patschmidt2 commented on issue #16889:
URL: https://github.com/apache/tvm/issues/16889#issuecomment-2074426456
I think you are supposed to call `decompose_reduction `before `blockize`:
```
import tvm
from tvm.script import ir as I
from tvm.script import tir as T
@I.ir_module
class Module:
@T.prim_func
def main():
# with T.block("root"):
A_sum = T.alloc_buffer((1,), "float32")
A = T.alloc_buffer((1, 16), "float32")
for nn, ff in T.grid(1, 16):
with T.block("A"):
v_nn, v_ff = T.axis.remap("SR", [nn, ff])
T.reads(A[v_nn, v_ff])
T.writes(A_sum[v_nn])
with T.init():
A_sum[v_nn] = T.float32(0)
A_sum[v_nn] = A_sum[v_nn] + A[v_nn, v_ff]
sch = tvm.tir.Schedule(Module)
a = sch.get_block("A")
loop_n, loop_f = sch.get_loops(a)
sch.decompose_reduction("A", loop_n)
sch.blockize(loop_f)
init_block = sch.get_block("A_init")
print(sch.mod) # <-- A_init exists
```
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