farshidsp commented on code in PR #15764:
URL: https://github.com/apache/tvm/pull/15764#discussion_r1336337450
##########
python/tvm/relax/transform/legalize_ops/ccl.py:
##########
@@ -46,6 +46,30 @@ def _allreduce(_bb: BlockBuilder, call: Call) -> Expr:
)
+@register_legalize("relax.ccl.allgather")
+def _allgather(_bb: BlockBuilder, call: Call) -> Expr:
+ output_shape = []
+ assert isinstance(
+ call.args[0].struct_info, TensorStructInfo
+ ), "The input struct info of allgather should be TensorStructInfo."
+ assert isinstance(call.args[0].struct_info.shape.struct_info,
ShapeStructInfo)
+ arg_shape = call.args[0].struct_info.shape.struct_info
+ for i, shape_value in enumerate(arg_shape.values):
+ if i == 0:
+ output_shape.append(tir.multiply(shape_value, call.args[1].value))
Review Comment:
That make sense. Resolved.
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