Use enums instead of literals in the ARM backend.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104573 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
index f761963..d95efdb 100644
--- a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
@@ -327,8 +327,8 @@
     } else if (Modifier && strcmp(Modifier, "lane") == 0) {
       unsigned RegNum = ARMRegisterInfo::getRegisterNumbering(Reg);
       unsigned DReg =
-        TM.getRegisterInfo()->getMatchingSuperReg(Reg, RegNum & 1 ? 2 : 1,
-                                                  &ARM::DPR_VFP2RegClass);
+        TM.getRegisterInfo()->getMatchingSuperReg(Reg,
+          RegNum & 1 ? ARM::ssub_1 : ARM::ssub_0, &ARM::DPR_VFP2RegClass);
       O << getRegisterName(DReg) << '[' << (RegNum & 1) << ']';
     } else {
       assert(!MO.getSubReg() && "Subregs should be eliminated!");