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[BugFix][Arith] IterMapRewriter abort rewriting once failure #15677

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Merged
merged 1 commit into from
Sep 6, 2023
Merged

[BugFix][Arith] IterMapRewriter abort rewriting once failure #15677

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1 change: 1 addition & 0 deletions src/arith/iter_affine_map.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -322,6 +322,7 @@ class IterMapRewriter : public ExprMutator {
ErrorLogger(this) << "IterMapExpr or subclasses should only result from calls in "
<< "IterMapRewriter using DirectMutate. "
<< "Indirect return occurred in " << input_expr;
return input_expr;
}
return expr;
}
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20 changes: 20 additions & 0 deletions tests/python/unittest/test_arith_iter_affine_map.py
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Expand Up @@ -1292,5 +1292,25 @@ def test_normalize_to_iter_sum():
)


def test_detect_iter_map_with_bufferload_recursion():
n = tvm.tir.Var("n", "int32")
m = tvm.tir.Var("m", "int32")
divisor = tvm.tir.Var("divisor", "int32")

i = tvm.tir.Var("i", "int32")
j = tvm.tir.Var("j", "int32")

buffer = tvm.tir.decl_buffer((n,), "int32", name="seqlen")

indices = [(buffer[i] + j) // divisor]
iter_vars = {
i: tvm.ir.Range(tvm.tir.const(0, "int32"), n),
j: tvm.ir.Range(tvm.tir.const(0, "int32"), m),
}

result = tvm.arith.detect_iter_map(indices, iter_vars)
assert len(result.indices) == 0


if __name__ == "__main__":
tvm.testing.main()