Introduce the TargetInstrInfo::KILL machine instruction and get rid of the
unused DECLARE instruction.

KILL is not yet used anywhere, it will replace TargetInstrInfo::IMPLICIT_DEF
in the places where IMPLICIT_DEF is just used to alter liveness of physical
registers.

llvm-svn: 83006
diff --git a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
index a228945..79950fe 100644
--- a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -423,6 +423,7 @@
     default:
       llvm_unreachable("Unknown or unset size field for instr!");
     case TargetInstrInfo::IMPLICIT_DEF:
+    case TargetInstrInfo::KILL:
     case TargetInstrInfo::DBG_LABEL:
     case TargetInstrInfo::EH_LABEL:
       return 0;