compiling error

[freexxxyyy]

when it is compiled under llvm14, there is a error. How should fix it?

/home/xli399/libs/program-dependence-graph/src/DataDependencyGraph.cpp: In member function ‘void pdg::DataDependencyGraph::addAliasEdges(llvm::Instruction&)’:
/home/xli399/libs/program-dependence-graph/src/DataDependencyGraph.cpp:44:25: error: ‘NoAlias’ was not declared in this scope
   44 |     if (alias_result != NoAlias)
      |                         ^~~~~~~
/home/xli399/libs/program-dependence-graph/src/DataDependencyGraph.cpp: In member function ‘llvm::AliasResult pdg::DataDependencyGraph::queryAliasUnderApproximate(llvm::Value&, llvm::Value&)’:
/home/xli399/libs/program-dependence-graph/src/DataDependencyGraph.cpp:97:12: error: ‘NoAlias’ was not declared in this scope
   97 |     return NoAlias;
      |            ^~~~~~~
/home/xli399/libs/program-dependence-graph/src/DataDependencyGraph.cpp:102:14: error: ‘MustAlias’ was not declared in this scope
  102 |       return MustAlias;
      |              ^~~~~~~~~
/home/xli399/libs/program-dependence-graph/src/DataDependencyGraph.cpp:115:20: error: ‘MustAlias’ was not declared in this scope
  115 |             return MustAlias;
      |                    ^~~~~~~~~
At global scope: