diff options
| -rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 35 |
1 files changed, 19 insertions, 16 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index efc050e..432409a 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -611,23 +611,26 @@ void LiveIntervals::handleLiveInRegister(MachineBasicBlock *MBB, MachineBasicBlock::iterator E = MBB->end(); while (mi != E) { - if (!mi->isDebugValue()) { - if (mi->killsRegister(interval.reg, tri_)) { - DEBUG(dbgs() << " killed"); - end = baseIndex.getDefIndex(); - SeenDefUse = true; - break; - } else if (mi->modifiesRegister(interval.reg, tri_)) { - // Another instruction redefines the register before it is ever read. - // Then the register is essentially dead at the instruction that defines - // it. Hence its interval is: - // [defSlot(def), defSlot(def)+1) - DEBUG(dbgs() << " dead"); - end = start.getStoreIndex(); - SeenDefUse = true; - break; - } + if (mi->isDebugValue()) { + ++mi; + continue; + } + if (mi->killsRegister(interval.reg, tri_)) { + DEBUG(dbgs() << " killed"); + end = baseIndex.getDefIndex(); + SeenDefUse = true; + break; + } else if (mi->modifiesRegister(interval.reg, tri_)) { + // Another instruction redefines the register before it is ever read. + // Then the register is essentially dead at the instruction that defines + // it. Hence its interval is: + // [defSlot(def), defSlot(def)+1) + DEBUG(dbgs() << " dead"); + end = start.getStoreIndex(); + SeenDefUse = true; + break; } + ++mi; if (mi != E && !mi->isDebugValue()) { baseIndex = indexes_->getNextNonNullIndex(baseIndex); |