[llvm] LoopSimplify: strip unused pass dependencies (NFC) (PR #107379)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon updated https://github.com/llvm/llvm-project/pull/107379

>From fc7c86051c7e537f94a033225c084d529b49b831 Mon Sep 17 00:00:00 2001
From: Ramkumar Ramachandra <ramkumar.ramachandra at codasip.com>
Date: Thu, 5 Sep 2024 12:10:50 +0100
Subject: [PATCH 1/2] LoopSimplify: strip unused pass dependencies (NFC)

---
 llvm/lib/Transforms/Utils/LoopSimplify.cpp | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/llvm/lib/Transforms/Utils/LoopSimplify.cpp b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
index 5e69923fd989dd..65d09810656c3f 100644
--- a/llvm/lib/Transforms/Utils/LoopSimplify.cpp
+++ b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
@@ -43,18 +43,14 @@
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Statistic.h"
-#include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/AssumptionCache.h"
 #include "llvm/Analysis/BasicAliasAnalysis.h"
 #include "llvm/Analysis/BranchProbabilityInfo.h"
-#include "llvm/Analysis/DependenceAnalysis.h"
-#include "llvm/Analysis/GlobalsModRef.h"
 #include "llvm/Analysis/InstructionSimplify.h"
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Analysis/MemorySSA.h"
 #include "llvm/Analysis/MemorySSAUpdater.h"
 #include "llvm/Analysis/ScalarEvolution.h"
-#include "llvm/Analysis/ScalarEvolutionAliasAnalysis.h"
 #include "llvm/IR/CFG.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/Dominators.h"
@@ -758,11 +754,8 @@ namespace {
 
       AU.addPreserved<BasicAAWrapperPass>();
       AU.addPreserved<AAResultsWrapperPass>();
-      AU.addPreserved<GlobalsAAWrapperPass>();
       AU.addPreserved<ScalarEvolutionWrapperPass>();
-      AU.addPreserved<SCEVAAWrapperPass>();
       AU.addPreservedID(LCSSAID);
-      AU.addPreserved<DependenceAnalysisWrapperPass>();
       AU.addPreservedID(BreakCriticalEdgesID);  // No critical edges added.
       AU.addPreserved<BranchProbabilityInfoWrapperPass>();
       AU.addPreserved<MemorySSAWrapperPass>();
@@ -849,7 +842,6 @@ PreservedAnalyses LoopSimplifyPass::run(Function &F,
   PA.preserve<DominatorTreeAnalysis>();
   PA.preserve<LoopAnalysis>();
   PA.preserve<ScalarEvolutionAnalysis>();
-  PA.preserve<DependenceAnalysis>();
   if (MSSAAnalysis)
     PA.preserve<MemorySSAAnalysis>();
   // BPI maps conditional terminators to probabilities, LoopSimplify can insert

>From 63dc78e4ffe7c3413d783fee056a6cca5d0d51e7 Mon Sep 17 00:00:00 2001
From: Ramkumar Ramachandra <ramkumar.ramachandra at codasip.com>
Date: Mon, 16 Sep 2024 09:59:25 +0100
Subject: [PATCH 2/2] LoopSimplify: revert most of commit; keep DA-strip

---
 llvm/lib/Transforms/Utils/LoopSimplify.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/llvm/lib/Transforms/Utils/LoopSimplify.cpp b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
index 65d09810656c3f..44fdfe530178a9 100644
--- a/llvm/lib/Transforms/Utils/LoopSimplify.cpp
+++ b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
@@ -43,14 +43,17 @@
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Statistic.h"
+#include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/AssumptionCache.h"
 #include "llvm/Analysis/BasicAliasAnalysis.h"
 #include "llvm/Analysis/BranchProbabilityInfo.h"
+#include "llvm/Analysis/GlobalsModRef.h"
 #include "llvm/Analysis/InstructionSimplify.h"
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Analysis/MemorySSA.h"
 #include "llvm/Analysis/MemorySSAUpdater.h"
 #include "llvm/Analysis/ScalarEvolution.h"
+#include "llvm/Analysis/ScalarEvolutionAliasAnalysis.h"
 #include "llvm/IR/CFG.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/Dominators.h"
@@ -754,7 +757,9 @@ namespace {
 
       AU.addPreserved<BasicAAWrapperPass>();
       AU.addPreserved<AAResultsWrapperPass>();
+      AU.addPreserved<GlobalsAAWrapperPass>();
       AU.addPreserved<ScalarEvolutionWrapperPass>();
+      AU.addPreserved<SCEVAAWrapperPass>();
       AU.addPreservedID(LCSSAID);
       AU.addPreservedID(BreakCriticalEdgesID);  // No critical edges added.
       AU.addPreserved<BranchProbabilityInfoWrapperPass>();