[clang] [llvm] [WebAssembly] Add support for nonnull_extern_ref type (PR #148935)

[Paulo Matos via llvm-commits]

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@@ -308,6 +308,13 @@ Type *Type::getWasm_ExternrefTy(LLVMContext &C) {
   return Ty;
 }
 
+Type *Type::getWasm_NonNullExternrefTy(LLVMContext &C) {
+  // opaque pointer in addrspace(10)
+  // TODO: Hey Jasmine, Is this correct?
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pmatos wrote:

Because you cannot assign non-null to null externrefs interchangeably, it's almost like a different type. My initial thought would be to create a new AS for this.

https://github.com/llvm/llvm-project/pull/148935