CVE-2022-23593: Segfault in `simplifyBroadcast` in Tensorflow

size_t maxRank = 0;
for (auto shape : llvm::enumerate(shapes)) {
auto found_shape = analysis.dimensionsForShapeTensor(shape.value());
if (!found_shape) return {};
shapes_found.push_back(*found_shape);
maxRank = std::max(maxRank, found_shape->size());
}

SmallVector<const ShapeComponentAnalysis::SymbolicDimension*>
joined_dimensions(maxRank);