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/SystemZ/AsmPrinter/SystemZAsmPrinter.cpp b/lib/Target/SystemZ/AsmPrinter/SystemZAsmPrinter.cpp
index 1bb4d42..7dd6fcc 100644
--- a/lib/Target/SystemZ/AsmPrinter/SystemZAsmPrinter.cpp
+++ b/lib/Target/SystemZ/AsmPrinter/SystemZAsmPrinter.cpp
@@ -118,6 +118,7 @@
   default: assert(0 && "Unknown linkage type!");
   case Function::InternalLinkage:  // Symbols default to internal.
   case Function::PrivateLinkage:
+  case Function::LinkerPrivateLinkage:
     break;
   case Function::ExternalLinkage:
     O << "\t.globl\t" << CurrentFnName << '\n';
@@ -396,6 +397,7 @@
     O << "\t.globl " << name << '\n';
     // FALL THROUGH
   case GlobalValue::PrivateLinkage:
+  case GlobalValue::LinkerPrivateLinkage:
   case GlobalValue::InternalLinkage:
      break;
   default: