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[PM] Sink the specific analyses preserved by SplitBlock into its

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interface, removing Pass from its interface.

This also makes those analyses optional so that passes which don't even
preserve these (or use them) can skip the logic entirely.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226394 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2015-01-18 02:39:37 +00:00
parent 0389537c08
commit 7478e27573
5 changed files with 26 additions and 19 deletions
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3
include/llvm/Transforms/Utils/BasicBlockUtils.h
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@ -153,7 +153,8 @@ BasicBlock *SplitEdge(BasicBlock *From, BasicBlock *To, Pass *P);
/// to a new block. The two blocks are joined by an unconditional branch and
/// the loop info is updated.
///
BasicBlock *SplitBlock(BasicBlock *Old, Instruction *SplitPt, Pass *P);
BasicBlock *SplitBlock(BasicBlock *Old, Instruction *SplitPt,
DominatorTree *DT = nullptr, LoopInfo *LI = nullptr);
/// SplitBlockPredecessors - This method transforms BB by introducing a new
/// basic block into the function, and moving some of the predecessors of BB to