[llvm] [WebAssembly] Add ref.test_func handling to AsmParser (PR #139642)

[Sam Clegg via llvm-commits]

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@@ -27,6 +27,21 @@ ref_null_test:
   drop
   end_function
 
+# CHECK-LABEL: ref_test_test:
+# CHECK: ref.null_func   # encoding: [0xd0,0x70]
+# CHECK: ref.test () -> () # encoding: [0xfb,0x14,0x80'A',0x80'A',0x80'A',0x80'A',A]
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sbc100 wrote:

Why call it `ref.test_func` in the assembly if what it generates is `ref.test`?

Is `ref.test_func` a real wasm instruction?  If not then we should probably think twice before adding it, or at least document it somewhere I suppose?   What is the rational for not just using `ref.test`?

https://github.com/llvm/llvm-project/pull/139642