[Mips Disassembler] Have the DecodeCCRRegisterClass function use the getReg

function to lookup the proper tablegen'ed register enumeration.  Previously,
it was using the encoded value directly.

llvm-svn: 185026

1 files changed, 4 insertions, 1 deletions

diff --git a/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp b/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
index 4af67037e97..b6b265cd1ed 100644
--- a/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
+++ b/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
@@ -405,7 +405,10 @@ static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst,
                                            unsigned RegNo,
                                            uint64_t Address,
                                            const void *Decoder) {
-  Inst.addOperand(MCOperand::CreateReg(RegNo));
+  if (RegNo > 31)
+    return MCDisassembler::Fail;
+  unsigned Reg = getReg(Decoder, Mips::CCRRegClassID, RegNo);
+  Inst.addOperand(MCOperand::CreateReg(Reg));
   return MCDisassembler::Success;
 }