ARM more NEON VLD/VST composite physical register refactoring.

Register pair, all lanes subscripting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152157 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp b/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
index 8754053..2b994df 100644
--- a/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
+++ b/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
@@ -1104,11 +1104,10 @@
 void ARMInstPrinter::printVectorListTwoSpacedAllLanes(const MCInst *MI,
                                                       unsigned OpNum,
                                                       raw_ostream &O) {
-  // Normally, it's not safe to use register enum values directly with
-  // addition to get the next register, but for VFP registers, the
-  // sort order is guaranteed because they're all of the form D<n>.
-  O << "{" << getRegisterName(MI->getOperand(OpNum).getReg()) << "[], "
-    << getRegisterName(MI->getOperand(OpNum).getReg() + 2) << "[]}";
+  unsigned Reg = MI->getOperand(OpNum).getReg();
+  unsigned Reg0 = MRI.getSubReg(Reg, ARM::dsub_0);
+  unsigned Reg1 = MRI.getSubReg(Reg, ARM::dsub_2);
+  O << "{" << getRegisterName(Reg0) << "[], " << getRegisterName(Reg1) << "[]}";
 }
 
 void ARMInstPrinter::printVectorListThreeSpacedAllLanes(const MCInst *MI,