bool handleEndBlock(BasicBlock &BB);
void RemoveAccessedObjects(const AliasAnalysis::Location &LoadedLoc,
SmallPtrSet<Value*, 16> &DeadStackObjects);
-
- // getAnalysisUsage - We require post dominance frontiers (aka Control
- // Dependence Graph)
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesCFG();
AU.addRequired<DominatorTree>();
#define DEBUG_TYPE "loop-delete"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Analysis/LoopPass.h"
-#include "llvm/Analysis/DominanceFrontier.h"
+#include "llvm/Analysis/Dominators.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/SmallVector.h"
AU.addPreserved<LoopInfo>();
AU.addPreservedID(LoopSimplifyID);
AU.addPreservedID(LCSSAID);
- AU.addPreserved<DominanceFrontier>();
}
};
}
// Update the dominator tree and remove the instructions and blocks that will
// be deleted from the reference counting scheme.
DominatorTree& DT = getAnalysis<DominatorTree>();
- DominanceFrontier* DF = getAnalysisIfAvailable<DominanceFrontier>();
SmallVector<DomTreeNode*, 8> ChildNodes;
for (Loop::block_iterator LI = L->block_begin(), LE = L->block_end();
LI != LE; ++LI) {
for (SmallVector<DomTreeNode*, 8>::iterator DI = ChildNodes.begin(),
DE = ChildNodes.end(); DI != DE; ++DI) {
DT.changeImmediateDominator(*DI, DT[preheader]);
- if (DF) DF->changeImmediateDominator((*DI)->getBlock(), preheader, &DT);
}
ChildNodes.clear();
DT.eraseNode(*LI);
- if (DF) DF->removeBlock(*LI);
// Remove the block from the reference counting scheme, so that we can
// delete it freely later.
// We split critical edges, so we change the CFG. However, we do update
// many analyses if they are around.
AU.addPreservedID(LoopSimplifyID);
- AU.addPreserved("domfrontier");
AU.addRequired<LoopInfo>();
AU.addPreserved<LoopInfo>();
#include "llvm/Constant.h"
#include "llvm/Type.h"
#include "llvm/Analysis/AliasAnalysis.h"
-#include "llvm/Analysis/DominanceFrontier.h"
+#include "llvm/Analysis/Dominators.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/MemoryDependenceAnalysis.h"
#include "llvm/Target/TargetData.h"
DT->changeImmediateDominator(*I, NewNode);
}
- if (DominanceFrontier *DF = P->getAnalysisIfAvailable<DominanceFrontier>())
- DF->splitBlock(Old);
-
return New;
}
/// suffix of 'Suffix'.
///
/// This currently updates the LLVM IR, AliasAnalysis, DominatorTree,
-/// DominanceFrontier, LoopInfo, and LCCSA but no other analyses.
-/// In particular, it does not preserve LoopSimplify (because it's
-/// complicated to handle the case where one of the edges being split
-/// is an exit of a loop with other exits).
+/// LoopInfo, and LCCSA but no other analyses. In particular, it does not
+/// preserve LoopSimplify (because it's complicated to handle the case where one
+/// of the edges being split is an exit of a loop with other exits).
///
BasicBlock *llvm::SplitBlockPredecessors(BasicBlock *BB,
BasicBlock *const *Preds,
}
}
- // Update dominator tree and dominator frontier if available.
+ // Update dominator tree if available.
DominatorTree *DT = P ? P->getAnalysisIfAvailable<DominatorTree>() : 0;
if (DT)
DT->splitBlock(NewBB);
- if (DominanceFrontier *DF =
- P ? P->getAnalysisIfAvailable<DominanceFrontier>() : 0)
- DF->splitBlock(NewBB);
// Insert a new PHI node into NewBB for every PHI node in BB and that new PHI
// node becomes an incoming value for BB's phi node. However, if the Preds
// inserting a dummy basic block. This pass may be "required" by passes that
// cannot deal with critical edges. For this usage, the structure type is
// forward declared. This pass obviously invalidates the CFG, but can update
-// forward dominator (set, immediate dominators, tree, and frontier)
-// information.
