MBasicBlock *
MBasicBlock::NewAsmJS(MIRGraph &graph, CompileInfo &info, MBasicBlock *pred, Kind kind)
{
MBasicBlock *block = new MBasicBlock(graph, info, /* entryPC = */ NULL, kind);
if (!block->init())
return NULL;
if (pred) {
block->stackPosition_ = pred->stackPosition_;
if (block->kind_ == PENDING_LOOP_HEADER) {
for (size_t i = 0; i < block->stackPosition_; i++) {
MDefinition *predSlot = pred->getSlot(i);
JS_ASSERT(predSlot->type() != MIRType_Value);
MPhi *phi = MPhi::New(i, predSlot->type());
JS_ALWAYS_TRUE(phi->reserveLength(2));
phi->addInput(predSlot);
block->addPhi(phi);
block->setSlot(i, phi);
}
} else {
block->copySlots(pred);
}
if (!block->predecessors_.append(pred))
return NULL;
}
return block;
}
MBasicBlock*
MBasicBlock::New(MIRGraph& graph, const CompileInfo& info, MBasicBlock* pred, Kind kind)
{
BytecodeSite* site = new(graph.alloc()) BytecodeSite();
MBasicBlock* block = new(graph.alloc()) MBasicBlock(graph, info, site, kind);
if (!block->init())
return nullptr;
if (pred) {
block->stackPosition_ = pred->stackPosition_;
if (block->kind_ == PENDING_LOOP_HEADER) {
size_t nphis = block->stackPosition_;
size_t nfree = graph.phiFreeListLength();
TempAllocator& alloc = graph.alloc();
MPhi* phis = nullptr;
if (nphis > nfree) {
phis = alloc.allocateArray<MPhi>(nphis - nfree);
if (!phis)
return nullptr;
}
// Note: Phis are inserted in the same order as the slots.
for (size_t i = 0; i < nphis; i++) {
MDefinition* predSlot = pred->getSlot(i);
MOZ_ASSERT(predSlot->type() != MIRType::Value);
MPhi* phi;
if (i < nfree)
phi = graph.takePhiFromFreeList();
else
phi = phis + (i - nfree);
new(phi) MPhi(alloc, predSlot->type());
phi->addInlineInput(predSlot);
// Add append Phis in the block.
block->addPhi(phi);
block->setSlot(i, phi);
}
} else {
block->copySlots(pred);
}
if (!block->predecessors_.append(pred))
return nullptr;
}
return block;
}
MBasicBlock *
MBasicBlock::NewAsmJS(MIRGraph &graph, CompileInfo &info, MBasicBlock *pred, Kind kind)
{
MBasicBlock *block = new(graph.alloc()) MBasicBlock(graph, info, BytecodeSite(), kind);
if (!block->init())
return nullptr;
if (pred) {
block->stackPosition_ = pred->stackPosition_;
if (block->kind_ == PENDING_LOOP_HEADER) {
size_t nphis = block->stackPosition_;
TempAllocator &alloc = graph.alloc();
MPhi *phis = (MPhi*)alloc.allocateArray<sizeof(MPhi)>(nphis);
if (!phis)
return nullptr;
// Note: Phis are inserted in the same order as the slots.
for (size_t i = 0; i < nphis; i++) {
MDefinition *predSlot = pred->getSlot(i);
JS_ASSERT(predSlot->type() != MIRType_Value);
MPhi *phi = new(phis + i) MPhi(alloc, predSlot->type());
JS_ALWAYS_TRUE(phi->reserveLength(2));
phi->addInput(predSlot);
// Add append Phis in the block.
block->addPhi(phi);
block->setSlot(i, phi);
}
} else {
block->copySlots(pred);
}
if (!block->predecessors_.append(pred))
return nullptr;
}
return block;
}
