm/lib/Target/Alpha/AlphaISelLowering.h
index f165a7f..fdd817c 100644
--- a/llvm/lib/Target/Alpha/AlphaISelLowering.h
+++ b/llvm/lib/Target/Alpha/AlphaISelLowering.h
@@ -99,7 +99,7 @@
     bool hasITOF() { return useITOF; }
 
     MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
-                                                   MachineBasicBlock *BB);
+                                                   MachineBasicBlock *BB) const;
 
     virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;