================
@@ -3908,6 +3908,12 @@ def X86ForceAlignArgPointer : InheritableAttr, 
TargetSpecificAttr<TargetAnyX86>
   let Documentation = [X86ForceAlignArgPointerDocs];
 }
 
+def SectionMemtag : InheritableAttr {
+  let Spellings = [ClangGCC<"section_memtag">];
----------------
fmayer wrote:

We could reuse `force_memtag` to e.g. force the stack instrumentation to not 
use stack safety analysis for a particular local variable and always tag it 
with MTE.

https://github.com/llvm/llvm-project/pull/168535
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