+// dominator trees.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "break-crit-edges"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
-#include "llvm/Analysis/DominanceFrontier.h"
+#include "llvm/Analysis/Dominators.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/ProfileInfo.h"
#include "llvm/Function.h"
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addPreserved<DominatorTree>();
- AU.addPreserved<DominanceFrontier>();
AU.addPreserved<LoopInfo>();
AU.addPreserved<ProfileInfo>();
}
/// SplitCriticalEdge - If this edge is a critical edge, insert a new node to
-/// split the critical edge. This will update DominatorTree and
-/// DominatorFrontier information if it is available, thus calling this pass
-/// will not invalidate either of them. This returns the new block if the edge
-/// was split, null otherwise.
+/// split the critical edge. This will update DominatorTree information if it
+/// is available, thus calling this pass will not invalidate either of them.
+/// This returns the new block if the edge was split, null otherwise.
///
/// If MergeIdenticalEdges is true (not the default), *all* edges from TI to the
/// specified successor will be merged into the same critical edge block.
if (P == 0) return NewBB;
DominatorTree *DT = P->getAnalysisIfAvailable<DominatorTree>();
- DominanceFrontier *DF = P->getAnalysisIfAvailable<DominanceFrontier>();
LoopInfo *LI = P->getAnalysisIfAvailable<LoopInfo>();
ProfileInfo *PI = P->getAnalysisIfAvailable<ProfileInfo>();
// If we have nothing to update, just return.
- if (DT == 0 && DF == 0 && LI == 0 && PI == 0)
+ if (DT == 0 && LI == 0 && PI == 0)
return NewBB;
// Now update analysis information. Since the only predecessor of NewBB is
}
}
- // Should we update DominanceFrontier information?
- if (DF) {
- // If NewBBDominatesDestBB hasn't been computed yet, do so with DF.
- if (!OtherPreds.empty()) {
- // FIXME: IMPLEMENT THIS!
- llvm_unreachable("Requiring domfrontiers but not idom/domtree/domset."
- " not implemented yet!");
- }
-
- // Since the new block is dominated by its only predecessor TIBB,
- // it cannot be in any block's dominance frontier. If NewBB dominates
- // DestBB, its dominance frontier is the same as DestBB's, otherwise it is
- // just {DestBB}.
- DominanceFrontier::DomSetType NewDFSet;
- if (NewBBDominatesDestBB) {
- DominanceFrontier::iterator I = DF->find(DestBB);
- if (I != DF->end()) {
- DF->addBasicBlock(NewBB, I->second);
-
- if (I->second.count(DestBB)) {
- // However NewBB's frontier does not include DestBB.
- DominanceFrontier::iterator NF = DF->find(NewBB);
- DF->removeFromFrontier(NF, DestBB);
- }
- }
- else
- DF->addBasicBlock(NewBB, DominanceFrontier::DomSetType());
- } else {
- DominanceFrontier::DomSetType NewDFSet;
- NewDFSet.insert(DestBB);
- DF->addBasicBlock(NewBB, NewDFSet);
- }
- }
-
// Update LoopInfo if it is around.
if (LI) {
if (Loop *TIL = LI->getLoopFor(TIBB)) {
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/BasicBlock.h"
#include "llvm/Analysis/LoopPass.h"
-#include "llvm/Analysis/DominanceFrontier.h"
+#include "llvm/Analysis/Dominators.h"
using namespace llvm;
-/// CloneDominatorInfo - Clone basicblock's dominator tree and, if available,
-/// dominance info. It is expected that basic block is already cloned.
