Struct FuseSharedInputMatMul 

pub struct FuseSharedInputMatMul;

Detects two MatMul nodes with the same input and concatenates their weight matrices into a single larger MatMul.

Pattern: %a = matmul(%x, %w1) %b = matmul(%x, %w2) Becomes: %ab = matmul(%x, concat(%w1, %w2)) %a = narrow(%ab, …, 0, n1) %b = narrow(%ab, …, n1, n2)

This saves one full input read (the shared input is read once instead of twice). Critical for SwiGLU (fc11+fc12) and QKV fusion.

Trait Implementations

impl Pass for FuseSharedInputMatMul

fn name(&self) -> &str

Human-readable name for logging.

fn run(&self, graph: Graph) -> Graph

Transform the graph. Returns a new graph (or the same if no changes).