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).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193865 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 2 insertions, 12 deletions

diff --git a/include/llvm-c/Core.h b/include/llvm-c/Core.h
index 004492b6ce..690ffa9fdc 100644
--- a/include/llvm-c/Core.h
+++ b/include/llvm-c/Core.h
@@ -274,7 +274,7 @@ typedef enum {
   LLVMLinkOnceAnyLinkage, /**< Keep one copy of function when linking (inline)*/
   LLVMLinkOnceODRLinkage, /**< Same, but only replaced by something
                             equivalent. */
-  LLVMLinkOnceODRAutoHideLinkage, /**< Like LinkOnceODR, but possibly hidden. */
+  LLVMLinkOnceODRAutoHideLinkage, /**< Obsolete */
   LLVMWeakAnyLinkage,     /**< Keep one copy of function when linking (weak) */
   LLVMWeakODRLinkage,     /**< Same, but only replaced by something
                             equivalent. */
diff --git a/include/llvm/IR/GlobalValue.h b/include/llvm/IR/GlobalValue.h
index 1dc99cfaa4..4f20a31a29 100644
--- a/include/llvm/IR/GlobalValue.h
+++ b/include/llvm/IR/GlobalValue.h
@@ -35,7 +35,6 @@ public:
     AvailableExternallyLinkage, ///< Available for inspection, not emission.
     LinkOnceAnyLinkage, ///< Keep one copy of function when linking (inline)
     LinkOnceODRLinkage, ///< Same, but only replaced by something equivalent.
-    LinkOnceODRAutoHideLinkage, ///< Like LinkOnceODRLinkage but addr not taken.
     WeakAnyLinkage,     ///< Keep one copy of named function when linking (weak)
     WeakODRLinkage,     ///< Same, but only replaced by something equivalent.
     AppendingLinkage,   ///< Special purpose, only applies to global arrays
@@ -123,12 +122,7 @@ public:
     return Linkage == AvailableExternallyLinkage;
   }
   static bool isLinkOnceLinkage(LinkageTypes Linkage) {
-    return Linkage == LinkOnceAnyLinkage ||
-           Linkage == LinkOnceODRLinkage ||
-           Linkage == LinkOnceODRAutoHideLinkage;
-  }
-  static bool isLinkOnceODRAutoHideLinkage(LinkageTypes Linkage) {
-    return Linkage == LinkOnceODRAutoHideLinkage;
+    return Linkage == LinkOnceAnyLinkage || Linkage == LinkOnceODRLinkage;
   }
   static bool isWeakLinkage(LinkageTypes Linkage) {
     return Linkage == WeakAnyLinkage || Linkage == WeakODRLinkage;
@@ -192,7 +186,6 @@ public:
            Linkage == WeakODRLinkage ||
            Linkage == LinkOnceAnyLinkage ||
            Linkage == LinkOnceODRLinkage ||
-           Linkage == LinkOnceODRAutoHideLinkage ||
            Linkage == CommonLinkage ||
            Linkage == ExternalWeakLinkage ||
            Linkage == LinkerPrivateWeakLinkage;
@@ -205,9 +198,6 @@ public:
   bool hasLinkOnceLinkage() const {
     return isLinkOnceLinkage(Linkage);
   }
-  bool hasLinkOnceODRAutoHideLinkage() const {
-    return isLinkOnceODRAutoHideLinkage(Linkage);
-  }
   bool hasWeakLinkage() const {
     return isWeakLinkage(Linkage);
   }