Thumb2 pre-indexed loads/stores use the restricted GPR set for Rt.

llvm-svn: 139965
diff --git a/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp b/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
index 71cda57..d1eb5b3 100644
--- a/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
+++ b/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
@@ -2789,7 +2789,7 @@
       return MCDisassembler::Fail;
   }
 
-  if (!Check(S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
+  if (!Check(S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
     return MCDisassembler::Fail;
 
   if (load) {