// Compute the set of predecessors of the loop that are not in the loop.
SmallVector<BasicBlock*, 8> OutsideBlocks;
- for (pred_iterator PI = pred_begin(Header), PE = pred_end(Header);
- PI != PE; ++PI) {
- BasicBlock *P = *PI;
+ for (BasicBlock *P : predecessors(Header)) {
if (!L->contains(P)) { // Coming in from outside the loop?
// If the loop is branched to from an indirect branch, we won't
// be able to fully transform the loop, because it prohibits
/// the loop.
static BasicBlock *rewriteLoopExitBlock(Loop *L, BasicBlock *Exit, Pass *PP) {
SmallVector<BasicBlock*, 8> LoopBlocks;
- for (pred_iterator I = pred_begin(Exit), E = pred_end(Exit); I != E; ++I) {
- BasicBlock *P = *I;
+ for (BasicBlock *P : predecessors(Exit)) {
if (L->contains(P)) {
// Don't do this if the loop is exited via an indirect branch.
if (isa<IndirectBrInst>(P->getTerminator())) return nullptr;
if (Blocks.insert(BB).second && BB != StopBlock)
// If BB is not already processed and it is not a stop block then
// insert its predecessor in the work list
- for (pred_iterator I = pred_begin(BB), E = pred_end(BB); I != E; ++I) {
- BasicBlock *WBB = *I;
+ for (BasicBlock *WBB : predecessors(BB))
Worklist.push_back(WBB);
- }
} while (!Worklist.empty());
}
// Determine which blocks should stay in L and which should be moved out to
// the Outer loop now.
std::set<BasicBlock*> BlocksInL;
- for (pred_iterator PI=pred_begin(Header), E = pred_end(Header); PI!=E; ++PI) {
- BasicBlock *P = *PI;
+ for (BasicBlock *P : predecessors(Header)) {
if (DT->dominates(Header, P))
addBlockAndPredsToSet(P, Header, BlocksInL);
}
// Figure out which basic blocks contain back-edges to the loop header.
std::vector<BasicBlock*> BackedgeBlocks;
- for (pred_iterator I = pred_begin(Header), E = pred_end(Header); I != E; ++I){
- BasicBlock *P = *I;
-
+ for (BasicBlock *P : predecessors(Header)) {
// Indirectbr edges cannot be split, so we must fail if we find one.
if (isa<IndirectBrInst>(P->getTerminator()))
return nullptr;
if (*BB == L->getHeader()) continue;
SmallPtrSet<BasicBlock*, 4> BadPreds;
- for (pred_iterator PI = pred_begin(*BB),
- PE = pred_end(*BB); PI != PE; ++PI) {
- BasicBlock *P = *PI;
+ for (BasicBlock *P : predecessors(*BB)) {
if (!L->contains(P))
BadPreds.insert(P);
}
<< (*I)->getName() << "\n");
// Inform each successor of each dead pred.
- for (succ_iterator SI = succ_begin(*I), SE = succ_end(*I); SI != SE; ++SI)
- (*SI)->removePredecessor(*I);
+ for (BasicBlock *Succ : successors(*I))
+ Succ->removePredecessor(*I);
// Zap the dead pred's terminator and replace it with unreachable.
TerminatorInst *TI = (*I)->getTerminator();
TI->replaceAllUsesWith(UndefValue::get(TI->getType()));
for (SmallSetVector<BasicBlock *, 8>::iterator I = ExitBlockSet.begin(),
E = ExitBlockSet.end(); I != E; ++I) {
BasicBlock *ExitBlock = *I;
- for (pred_iterator PI = pred_begin(ExitBlock), PE = pred_end(ExitBlock);
- PI != PE; ++PI)
+ for (BasicBlock *Pred : predecessors(ExitBlock))
// Must be exactly this loop: no subloops, parent loops, or non-loop preds
// allowed.
- if (!L->contains(*PI)) {
+ if (!L->contains(Pred)) {
if (rewriteLoopExitBlock(L, ExitBlock, PP)) {
++NumInserted;
Changed = true;