Add plumbing for the `linker_private' linkage type. This type is meant for
"private" symbols which the assember shouldn't strip, but which the linker may
remove after evaluation. This is mostly useful for Objective-C metadata.

This is plumbing, so we don't have a use of it yet. More to come, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76385 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AsmPrinter/AlphaAsmPrinter.cpp b/lib/Target/Alpha/AsmPrinter/AlphaAsmPrinter.cpp
index b772c14..ce07225 100644
--- a/lib/Target/Alpha/AsmPrinter/AlphaAsmPrinter.cpp
+++ b/lib/Target/Alpha/AsmPrinter/AlphaAsmPrinter.cpp
@@ -157,6 +157,7 @@
   default: llvm_unreachable("Unknown linkage type!");
   case Function::InternalLinkage:  // Symbols default to internal.
   case Function::PrivateLinkage:
+  case Function::LinkerPrivateLinkage:
     break;
    case Function::ExternalLinkage:
      O << "\t.globl " << CurrentFnName << "\n";
@@ -245,6 +246,7 @@
       break;
     case GlobalValue::InternalLinkage:
     case GlobalValue::PrivateLinkage:
+    case GlobalValue::LinkerPrivateLinkage:
       break;
     default:
       llvm_unreachable("Unknown linkage type!");