handle addmode4 modifiers, fix a fixme in printRegisterList
by ignoring all implicit regs when lowering.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84566 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmPrinter/ARMMCInstLower.cpp b/lib/Target/ARM/AsmPrinter/ARMMCInstLower.cpp
index 45e61de..cda5555 100644
--- a/lib/Target/ARM/AsmPrinter/ARMMCInstLower.cpp
+++ b/lib/Target/ARM/AsmPrinter/ARMMCInstLower.cpp
@@ -118,6 +118,8 @@
       MI->dump();
       assert(0 && "unknown operand type");
     case MachineOperand::MO_Register:
+      // Ignore all implicit register operands.
+      if (MO.isImplicit()) continue;
       MCOp = MCOperand::CreateReg(MO.getReg());
       break;
     case MachineOperand::MO_Immediate: