[WebAssembly] Suppress unused function warning for register name matcher

llvm-svn: 328112

llvm/lib/Target/WebAssembly/AsmParser/WebAssemblyAsmParser.cpp

@@ -32,6 +32,10 @@ using namespace llvm;
 
 #define DEBUG_TYPE "wasm-asm-parser"
 
+// TODO: TableGen generates this register name matcher, but it is not used
+// anywhere. Mark it with the "unused" attribute to suppress warnings.
+static unsigned LLVM_ATTRIBUTE_UNUSED MatchRegisterName(StringRef Name);
+
 namespace {
 
 // We store register types as SimpleValueType to retain SIMD layout