TH3CHARLie opened a new issue, #15877:
URL: https://github.com/apache/tvm/issues/15877
### Expected behavior
Getting reasonable error messages if the schedules like this are not
allowed, or pass compilation.
### Actual behavior
Getting TVMError like "TVMError: cannot make uint from negative value -8"
### Environment
ubuntu 20.04, tvm main branch
### Steps to reproduce
starting with this TIR module:
```python
@I.ir_module
class Module:
@T.prim_func
def main(var_A: T.handle, var_B: T.handle, var_E: T.handle):
T.func_attr({"tir.noalias": T.bool(True)})
n = T.int32()
A = T.match_buffer(var_A, (n,))
B = T.match_buffer(var_B, (n,))
E = T.match_buffer(var_E, (n,))
# with T.block("root"):
C = T.alloc_buffer((n,))
D = T.alloc_buffer((n,))
for i in range(n):
with T.block("C"):
v_i = T.axis.spatial(n, i)
T.reads(A[v_i], B[v_i])
T.writes(C[v_i])
C[v_i] = A[v_i] + B[v_i]
for i in range(n):
with T.block("D"):
v_i = T.axis.spatial(n, i)
T.reads(C[v_i])
T.writes(D[v_i])
D[v_i] = C[v_i] + C[v_i]
for i in range(n):
with T.block("E"):
v_i = T.axis.spatial(n, i)
T.reads(D[v_i], A[v_i])
T.writes(E[v_i])
E[v_i] = D[v_i] + A[v_i]
```
apply the following schedule:
```python
block_e = schedule.get_block("E")
i, = schedule.get_loops(block_e)
schedule.split(i, factors=[None, 8])
i_0, i_1 = schedule.get_loops(block_e)
schedule.split(i_0, factors=[None, 2])
schedule.vectorize(i_1)
i_0_0, i_0_1, i_1 = schedule.get_loops(block_e)
schedule.reorder(i_1, i_0_1, i_0_0)
block_d = schedule.get_block("D")
i_1, i_0_1, i_0_0 = schedule.get_loops(block_e)
schedule.compute_at(block_d, i_0_1)
```
and then build the scheduled module
```
tgt = tvm.target.Target(target="llvm", host="llvm")
mod = tvm.build(schedule.mod, tgt)
```
### Triage
Please refer to the list of label tags
[here](https://github.com/apache/tvm/wiki/Issue-Triage-Labels) to find the
relevant tags and add them below in a bullet format (example below).
* needs-triage
* tir:schedule
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