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Include forms of SplitCriticalEdge which work correctly with pred/succ iterators

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9856 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-11-10 04:42:13 +00:00
parent 33e0a7575d
commit aeef8c70f0
1 changed files with 19 additions and 0 deletions
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19
include/llvm/Transforms/Utils/BasicBlockUtils.h
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@ -18,6 +18,7 @@
// FIXME: Move to this file: BasicBlock::removePredecessor, BB::splitBasicBlock
#include "llvm/BasicBlock.h"
#include "llvm/Support/CFG.h"
class Instruction;
class Pass;
@ -64,4 +65,22 @@ bool isCriticalEdge(const TerminatorInst *TI, unsigned SuccNum);
///
bool SplitCriticalEdge(TerminatorInst *TI, unsigned SuccNum, Pass *P = 0);
inline bool SplitCriticalEdge(BasicBlock *BB, succ_iterator SI, Pass *P = 0) {
return SplitCriticalEdge(BB->getTerminator(), SI.getSuccessorIndex(), P);
}
/// SplitCriticalEdge - If the edge from *PI to BB is not critical, return
/// false. Otherwise, split all edges between the two blocks and return true.
/// This updates all of the same analyses as the other SplitCriticalEdge
/// function.
inline bool SplitCriticalEdge(BasicBlock *Succ, pred_iterator PI, Pass *P = 0) {
BasicBlock *Pred = *PI;
bool MadeChange = false;
for (succ_iterator SI = succ_begin(Pred), E = succ_end(Pred); SI != E; ++SI)
if (*SI == Succ)
MadeChange |= SplitCriticalEdge(Pred, SI, P);
return MadeChange;
}
#endif