From: Chandler Carruth <chandlerc@gmail.com>
Date: Mon, 19 Jan 2015 03:03:39 +0000 (+0000)
Subject: [PM] Lift the analyses into the interface for
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0eae112009967cfb4ffa441e62c89fb8c38331bd;p=platform%2Fupstream%2Fllvm.git

[PM] Lift the analyses into the interface for
SplitLandingPadPredecessors and remove the Pass argument from its
interface.

Another step to the utilities being usable with both old and new pass
managers.

llvm-svn: 226426
---

diff --git a/llvm/include/llvm/Transforms/Utils/BasicBlockUtils.h b/llvm/include/llvm/Transforms/Utils/BasicBlockUtils.h
index a9b6b39..da1988c 100644
--- a/llvm/include/llvm/Transforms/Utils/BasicBlockUtils.h
+++ b/llvm/include/llvm/Transforms/Utils/BasicBlockUtils.h
@@ -188,9 +188,14 @@ BasicBlock *SplitBlockPredecessors(BasicBlock *BB, ArrayRef<BasicBlock *> Preds,
 /// case where one of the edges being split is an exit of a loop with other
 /// exits).
 ///
-void SplitLandingPadPredecessors(BasicBlock *OrigBB,ArrayRef<BasicBlock*> Preds,
+void SplitLandingPadPredecessors(BasicBlock *OrigBB,
+                                 ArrayRef<BasicBlock *> Preds,
                                  const char *Suffix, const char *Suffix2,
-                                 Pass *P, SmallVectorImpl<BasicBlock*> &NewBBs);
+                                 SmallVectorImpl<BasicBlock *> &NewBBs,
+                                 AliasAnalysis *AA = nullptr,
+                                 DominatorTree *DT = nullptr,
+                                 LoopInfo *LI = nullptr,
+                                 bool PreserveLCSSA = false);
 
 /// FoldReturnIntoUncondBranch - This method duplicates the specified return
 /// instruction into a predecessor which ends in an unconditional branch. If
diff --git a/llvm/lib/Transforms/IPO/LoopExtractor.cpp b/llvm/lib/Transforms/IPO/LoopExtractor.cpp
index 20414aa..41334ca 100644
--- a/llvm/lib/Transforms/IPO/LoopExtractor.cpp
+++ b/llvm/lib/Transforms/IPO/LoopExtractor.cpp
@@ -242,7 +242,7 @@ void BlockExtractorPass::SplitLandingPadPreds(Function *F) {
     if (!Split) continue;
 
     SmallVector<BasicBlock*, 2> NewBBs;
-    SplitLandingPadPredecessors(LPad, Parent, ".1", ".2", nullptr, NewBBs);
+    SplitLandingPadPredecessors(LPad, Parent, ".1", ".2", NewBBs);
   }
 }
 
diff --git a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 250185c..629b0a2 100644
--- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -4733,7 +4733,8 @@ void LSRInstance::RewriteForPHI(PHINode *PN,
                                       /*DontDeleteUselessPhis=*/true);
           } else {
             SmallVector<BasicBlock*, 2> NewBBs;
-            SplitLandingPadPredecessors(Parent, BB, "", "", P, NewBBs);
+            SplitLandingPadPredecessors(Parent, BB, "", "", NewBBs,
+                                        /*AliasAnalysis*/ nullptr, &DT, &LI);
             NewBB = NewBBs[0];
           }
           // If NewBB==NULL, then SplitCriticalEdge refused to split because all
diff --git a/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp b/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp
index cf80244..30d6d51 100644
--- a/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopUnswitch.cpp
@@ -775,7 +775,8 @@ void LoopUnswitch::SplitExitEdges(Loop *L,
     } else {
       SmallVector<BasicBlock*, 2> NewBBs;
       SplitLandingPadPredecessors(ExitBlock, Preds, ".us-lcssa", ".us-lcssa",
-                                  this, NewBBs);
+                                  NewBBs, /*AliasAnalysis*/ nullptr, DT, LI,
+                                  /*PreserveLCSSA*/ true);
     }
   }
 }
diff --git a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
index c680788..c2304d7 100644
--- a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -523,10 +523,11 @@ BasicBlock *llvm::SplitBlockPredecessors(BasicBlock *BB,
 /// exits).
 ///
 void llvm::SplitLandingPadPredecessors(BasicBlock *OrigBB,
-                                       ArrayRef<BasicBlock*> Preds,
+                                       ArrayRef<BasicBlock *> Preds,
                                        const char *Suffix1, const char *Suffix2,
-                                       Pass *P,
-                                       SmallVectorImpl<BasicBlock*> &NewBBs) {
+                                       SmallVectorImpl<BasicBlock *> &NewBBs,
+                                       AliasAnalysis *AA, DominatorTree *DT,
+                                       LoopInfo *LI, bool PreserveLCSSA) {
   assert(OrigBB->isLandingPad() && "Trying to split a non-landing pad!");
 
