Fix Casting

Fix a casting-away-const compiler warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172471 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsCodeEmitter.cpp b/lib/Target/Mips/MipsCodeEmitter.cpp
index 52fa95b..8efcd3c 100644
--- a/lib/Target/Mips/MipsCodeEmitter.cpp
+++ b/lib/Target/Mips/MipsCodeEmitter.cpp
@@ -120,7 +120,8 @@
 char MipsCodeEmitter::ID = 0;
 
 bool MipsCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
-  JTI = ((MipsTargetMachine&) MF.getTarget()).getJITInfo();
+  JTI = const_cast<MipsTargetMachine&>(
+          static_cast<const MipsTargetMachine&>(MF.getTarget())).getJITInfo();
   II = ((const MipsTargetMachine&) MF.getTarget()).getInstrInfo();
   TD = ((const MipsTargetMachine&) MF.getTarget()).getDataLayout();
   Subtarget = &TM.getSubtarget<MipsSubtarget> ();