================
@@ -383,6 +383,30 @@ static llvm::AtomicOrdering mapCABIAtomicOrdering(unsigned 
AO) {
   llvm_unreachable("Unknown AtomicOrderingCABI enum");
 }
 
+// Map a __MEMORY_SCOPE_* integer constant to the AMDGPU-specific syncscope.
+// Invalid scope values are mapped to system scope (empty string).
----------------
shiltian wrote:

I understand this is the current behavior, though I wonder whether we should 
error out instead,

https://github.com/llvm/llvm-project/pull/198250
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