[llvm] 5cc99d0 - [GlobalsModRef] Add invalidate method

[Alina Sbirlea via llvm-commits]

Author: Alina Sbirlea
Date: 2020-01-17T10:33:54-08:00
New Revision: 5cc99d05f5633e4c8c9e6a6316e3e59595550322

URL: https://github.com/llvm/llvm-project/commit/5cc99d05f5633e4c8c9e6a6316e3e59595550322
DIFF: https://github.com/llvm/llvm-project/commit/5cc99d05f5633e4c8c9e6a6316e3e59595550322.diff

LOG: [GlobalsModRef] Add invalidate method

Summary: Add invalidate method to GlobalsAA.

Reviewers: tejohnson, chandlerc

Subscribers: hiraditya, sanjoy.google, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D72818

Added: 
    

Modified: 
    llvm/include/llvm/Analysis/GlobalsModRef.h
    llvm/lib/Analysis/GlobalsModRef.cpp

Removed: 
    


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diff  --git a/llvm/include/llvm/Analysis/GlobalsModRef.h b/llvm/include/llvm/Analysis/GlobalsModRef.h
index fa5b16cf95eb..54cc0d4af629 100644
--- a/llvm/include/llvm/Analysis/GlobalsModRef.h
+++ b/llvm/include/llvm/Analysis/GlobalsModRef.h
@@ -83,6 +83,9 @@ class GlobalsAAResult : public AAResultBase<GlobalsAAResult> {
   GlobalsAAResult(GlobalsAAResult &&Arg);
   ~GlobalsAAResult();
 
+  bool invalidate(Module &M, const PreservedAnalyses &PA,
+                  ModuleAnalysisManager::Invalidator &);
+
   static GlobalsAAResult
   analyzeModule(Module &M,
                 std::function<const TargetLibraryInfo &(Function &F)> GetTLI,

diff  --git a/llvm/lib/Analysis/GlobalsModRef.cpp b/llvm/lib/Analysis/GlobalsModRef.cpp
index 11005c403c1b..a281626505a3 100644
--- a/llvm/lib/Analysis/GlobalsModRef.cpp
+++ b/llvm/lib/Analysis/GlobalsModRef.cpp
@@ -810,6 +810,14 @@ bool GlobalsAAResult::isNonEscapingGlobalNoAlias(const GlobalValue *GV,
   return true;
 }
 
+bool GlobalsAAResult::invalidate(Module &, const PreservedAnalyses &PA,
+                                 ModuleAnalysisManager::Invalidator &) {
+  // Check whether the analysis has been explicitly invalidated. Otherwise, it's
+  // stateless and remains preserved.
+  auto PAC = PA.getChecker<GlobalsAA>();
+  return !PAC.preservedWhenStateless();
+}
+
 /// alias - If one of the pointers is to a global that we are tracking, and the
 /// other is some random pointer, we know there cannot be an alias, because the
 /// address of the global isn't taken.