Remove linkonce_odr_auto_hide.

linkonce_odr_auto_hide was in incomplete attempt to implement a way
for the linker to hide symbols that are known to be available in every
TU and whose addresses are not relevant for a particular DSO.

It was redundant in that it all its uses are equivalent to
linkonce_odr+unnamed_addr. Unlike those, it has never been connected
to clang or llvm's optimizers, so it was effectively dead.

Given that nothing produces it, this patch just nukes it
(other than the llvm-c enum value).

llvm-svn: 193865

1 files changed, 2 insertions, 3 deletions

diff --git a/llvm/lib/IR/Core.cpp b/llvm/lib/IR/Core.cpp
index 56d28e42db7..40db69b3700 100644
--- a/llvm/lib/IR/Core.cpp
+++ b/llvm/lib/IR/Core.cpp
@@ -1134,8 +1134,6 @@ LLVMLinkage LLVMGetLinkage(LLVMValueRef Global) {
     return LLVMLinkOnceAnyLinkage;
   case GlobalValue::LinkOnceODRLinkage:
     return LLVMLinkOnceODRLinkage;
-  case GlobalValue::LinkOnceODRAutoHideLinkage:
-    return LLVMLinkOnceODRAutoHideLinkage;
   case GlobalValue::WeakAnyLinkage:
     return LLVMWeakAnyLinkage;
   case GlobalValue::WeakODRLinkage:
@@ -1180,7 +1178,8 @@ void LLVMSetLinkage(LLVMValueRef Global, LLVMLinkage Linkage) {
     GV->setLinkage(GlobalValue::LinkOnceODRLinkage);
     break;
   case LLVMLinkOnceODRAutoHideLinkage:
-    GV->setLinkage(GlobalValue::LinkOnceODRAutoHideLinkage);
+    DEBUG(errs() << "LLVMSetLinkage(): LLVMLinkOnceODRAutoHideLinkage is no "
+                    "longer supported.");
     break;
   case LLVMWeakAnyLinkage:
     GV->setLinkage(GlobalValue::WeakAnyLinkage);