本文整理汇总了C++中TerminatorInst::getPrevNode方法的典型用法代码示例。如果您正苦于以下问题：C++ TerminatorInst::getPrevNode方法的具体用法？C++ TerminatorInst::getPrevNode怎么用？C++ TerminatorInst::getPrevNode使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类TerminatorInst的用法示例。
在下文中一共展示了TerminatorInst::getPrevNode方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: getGlobalContext
bool
LoopBarriers::ProcessLoop(Loop *L, LPPassManager &LPM)
{
bool isBLoop = false;
bool changed = false;
for (Loop::block_iterator i = L->block_begin(), e = L->block_end();
i != e && !isBLoop; ++i) {
for (BasicBlock::iterator j = (*i)->begin(), e = (*i)->end();
j != e; ++j) {
if (isa<BarrierInst>(j)) {
isBLoop = true;
break;
}
}
}
LLVMContext &LC = getGlobalContext();
IntegerType * IntTy = IntegerType::get(LC, 32);
Value *Args = ConstantInt::get(IntTy, 0);
for (Loop::block_iterator i = L->block_begin(), e = L->block_end();
i != e && isBLoop; ++i) {
for (BasicBlock::iterator j = (*i)->begin(), e = (*i)->end();
j != e; ++j) {
if (isa<BarrierInst>(j)) {
BasicBlock *preheader = L->getLoopPreheader();
assert((preheader != NULL) && "Non-canonicalized loop found!\n");
Instruction *PhdrBarrierInst =
BarrierInst::createBarrier(Args, preheader->getTerminator());
MDNode* PhdrAuxBarrierInfo =
MDNode::get(LC, MDString::get(LC, "auxiliary phdr barrier"));
PhdrBarrierInst->setMetadata("aux.phdr.barrier", PhdrAuxBarrierInfo);
preheader->setName(preheader->getName() + ".loopbarrier");
BasicBlock *header = L->getHeader();
if (header->getFirstNonPHI() != &header->front()) {
Instruction *HdrBarrierInst =
BarrierInst::createBarrier(Args, header->getFirstNonPHI());
MDNode* HdrAuxBarrierInfo =
MDNode::get(LC, MDString::get(LC, "auxiliary phihdr barrier"));
HdrBarrierInst->setMetadata("aux.phihdr.barrier", HdrAuxBarrierInfo);
header->setName(header->getName() + ".phibarrier");
}
/*
SmallVector<BasicBlock*, 8> ExitingBlocks;
L->getExitingBlocks(ExitingBlocks);
*/
BasicBlock *brexit = L->getExitingBlock();
if (brexit != NULL) {
Instruction *ExitingBarrierInst =
BarrierInst::createBarrier(Args, brexit->getTerminator());
MDNode* ExitingAuxBarrierInfo =
MDNode::get(LC, MDString::get(LC, "auxiliary exiting barrier"));
ExitingBarrierInst->setMetadata("aux.exiting.barrier",
ExitingAuxBarrierInfo);
brexit->setName(brexit->getName() + ".brexitbarrier");
}
BasicBlock *latch = L->getLoopLatch();
if (latch != NULL && brexit != latch) {
Instruction *LatchBarrierInst =
BarrierInst::createBarrier(Args, latch->getTerminator());
MDNode* LatchAuxBarrierInfo =
MDNode::get(LC, MDString::get(LC, "auxiliary latch barrier"));
LatchBarrierInst->setMetadata("aux.latch.barrier",
LatchAuxBarrierInfo);
latch->setName(latch->getName() + ".latchbarrier");
return changed;
}
BasicBlock *Header = L->getHeader();
typedef GraphTraits<Inverse<BasicBlock *> > InvBlockTraits;
InvBlockTraits::ChildIteratorType PI = InvBlockTraits::child_begin(Header);
InvBlockTraits::ChildIteratorType PE = InvBlockTraits::child_end(Header);
BasicBlock *Latch = NULL;
for (; PI != PE; ++PI) {
InvBlockTraits::NodeType *N = *PI;
if (L->contains(N)) {
Latch = N;
if (DT->dominates(j->getParent(), Latch)) {
BarrierInst::createBarrier(Args, Latch->getTerminator());
Latch->setName(Latch->getName() + ".latchbarrier");
}
}
}
return true;
}
}
}
BasicBlock *preheader = L->getLoopPreheader();
assert((preheader != NULL) && "Non-canonicalized loop found!\n");
TerminatorInst *t = preheader->getTerminator();
Instruction *prev = NULL;
if (&preheader->front() != t) {
// If t is not the first/only instruction in the block, get the previous
// instruction.
prev = t->getPrevNode();
//.........这里部分代码省略.........