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	/// various stages during progressive lowering).			/// various stages during progressive lowering).
	static MaskFormat get1DMaskFormat(Value mask) {			static MaskFormat get1DMaskFormat(Value mask) {
	if (auto c = mask.getDefiningOp<ConstantOp>()) {			if (auto c = mask.getDefiningOp<ConstantOp>()) {
	// Inspect constant dense values. We count up for bits that			// Inspect constant dense values. We count up for bits that
	// are set, count down for bits that are cleared, and bail			// are set, count down for bits that are cleared, and bail
	// when a mix is detected.			// when a mix is detected.
	if (auto denseElts = c.value().dyn_cast<DenseIntElementsAttr>()) {			if (auto denseElts = c.value().dyn_cast<DenseIntElementsAttr>()) {
	int64_t val = 0;			int64_t val = 0;
	for (llvm::APInt b : denseElts)			for (bool b : denseElts.getValues<bool>())
	if (b.getBoolValue() && val >= 0)			if (b && val >= 0)
	val++;			val++;
	else if (!b.getBoolValue() && val <= 0)			else if (!b && val <= 0)
	val--;			val--;
	else			else
	return MaskFormat::Unknown;			return MaskFormat::Unknown;
	if (val > 0)			if (val > 0)
	return MaskFormat::AllTrue;			return MaskFormat::AllTrue;
	if (val < 0)			if (val < 0)
	return MaskFormat::AllFalse;			return MaskFormat::AllFalse;
	}			}
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[mlir] [VectorOps] Cleanup mask 1-d test on constantsClosedPublic