{
  "good_sequences": [],
  "bad_sequences": [],
  "insights": [
    "Apply mem2reg early - it promotes stack allocations to registers",
    "simplifycfg and instcombine are almost always beneficial",
    "Loop passes (licm, indvars, loop-unroll) help compute-heavy programs",
    "Order matters: mem2reg -> simplifycfg -> instcombine -> gvn -> loop opts"
  ]
}