[wasm] Denote debug code in disassembly

We were just printing "Liftoff" in the compiler field, whichout a way to
tell if it's Liftoff's debugging code flavour or default Liftoff code.
This CL encodes that in the "compiler" field by selecting between
"TurboFan", "Liftoff", and "Liftoff (debug)".

R=ahaas@chromium.org

Change-Id: Ia0c004eab96c0e10e52e81c4e2863dab423124fe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2985399Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75377}

src/wasm/wasm-code-manager.cc

@@ -363,7 +363,11 @@ void WasmCode::Disassemble(const char* name, std::ostream& os,
   if (name) os << "name: " << name << "\n";
   if (!IsAnonymous()) os << "index: " << index() << "\n";
   os << "kind: " << GetWasmCodeKindAsString(kind()) << "\n";
-  os << "compiler: " << (is_liftoff() ? "Liftoff" : "TurboFan") << "\n";
+  DCHECK(is_liftoff() || tier() == ExecutionTier::kTurbofan);
+  const char* compiler = is_liftoff()
+                             ? (for_debugging() ? "Liftoff (debug)" : "Liftoff")
+                             : "TurboFan";
+  os << "compiler: " << compiler << "\n";
   size_t padding = instructions().size() - unpadded_binary_size_;
   os << "Body (size = " << instructions().size() << " = "
      << unpadded_binary_size_ << " + " << padding << " padding)\n";