diff options
Diffstat (limited to 'lib/CodeGen/MachineBasicBlock.cpp')
| -rw-r--r-- | lib/CodeGen/MachineBasicBlock.cpp | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/lib/CodeGen/MachineBasicBlock.cpp b/lib/CodeGen/MachineBasicBlock.cpp index f506f12050..d351db59e6 100644 --- a/lib/CodeGen/MachineBasicBlock.cpp +++ b/lib/CodeGen/MachineBasicBlock.cpp @@ -439,14 +439,6 @@ MachineBasicBlock::SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P) { if (TII->AnalyzeBranch(*this, TBB, FBB, Cond)) return NULL; - // Avoid splitting backedges of loops. It would introduce small out-of-line - // blocks into the loop which is very bad for code placement. - if (this == Succ) - return NULL; - MachineLoopInfo *MLI = P->getAnalysisIfAvailable<MachineLoopInfo>(); - if (MLI->isLoopHeader(Succ)) - return NULL; - MachineBasicBlock *NMBB = MF->CreateMachineBasicBlock(); MF->insert(llvm::next(MachineFunction::iterator(this)), NMBB); DEBUG(dbgs() << "Splitting critical edge:" @@ -479,7 +471,7 @@ MachineBasicBlock::SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P) { P->getAnalysisIfAvailable<MachineDominatorTree>()) MDT->addNewBlock(NMBB, this); - if (MLI) + if (MachineLoopInfo *MLI = P->getAnalysisIfAvailable<MachineLoopInfo>()) if (MachineLoop *TIL = MLI->getLoopFor(this)) { // If one or the other blocks were not in a loop, the new block is not // either, and thus LI doesn't need to be updated. |