Minor simplification. Gets rid of a needless temporary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111430 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 7e166d5..7609494 100644
--- a/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -1403,14 +1403,13 @@
   case ARM::ADDri:
   case ARM::SUBri:
   case ARM::t2ADDri:
-  case ARM::t2SUBri: {
+  case ARM::t2SUBri:
     MI->RemoveOperand(5);
-    MachineInstrBuilder MB(MI);
-    MB.addReg(ARM::CPSR, RegState::Define | RegState::Implicit);
+    MachineInstrBuilder(MI)
+      .addReg(ARM::CPSR, RegState::Define | RegState::Implicit);
     CmpInstr->eraseFromParent();
     return true;
   }
-  }
 
   return false;
 }