yzh119 commented on issue #12907:
URL: https://github.com/apache/tvm/issues/12907#issuecomment-1264185122
If you don't want to do anything inside `init` block you can just place a
no-op inside it, e.g.
```python
@T.prim_func
def matmul(
A: T.Buffer[(512, 512), "float32"],
B: T.Buffer[(512, 512), "float32"],
C: T.Buffer[(512, 512), "float32"],
)->None:
for i in range(512):
for j in range(512):
for k in range(512):
with T.block("gemm"):
with T.init():
T.evaluate(0)
C[i, j] = C[i, j] + A[i, k] * B[j, k]
```
But there must be a `init` block existing so that the entire block would be
recognized as a reduction block.
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