From bddb7f82103deb226baa6793f41c5961661167e7 Mon Sep 17 00:00:00 2001
From: Andrew Trick <atrick@apple.com>
Date: Wed, 10 Aug 2011 04:22:26 +0000
Subject: [PATCH] Cleanup. Make ScalarEvolution an explicit argument of the
 SimplifyIndVar utility since it is required.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137202 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Transforms/Utils/SimplifyIndVar.h |  6 +++---
 lib/Transforms/Scalar/IndVarSimplify.cpp       |  4 ++--
 lib/Transforms/Utils/SimplifyIndVar.cpp        | 18 +++++++++---------
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/include/llvm/Transforms/Utils/SimplifyIndVar.h b/include/llvm/Transforms/Utils/SimplifyIndVar.h
index 46e4aaffc78..524cf5ad979 100644
--- a/include/llvm/Transforms/Utils/SimplifyIndVar.h
+++ b/include/llvm/Transforms/Utils/SimplifyIndVar.h
@@ -39,18 +39,18 @@ public:
 
 /// simplifyUsersOfIV - Simplify instructions that use this induction variable
 /// by using ScalarEvolution to analyze the IV's recurrence.
-bool simplifyUsersOfIV(PHINode *CurrIV, LPPassManager *LPM,
+bool simplifyUsersOfIV(PHINode *CurrIV, ScalarEvolution *SE, LPPassManager *LPM,
                        SmallVectorImpl<WeakVH> &Dead, IVVisitor *V = NULL);
 
 /// SimplifyLoopIVs - Simplify users of induction variables within this
 /// loop. This does not actually change or add IVs.
-bool simplifyLoopIVs(Loop *L, LPPassManager *LPM,
+bool simplifyLoopIVs(Loop *L, ScalarEvolution *SE, LPPassManager *LPM,
                      SmallVectorImpl<WeakVH> &Dead);
 
 /// simplifyIVUsers - Simplify instructions recorded by the IVUsers pass.
 /// This is a legacy implementation to reproduce the behavior of the
 /// IndVarSimplify pass prior to DisableIVRewrite.
-bool simplifyIVUsers(IVUsers *IU, LPPassManager *LPM,
+bool simplifyIVUsers(IVUsers *IU, ScalarEvolution *SE, LPPassManager *LPM,
                      SmallVectorImpl<WeakVH> &Dead);
 
 } // namespace llvm
diff --git a/lib/Transforms/Scalar/IndVarSimplify.cpp b/lib/Transforms/Scalar/IndVarSimplify.cpp
index 14f995bec26..4cbc9d9c459 100644
--- a/lib/Transforms/Scalar/IndVarSimplify.cpp
+++ b/lib/Transforms/Scalar/IndVarSimplify.cpp
@@ -1192,7 +1192,7 @@ void IndVarSimplify::SimplifyAndExtend(Loop *L,
       // Information about sign/zero extensions of CurrIV.
       WideIVVisitor WIV(SE, TD);
 
-      Changed |= simplifyUsersOfIV(CurrIV, &LPM, DeadInsts, &WIV);
+      Changed |= simplifyUsersOfIV(CurrIV, SE, &LPM, DeadInsts, &WIV);
 
       if (WIV.WI.WidestNativeType) {
         WideIVMap[CurrIV] = WIV.WI;
@@ -1831,7 +1831,7 @@ bool IndVarSimplify::runOnLoop(Loop *L, LPPassManager &LPM) {
 
   // Eliminate redundant IV users.
   if (!DisableIVRewrite)
-    Changed |= simplifyIVUsers(IU, &LPM, DeadInsts);
+    Changed |= simplifyIVUsers(IU, SE, &LPM, DeadInsts);
 
   // Eliminate redundant IV cycles.
   if (DisableIVRewrite)
diff --git a/lib/Transforms/Utils/SimplifyIndVar.cpp b/lib/Transforms/Utils/SimplifyIndVar.cpp
index be6a1e0019d..0cf372a53f3 100644
--- a/lib/Transforms/Utils/SimplifyIndVar.cpp
+++ b/lib/Transforms/Utils/SimplifyIndVar.cpp
@@ -54,16 +54,16 @@ namespace {
     bool Changed;
 
   public:
-    SimplifyIndvar(Loop *Loop, LPPassManager *LPM,
+    SimplifyIndvar(Loop *Loop, ScalarEvolution *SE, LPPassManager *LPM,
                    SmallVectorImpl<WeakVH> &Dead, IVUsers *IVU = NULL) :
       L(Loop),
       LI(LPM->getAnalysisIfAvailable<LoopInfo>()),
-      SE(LPM->getAnalysisIfAvailable<ScalarEvolution>()),
+      SE(SE),
       IU(IVU),
       TD(LPM->getAnalysisIfAvailable<TargetData>()),
       DeadInsts(Dead),
       Changed(false) {
-      assert(LI && SE && "IV simplification requires ScalarEvolution");
+      assert(LI && "IV simplification requires LoopInfo");
     }
 
     bool hasChanged() const { return Changed; }
@@ -372,22 +372,22 @@ namespace llvm {
 
 /// simplifyUsersOfIV - Simplify instructions that use this induction variable
 /// by using ScalarEvolution to analyze the IV's recurrence.
-bool simplifyUsersOfIV(PHINode *CurrIV, LPPassManager *LPM,
+bool simplifyUsersOfIV(PHINode *CurrIV, ScalarEvolution *SE, LPPassManager *LPM,
                        SmallVectorImpl<WeakVH> &Dead, IVVisitor *V)
 {
   LoopInfo *LI = &LPM->getAnalysis<LoopInfo>();
-  SimplifyIndvar SIV(LI->getLoopFor(CurrIV->getParent()), LPM, Dead);
+  SimplifyIndvar SIV(LI->getLoopFor(CurrIV->getParent()), SE, LPM, Dead);
   SIV.simplifyUsers(CurrIV, V);
   return SIV.hasChanged();
 }
 
 /// simplifyLoopIVs - Simplify users of induction variables within this
 /// loop. This does not actually change or add IVs.
-bool simplifyLoopIVs(Loop *L, LPPassManager *LPM,
+bool simplifyLoopIVs(Loop *L, ScalarEvolution *SE, LPPassManager *LPM,
                      SmallVectorImpl<WeakVH> &Dead) {
   bool Changed = false;
   for (BasicBlock::iterator I = L->getHeader()->begin(); isa<PHINode>(I); ++I) {
-    Changed |= simplifyUsersOfIV(cast<PHINode>(I), LPM, Dead);
+    Changed |= simplifyUsersOfIV(cast<PHINode>(I), SE, LPM, Dead);
   }
   return Changed;
 }
@@ -397,9 +397,9 @@ bool simplifyLoopIVs(Loop *L, LPPassManager *LPM,
 ///
 /// This is the old approach to IV simplification to be replaced by
 /// SimplifyLoopIVs.
-bool simplifyIVUsers(IVUsers *IU, LPPassManager *LPM,
+bool simplifyIVUsers(IVUsers *IU, ScalarEvolution *SE, LPPassManager *LPM,
                      SmallVectorImpl<WeakVH> &Dead) {
-  SimplifyIndvar SIV(IU->getLoop(), LPM, Dead);
+  SimplifyIndvar SIV(IU->getLoop(), SE, LPM, Dead);
 
   // Each round of simplification involves a round of eliminating operations
   // followed by a round of widening IVs. A single IVUsers worklist is used
-- 
2.34.1