message: [MLIR] Add definition of ResourceAliasAnalysisInfo::kUnknownResourceId
  Add definition to fix link failure.
diff: @@ -224,6 +224,8 @@ int64_t GetOrCreateIdForVarHandle(VarHandleOp handle, int64_t* next_id,
  // ResourceAliasAnalysisInfo
  //===----------------------------------------------------------------------===//
  +constexpr int64_t ResourceAliasAnalysisInfo::kUnknownResourceId;
  +
  // Constructs the analysis info by analyzing the given function.
  ResourceAliasAnalysisInfo::ResourceAliasAnalysisInfo(
  FuncOp func_op, const BacktrackAnalysis& backtrack_analysis) {
  