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Rangify loops, formatting changes, use bool instead of unsigned, NFC

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llvm-svn: 306557
This commit is contained in:
Krzysztof Parzyszek 2017-06-28 16:02:00 +00:00
parent 2319d98c5f
commit f0d7f8cfbb
1 changed files with 15 additions and 17 deletions
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32
lib/CodeGen/LiveRangeCalc.cpp
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@ -371,10 +371,7 @@ bool LiveRangeCalc::findReachingDefs(LiveRange &LR, MachineBasicBlock &UseMBB,
#endif
FoundUndef |= MBB->pred_empty();
for (MachineBasicBlock::pred_iterator PI = MBB->pred_begin(),
PE = MBB->pred_end(); PI != PE; ++PI) {
MachineBasicBlock *Pred = *PI;
for (MachineBasicBlock *Pred : MBB->predecessors()) {
// Is this a known live-out block?
if (Seen.test(Pred->getNumber())) {
if (VNInfo *VNI = Map[Pred].first) {
@ -457,7 +454,8 @@ bool LiveRangeCalc::findReachingDefs(LiveRange &LR, MachineBasicBlock &UseMBB,
LiveIn.reserve(WorkList.size());
for (unsigned BN : WorkList) {
MachineBasicBlock *MBB = MF->getBlockNumbered(BN);
if (Undefs.size() > 0 && !isDefOnEntry(LR, Undefs, *MBB, DefOnEntry, UndefOnEntry))
if (Undefs.size() > 0 &&
!isDefOnEntry(LR, Undefs, *MBB, DefOnEntry, UndefOnEntry))
continue;
addLiveInBlock(LR, DomTree->getNode(MBB));
if (MBB == &UseMBB)
@ -475,9 +473,9 @@ void LiveRangeCalc::updateSSA() {
assert(DomTree && "Missing dominator tree");
// Interate until convergence.
unsigned Changes;
bool Changed;
do {
Changes = 0;
Changed = false;
// Propagate live-out values down the dominator tree, inserting phi-defs
// when necessary.
for (LiveInBlock &I : LiveIn) {
@ -500,14 +498,14 @@ void LiveRangeCalc::updateSSA() {
IDomValue = Map[IDom->getBlock()];
// Cache the DomTree node that defined the value.
if (IDomValue.first && IDomValue.first != &UndefVNI)
if (!IDomValue.second)
Map[IDom->getBlock()].second = IDomValue.second =
DomTree->getNode(Indexes->getMBBFromIndex(IDomValue.first->def));
if (IDomValue.first && IDomValue.first != &UndefVNI &&
!IDomValue.second) {
Map[IDom->getBlock()].second = IDomValue.second =
DomTree->getNode(Indexes->getMBBFromIndex(IDomValue.first->def));
}
for (MachineBasicBlock::pred_iterator PI = MBB->pred_begin(),
PE = MBB->pred_end(); PI != PE; ++PI) {
LiveOutPair &Value = Map[*PI];
for (MachineBasicBlock *Pred : MBB->predecessors()) {
LiveOutPair &Value = Map[Pred];
if (!Value.first || Value.first == IDomValue.first)
continue;
if (Value.first == &UndefVNI) {
@ -537,7 +535,7 @@ void LiveRangeCalc::updateSSA() {
// Create a phi-def if required.
if (needPHI) {
++Changes;
Changed = true;
assert(Alloc && "Need VNInfo allocator to create PHI-defs");
SlotIndex Start, End;
std::tie(Start, End) = Indexes->getMBBRange(MBB);
@ -568,9 +566,9 @@ void LiveRangeCalc::updateSSA() {
// MBB is live-out and doesn't define its own value.
if (LOP.first == IDomValue.first)
continue;
++Changes;
Changed = true;
LOP = IDomValue;
}
}
} while (Changes);
} while (Changed);
}