void BlockState::updateForwardSetForWrite(RLEContext &Ctx, unsigned bit) {
// This is a store, invalidate any location that this location may alias, as
// their values can no longer be forwarded.
LSLocation &R = Ctx.getLSLocation(bit);
for (unsigned i = 0; i < ForwardSetIn.size(); ++i) {
if (!isTrackingLSLocation(i))
continue;
LSLocation &L = Ctx.getLSLocation(i);
if (!L.isMayAliasLSLocation(R, Ctx.getAA()))
continue;
// MayAlias, invalidate the LSLocation.
stopTrackingLSLocation(i);
}
// Start tracking this LSLocation.
startTrackingLSLocation(bit);
}
void BlockState::processUnknownWriteInst(RLEContext &Ctx, SILInstruction *I,
RLEKind Kind) {
auto *AA = Ctx.getAA();
for (unsigned i = 0; i < ForwardSetIn.size(); ++i) {
if (!isTrackingLSLocation(i))
continue;
// Invalidate any location this instruction may write to.
//
// TODO: checking may alias with Base is overly conservative,
// we should check may alias with base plus projection path.
LSLocation &R = Ctx.getLSLocation(i);
if (!AA->mayWriteToMemory(I, R.getBase()))
continue;
// MayAlias.
stopTrackingLSLocation(i);
stopTrackingLSValue(i);
}
}
