upd

Created using spr 1.3.4

Author: fmayer

llvm/include/llvm/IR/GlobalValue.h

@@ -303,7 +303,9 @@ class GlobalValue : public Constant {
   void setDSOLocal(bool Local) { IsDSOLocal = Local; }
 
   bool isDSOLocal() const {
-    return IsDSOLocal;
+    // Tagged globals cannot be DSO local, because the linker will put the
+    // tagged pointers into the GOT.
+    return IsDSOLocal && !isTagged();
   }
 
   bool hasPartition() const {

llvm/lib/IR/Globals.cpp

@@ -110,10 +110,6 @@ bool GlobalValue::isInterposable() const {
 }
 
 bool GlobalValue::canBenefitFromLocalAlias() const {
-  if (isTagged()) {
-    // Cannot create local aliases to MTE tagged globals.
-    return false;
-  }
   // See AsmPrinter::getSymbolPreferLocal(). For a deduplicate comdat kind,
   // references to a discarded local symbol from outside the group are not
   // allowed, so avoid the local alias.