From e95ca5bb05ec123af1949469767de30036a11ecb Mon Sep 17 00:00:00 2001
From: Nikita Popov <npopov@redhat.com>
Date: Mon, 14 Nov 2022 15:08:44 +0100
Subject: [AST] Make AliasSetTracker work on BatchAA

D138014 restricted AST to work on immutable IR. This means it is
also safe to use a single BatchAA instance for the entire AST
lifetime, instead of only batching parts of individual queries.

The primary motivation for this is not compile-time, but rather
having a central place to control cross-iteration AA, which will
be used by D137958.

Differential Revision: https://reviews.llvm.org/D137955
---
 polly/include/polly/ScopDetection.h | 9 ++++-----
 polly/lib/Analysis/ScopBuilder.cpp  | 3 ++-
 2 files changed, 6 insertions(+), 6 deletions(-)

(limited to 'polly')

diff --git a/polly/include/polly/ScopDetection.h b/polly/include/polly/ScopDetection.h
index 8fe60d6..5759f75 100644
--- a/polly/include/polly/ScopDetection.h
+++ b/polly/include/polly/ScopDetection.h
@@ -48,22 +48,20 @@
 
 #include "polly/ScopDetectionDiagnostic.h"
 #include "polly/Support/ScopHelper.h"
+#include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/AliasSetTracker.h"
 #include "llvm/Analysis/RegionInfo.h"
 #include "llvm/Analysis/ScalarEvolutionExpressions.h"
 #include "llvm/Pass.h"
 #include <set>
 
-namespace llvm {
-class AAResults;
-} // namespace llvm
-
 namespace polly {
 using llvm::AAResults;
 using llvm::AliasSetTracker;
 using llvm::AnalysisInfoMixin;
 using llvm::AnalysisKey;
 using llvm::AnalysisUsage;
+using llvm::BatchAAResults;
 using llvm::BranchInst;
 using llvm::CallInst;
 using llvm::DenseMap;
@@ -142,6 +140,7 @@ public:
   /// Context variables for SCoP detection.
   struct DetectionContext {
     Region &CurRegion;   // The region to check.
+    BatchAAResults BAA;  // The batched alias analysis results.
     AliasSetTracker AST; // The AliasSetTracker to hold the alias information.
     bool Verifying;      // If we are in the verification phase?
 
@@ -189,7 +188,7 @@ public:
 
     /// Initialize a DetectionContext from scratch.
     DetectionContext(Region &R, AAResults &AA, bool Verify)
-        : CurRegion(R), AST(AA), Verifying(Verify), Log(&R) {}
+        : CurRegion(R), BAA(AA), AST(BAA), Verifying(Verify), Log(&R) {}
   };
 
   /// Helper data structure to collect statistics about loop counts.
diff --git a/polly/lib/Analysis/ScopBuilder.cpp b/polly/lib/Analysis/ScopBuilder.cpp
index 986e06b..ad77c4a 100644
--- a/polly/lib/Analysis/ScopBuilder.cpp
+++ b/polly/lib/Analysis/ScopBuilder.cpp
@@ -3205,7 +3205,8 @@ bool ScopBuilder::buildAliasChecks() {
 
 std::tuple<ScopBuilder::AliasGroupVectorTy, DenseSet<const ScopArrayInfo *>>
 ScopBuilder::buildAliasGroupsForAccesses() {
-  AliasSetTracker AST(AA);
+  BatchAAResults BAA(AA);
+  AliasSetTracker AST(BAA);
 
   DenseMap<Value *, MemoryAccess *> PtrToAcc;
   DenseSet<const ScopArrayInfo *> HasWriteAccess;
-- 
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