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#include "slang-ir-insts.h"
namespace Slang
{
void SharedIRBuilder::deduplicateAndRebuildGlobalNumberingMap()
{
}
void SharedIRBuilder::replaceGlobalInst(IRInst* oldInst, IRInst* newInst)
{
oldInst->replaceUsesWith(newInst);
}
void SharedIRBuilder::removeHoistableInstFromGlobalNumberingMap(IRInst* instToRemove)
{
HashSet<IRInst*> userWorkListSet;
List<IRInst*> userWorkList;
auto addToWorkList = [&](IRInst* i)
{
if (userWorkListSet.Add(i))
userWorkList.add(i);
};
addToWorkList(instToRemove);
for (Index i = 0; i < userWorkList.getCount(); i++)
{
auto inst = userWorkList[i];
if (getIROpInfo(inst->getOp()).isHoistable())
{
_removeGlobalNumberingEntry(inst);
for (auto use = inst->firstUse; use; use = use->nextUse)
{
addToWorkList(use->getUser());
}
}
}
}
void addHoistableInst(
IRBuilder* builder,
IRInst* inst);
void SharedIRBuilder::tryHoistInst(IRInst* inst)
{
List<IRInst*> workList;
HashSet<IRInst*> workListSet;
workList.add(inst);
workListSet.Add(inst);
IRBuilder builder(inst->getModule());
for (Index i = 0; i < workList.getCount(); i++)
{
auto item = workList[i];
// Does inst no longer depend on anything defined locally?
// If so we should hoist it.
bool shouldHoist = false;
for (UInt a = 0; a < item->getOperandCount(); a++)
{
auto opParent = item->getOperand(a)->getParent();
if (opParent != item->getParent())
{
shouldHoist = true;
break;
}
}
// Hoisting this inst
if (shouldHoist)
{
item->removeFromParent();
addHoistableInst(&builder, item);
// Continue to consider all users for hoisting.
for (auto use = item->firstUse; use; use = use->nextUse)
{
if (getIROpInfo(use->getUser()->getOp()).isHoistable())
{
if (workListSet.Add(use->getUser()))
workList.add(use->getUser());
}
}
}
}
}
}
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