   // Create a new basic block for OrigBB's predecessors listed in Preds. Insert
@@ -549,18 +550,11 @@ void llvm::SplitLandingPadPredecessors(BasicBlock *OrigBB,
     Preds[i]->getTerminator()->replaceUsesOfWith(OrigBB, NewBB1);
   }
 
-  // Update DominatorTree, LoopInfo, and LCCSA analysis information.
-  auto *DTWP = P->getAnalysisIfAvailable<DominatorTreeWrapperPass>();
-  auto *DT = DTWP ? &DTWP->getDomTree() : nullptr;
-  auto *LIWP = P->getAnalysisIfAvailable<LoopInfoWrapperPass>();
-  auto *LI = LIWP ? &LIWP->getLoopInfo() : nullptr;
-  bool PreserveLCSSA = P->mustPreserveAnalysisID(LCSSAID);
   bool HasLoopExit = false;
   UpdateAnalysisInformation(OrigBB, NewBB1, Preds, DT, LI, PreserveLCSSA,
                             HasLoopExit);
 
   // Update the PHI nodes in OrigBB with the values coming from NewBB1.
-  AliasAnalysis *AA = P ? P->getAnalysisIfAvailable<AliasAnalysis>() : nullptr;
   UpdatePHINodes(OrigBB, NewBB1, Preds, BI1, AA, HasLoopExit);
 
   // Move the remaining edges from OrigBB to point to NewBB2.
diff --git a/llvm/lib/Transforms/Utils/LoopSimplify.cpp b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
index 926c3a7..725188d 100644
--- a/llvm/lib/Transforms/Utils/LoopSimplify.cpp
+++ b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
@@ -145,7 +145,7 @@ BasicBlock *llvm::InsertPreheaderForLoop(Loop *L, Pass *PP) {
   } else {
     SmallVector<BasicBlock*, 2> NewBBs;
     SplitLandingPadPredecessors(Header, OutsideBlocks, ".preheader",
-                                ".split-lp", PP, NewBBs);
+                                ".split-lp", NewBBs, AA, DT, LI, PreserveLCSSA);
     PreheaderBB = NewBBs[0];
   }
 
@@ -186,9 +186,8 @@ static BasicBlock *rewriteLoopExitBlock(Loop *L, BasicBlock *Exit,
 
   if (Exit->isLandingPad()) {
     SmallVector<BasicBlock*, 2> NewBBs;
-    SplitLandingPadPredecessors(Exit, LoopBlocks,
-                                ".loopexit", ".nonloopexit",
-                                PP, NewBBs);
+    SplitLandingPadPredecessors(Exit, LoopBlocks, ".loopexit", ".nonloopexit",
+                                NewBBs, AA, DT, LI, PreserveLCSSA);
     NewExitBB = NewBBs[0];
   } else {
     NewExitBB = SplitBlockPredecessors(Exit, LoopBlocks, ".loopexit", AA, DT,
diff --git a/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp b/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
index 82b4f09..2a8c20d 100644
--- a/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
@@ -125,7 +125,8 @@ static void ConnectProlog(Loop *L, Value *TripCount, unsigned Count,
   } else {
     SmallVector<BasicBlock*, 2> NewBBs;
     SplitLandingPadPredecessors(Exit, Preds, ".unr1-lcssa", ".unr2-lcssa",
-                                P, NewBBs);
+                                NewBBs, AA, DT, LI,
+                                P->mustPreserveAnalysisID(LCSSAID));
   }
   // Add the branch to the exit block (around the unrolled loop)
   BranchInst::Create(Exit, NewPH, BrLoopExit, InsertPt);