Tighten operand checking on CPS instructions.

llvm-svn: 137172
diff --git a/llvm/lib/Target/ARM/ARMInstrInfo.td b/llvm/lib/Target/ARM/ARMInstrInfo.td
index dc19f46..34b3e62 100644
--- a/llvm/lib/Target/ARM/ARMInstrInfo.td
+++ b/llvm/lib/Target/ARM/ARMInstrInfo.td
@@ -1390,6 +1390,7 @@
   let Inst{4-0}   = mode;
 }
 
+let DecoderMethod = "DecodeCPSInstruction" in {
 let M = 1 in
   def CPS3p : CPS<(ins imod_op:$imod, iflags_op:$iflags, imm0_31:$mode),
                   "$imod\t$iflags, $mode">;
@@ -1398,6 +1399,7 @@
 
 let imod = 0, iflags = 0, M = 1 in
   def CPS1p : CPS<(ins imm0_31:$mode), "\t$mode">;
+}
 
 // Preload signals the memory system of possible future data/instruction access.
 // These are for disassembly only.