Remove redundant writeback flag in ARM addressing mode 5.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98648 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMCodeEmitter.cpp b/lib/Target/ARM/ARMCodeEmitter.cpp
index 89f56e5..01bea0f 100644
--- a/lib/Target/ARM/ARMCodeEmitter.cpp
+++ b/lib/Target/ARM/ARMCodeEmitter.cpp
@@ -1353,7 +1353,7 @@
   Binary |= getAddrModeUPBits(ARM_AM::getAM5SubMode(MO.getImm()));
 
   // Set bit W(21)
-  if (ARM_AM::getAM5WBFlag(MO.getImm()))
+  if (IsUpdating)
     Binary |= 0x1 << ARMII::W_BitShift;
 
   // First register is encoded in Dd.