db0df78580
Bug 1: reduce struct selection — gen_patch selected bi100_plus_accum1_o4 (int8 path, items=32) instead of bi100_plus_float32_o4 (fp32 score accumulator, items=24). vllm paged_attention always uses fp32 for score accumulation, so the wrong struct was injecting items=32 into the 83%-weight hot path. Fix: preference-ordered struct selection — float32 > accum2 > first non-default. Now correctly selects bi100_plus_float32_o4 → NUM_ITEMS_PER_THREAD=24. Bug 2: topk bits_per_pass not injected — gen_patch only extracted threads=512 from topk inline policy_selector, missing calc_bits_per_pass(key_size). For Qwen3.6 float32 logits (key_size=4), bits_per_pass=11 (not 8). Fix: topk-specific extraction that parses calc_bits_per_pass and returns bits_per_pass=11. Now generates RADIX_BITS=11 patch for sampling_kernels.cu. Bug 3: transform/batch_memcpy extraction failed — these headers use policy struct naming, not bi100_* naming, so extract_bi100_structs was empty. Fix: algorithm-specific fallback extraction for transform (reads bi100_bytes_in_flight constexpr) and batch_memcpy (reads threads from policy_selector return). Validation: gen_patch 7 patches (was 6), test_smem_safety 191/191 safe