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Remove code for updating dominance frontiers and some outdated references to

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dominance and post-dominance frontiers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123725 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Cameron Zwarich
2011-01-18 04:11:31 +00:00
parent b1686c32fc
commit 301278719b
7 changed files with 21 additions and 105 deletions
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37
lib/Transforms/Utils/CloneLoop.cpp
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@ -14,17 +14,16 @@
#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);
@ -46,28 +45,9 @@ static void CloneDominatorInfo(BasicBlock *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
@ -76,11 +56,8 @@ Loop *llvm::CloneLoop(Loop *OrigL, LPPassManager *LPM, LoopInfo *LI,
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;
@ -116,7 +93,7 @@ Loop *llvm::CloneLoop(Loop *OrigL, LPPassManager *LPM, LoopInfo *LI,
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