Auto merge of #51007 - AstralSorcerer:master, r=nagisa

Make globals with private linkage unnamed. Fixes #50862.

cc @oli-obk @nagisa

src/rustllvm/RustWrapper.cpp

@@ -12,6 +12,7 @@
 #include "llvm/IR/DebugInfoMetadata.h"
 #include "llvm/IR/DiagnosticInfo.h"
 #include "llvm/IR/DiagnosticPrinter.h"
+#include "llvm/IR/GlobalVariable.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/Object/Archive.h"
 #include "llvm/Object/ObjectFile.h"
@@ -116,6 +117,15 @@ LLVMRustGetOrInsertGlobal(LLVMModuleRef M, const char *Name, LLVMTypeRef Ty) {
   return wrap(unwrap(M)->getOrInsertGlobal(Name, unwrap(Ty)));
 }
 
+extern "C" LLVMValueRef
+LLVMRustInsertPrivateGlobal(LLVMModuleRef M, LLVMTypeRef Ty) {
+  return wrap(new GlobalVariable(*unwrap(M),
+                                 unwrap(Ty),
+                                 false,
+                                 GlobalValue::PrivateLinkage,
+                                 nullptr));
+}
+
 extern "C" LLVMTypeRef LLVMRustMetadataTypeInContext(LLVMContextRef C) {
   return wrap(Type::getMetadataTy(*unwrap(C)));
 }