+/// CloneDominatorInfo - Clone a basic block's dominator tree. It is expected
+/// that the basic block is already cloned.
static void CloneDominatorInfo(BasicBlock *BB,
ValueToValueMapTy &VMap,
- DominatorTree *DT,
- DominanceFrontier *DF) {
+ DominatorTree *DT) {
assert (DT && "DominatorTree is not available");
ValueToValueMapTy::iterator BI = VMap.find(BB);
if (BBDomI != VMap.end()) {
NewBBDom = cast<BasicBlock>(BBDomI->second);
if (!DT->getNode(NewBBDom))
- CloneDominatorInfo(BBDom, VMap, DT, DF);
+ CloneDominatorInfo(BBDom, VMap, DT);
}
DT->addNewBlock(NewBB, NewBBDom);
-
- // Copy cloned dominance frontiner set
- if (DF) {
- DominanceFrontier::DomSetType NewDFSet;
- DominanceFrontier::iterator DFI = DF->find(BB);
- if ( DFI != DF->end()) {
- DominanceFrontier::DomSetType S = DFI->second;
- for (DominanceFrontier::DomSetType::iterator I = S.begin(), E = S.end();
- I != E; ++I) {
- BasicBlock *DB = *I;
- ValueToValueMapTy::iterator IDM = VMap.find(DB);
- if (IDM != VMap.end())
- NewDFSet.insert(cast<BasicBlock>(IDM->second));
- else
- NewDFSet.insert(DB);
- }
- }
- DF->addBasicBlock(NewBB, NewDFSet);
- }
}
/// CloneLoop - Clone Loop. Clone dominator info. Populate VMap
ValueToValueMapTy &VMap, Pass *P) {
DominatorTree *DT = NULL;
- DominanceFrontier *DF = NULL;
- if (P) {
+ if (P)
DT = P->getAnalysisIfAvailable<DominatorTree>();
- DF = P->getAnalysisIfAvailable<DominanceFrontier>();
- }
SmallVector<BasicBlock *, 16> NewBlocks;
for (Loop::block_iterator I = L->block_begin(), E = L->block_end();
I != E; ++I) {
BasicBlock *BB = *I;
- CloneDominatorInfo(BB, VMap, DT, DF);
+ CloneDominatorInfo(BB, VMap, DT);
}
// Process sub loops
#include "llvm/LLVMContext.h"
#include "llvm/Type.h"
#include "llvm/Analysis/AliasAnalysis.h"
-#include "llvm/Analysis/DominanceFrontier.h"
+#include "llvm/Analysis/Dominators.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/ScalarEvolution.h"
AU.addPreserved<AliasAnalysis>();
AU.addPreserved<ScalarEvolution>();
AU.addPreservedID(BreakCriticalEdgesID); // No critical edges added.
- AU.addPreserved<DominanceFrontier>();
}
/// verifyAnalysis() - Verify LoopSimplifyForm's guarantees.
if (!FoldBranchToCommonDest(BI)) continue;
// Success. The block is now dead, so remove it from the loop,
- // update the dominator tree and dominance frontier, and delete it.
+ // update the dominator tree and delete it.
DEBUG(dbgs() << "LoopSimplify: Eliminating exiting block "
<< ExitingBlock->getName() << "\n");
Changed = true;
LI->removeBlock(ExitingBlock);
- DominanceFrontier *DF = getAnalysisIfAvailable<DominanceFrontier>();
DomTreeNode *Node = DT->getNode(ExitingBlock);
const std::vector<DomTreeNodeBase<BasicBlock> *> &Children =
Node->getChildren();
while (!Children.empty()) {
DomTreeNode *Child = Children.front();
DT->changeImmediateDominator(Child, Node->getIDom());
- if (DF) DF->changeImmediateDominator(Child->getBlock(),
- Node->getIDom()->getBlock(),
- DT);
}
DT->eraseNode(ExitingBlock);
- if (DF) DF->removeBlock(ExitingBlock);
BI->getSuccessor(0)->removePredecessor(ExitingBlock);
BI->getSuccessor(1)->removePredecessor(ExitingBlock);
// Update dominator information
DT->splitBlock(BEBlock);
- if (DominanceFrontier *DF = getAnalysisIfAvailable<DominanceFrontier>())
- DF->splitBlock(BEBlock);
return BEBlock;
}
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