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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83006 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index 12c4b9c..363674b 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -3061,6 +3061,7 @@
     case TargetInstrInfo::EH_LABEL:
       break;
     case TargetInstrInfo::IMPLICIT_DEF:
+    case TargetInstrInfo::KILL:
     case X86::DWARF_LOC:
     case X86::FP_REG_KILL:
       break;