code: def matmul(
      A: T.Buffer((128, 128), "float32"),
      B: T.Buffer((128, 128), "float32"),
      C: T.Buffer((128, 128), "float32"),
  ) -> None:
      for i, j, k in T.grid(128, 128, 128):
          with T.block("C"):
              vi, vj, vk = T.axis.remap("SSR", [i, j, k])
              with T.init():
                  C[vi, vj] = 0.0
              C[vi, vj] = C[vi, vj] + A[vi, vk] * B[vj, vk]
  
file_path: tvm/tests/python/tir-schedule/test_tir_schedule_reorder_block_iter_var.py
imports: import pytest
  import tvm
  import tvm.testing
  from tvm import tir
  from tvm.script import tir
  from tvm.tir.schedule.testing import verify_trace_roundtrip
label_desc: Use image node_id 1 for calling a global function with example usage: matmul(A, B, C) without return types