Improve r172471: avoid all those extra casts on the lines nearby


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172481 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsCodeEmitter.cpp b/lib/Target/Mips/MipsCodeEmitter.cpp
index 8efcd3c..a24de60 100644
--- a/lib/Target/Mips/MipsCodeEmitter.cpp
+++ b/lib/Target/Mips/MipsCodeEmitter.cpp
@@ -120,10 +120,12 @@
 char MipsCodeEmitter::ID = 0;
 
 bool MipsCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
-  JTI = const_cast<MipsTargetMachine&>(
-          static_cast<const MipsTargetMachine&>(MF.getTarget())).getJITInfo();
-  II = ((const MipsTargetMachine&) MF.getTarget()).getInstrInfo();
-  TD = ((const MipsTargetMachine&) MF.getTarget()).getDataLayout();
+  MipsTargetMachine &Target = static_cast<MipsTargetMachine &>(
+                                const_cast<TargetMachine &>(MF.getTarget()));
+
+  JTI = Target.getJITInfo();
+  II = Target.getInstrInfo();
+  TD = Target.getDataLayout();
   Subtarget = &TM.getSubtarget<MipsSubtarget> ();
   MCPEs = &MF.getConstantPool()->getConstants();
   MJTEs = 0;