[LazyCallGraph] Add invalidate method.

Summary: Add invalidate method in LazyCallGraph.

Reviewers: chandlerc, silvas

Subscribers: hiraditya, sanjoy.google, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D72817

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/Analysis/LazyCallGraph.cpp b/llvm/lib/Analysis/LazyCallGraph.cpp
index a9dd5e0..ee1e9a3 100644
--- a/llvm/lib/Analysis/LazyCallGraph.cpp
+++ b/llvm/lib/Analysis/LazyCallGraph.cpp
@@ -215,6 +215,15 @@ LazyCallGraph::LazyCallGraph(LazyCallGraph &&G)
   updateGraphPtrs();
 }
 
+bool LazyCallGraph::invalidate(Module &, const PreservedAnalyses &PA,
+                               ModuleAnalysisManager::Invalidator &) {
+  // Check whether the analysis, all analyses on functions, or the function's
+  // CFG have been preserved.
+  auto PAC = PA.getChecker<llvm::LazyCallGraphAnalysis>();
+  return !(PAC.preserved() || PAC.preservedSet<AllAnalysesOn<Module>>() ||
+           PAC.preservedSet<CFGAnalyses>());
+}
+
 LazyCallGraph &LazyCallGraph::operator=(LazyCallGraph &&G) {
   BPA = std::move(G.BPA);
   NodeMap = std::move(G.NodeMap);