Unbreak JIT. Ignore TargetInstrInfo::IMPLICIT_DEF.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48447 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaCodeEmitter.cpp b/lib/Target/Alpha/AlphaCodeEmitter.cpp
index 0ae99a9..51a1404 100644
--- a/lib/Target/Alpha/AlphaCodeEmitter.cpp
+++ b/lib/Target/Alpha/AlphaCodeEmitter.cpp
@@ -95,6 +95,7 @@
     case Alpha::ALTENT:
     case Alpha::PCLABEL:
     case Alpha::MEMLABEL:
+    case TargetInstrInfo::IMPLICIT_DEF:
       break; //skip these
     }
   }