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Remove code for updating dominance frontiers and some outdated references to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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17
lib/Transforms/Utils/BasicBlockUtils.cpp
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@@ -19,7 +19,7 @@
#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"
@@ -311,9 +311,6 @@ BasicBlock *llvm::SplitBlock(BasicBlock *Old, Instruction *SplitPt, Pass *P) {
DT->changeImmediateDominator(*I, NewNode);
}
if (DominanceFrontier *DF = P->getAnalysisIfAvailable<DominanceFrontier>())
DF->splitBlock(Old);
return New;
}
@@ -325,10 +322,9 @@ BasicBlock *llvm::SplitBlock(BasicBlock *Old, Instruction *SplitPt, Pass *P) {
/// 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,
@@ -378,13 +374,10 @@ BasicBlock *llvm::SplitBlockPredecessors(BasicBlock *BB,
}
}
// 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