Set protocol linkage and visibility correctly and

build protocol translation table meta-data (objc2
non-fragile abi).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63329 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CGObjCMac.cpp b/lib/CodeGen/CGObjCMac.cpp
index 67db5fa7e6ca460e671fd125627d34d4d4db4f28..09987a291e8bc2a732650de4210bbe0e492b18d5 100644 (file)
--- a/lib/CodeGen/CGObjCMac.cpp
+++ b/lib/CodeGen/CGObjCMac.cpp
@@ -3843,12 +3843,12 @@ llvm::Constant *CGObjCNonFragileABIMac::GetOrEmitProtocol(
   
   if (Entry) {
     // Already created, fix the linkage and update the initializer.
-    Entry->setLinkage(llvm::GlobalValue::InternalLinkage);
+    Entry->setLinkage(llvm::GlobalValue::WeakLinkage);
     Entry->setInitializer(Init);
   } else {
     Entry = 
     new llvm::GlobalVariable(ObjCTypes.ProtocolnfABITy, false,
-                             llvm::GlobalValue::InternalLinkage,
+                             llvm::GlobalValue::WeakLinkage,
                              Init, 
                              std::string("\01l_OBJC_PROTOCOL_$_")+ProtocolName,
                              &CGM.getModule());
@@ -3856,6 +3856,21 @@ llvm::Constant *CGObjCNonFragileABIMac::GetOrEmitProtocol(
     // FIXME: Is this necessary? Why only for protocol?
     Entry->setAlignment(4);
   }
+  Entry->setVisibility(llvm::GlobalValue::HiddenVisibility);
+  
+  // Use this protocol meta-data to build protocol list table in section
+  // __DATA, __objc_protolist
+  llvm::Type *ptype = llvm::PointerType::getUnqual(ObjCTypes.ProtocolnfABITy);
+  llvm::GlobalVariable *PTGV = new llvm::GlobalVariable(
+                                      ptype, false,
+                                      llvm::GlobalValue::WeakLinkage,
+                                      Entry, 
+                                      std::string("\01l_OBJC_LABEL_PROTOCOL_$_")
+                                                  +ProtocolName,
+                                      &CGM.getModule());
+  PTGV->setSection("__DATA, __objc_protolist");
+  PTGV->setVisibility(llvm::GlobalValue::HiddenVisibility);
+  UsedGlobals.push_back(PTGV);
   return Entry;
 }