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63 lines
2.5 KiB
63 lines
2.5 KiB
1 day ago
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import unittest
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from tinygrad import Tensor
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from tinygrad.ops import PatternMatcher, Ops, UPat, graph_rewrite, RewriteContext, UOp, merge_views
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from tinygrad.engine.schedule import sym
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class TestRewriteTrackedChildren(unittest.TestCase):
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def test_children_in_context(self):
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def print_children(ctx:RewriteContext, sink:UOp):
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view_w_child = sink.src[0].src[0].src[0]
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assert view_w_child.op is Ops.VIEW
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assert set([x.arg for x in ctx.children[view_w_child]]) == set((2,3))
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ctx.update_children()
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assert set([x.arg for x in ctx.children[view_w_child]]) == set((3,4))
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# this is the 3
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assert len(ctx.children[sink.src[0].src[1]]) == 1
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assert next(iter(ctx.children[sink.src[0].src[1]])).op is Ops.ADD
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# this is the 4
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assert len(ctx.children[sink.src[0].src[0]]) == 1
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assert next(iter(ctx.children[sink.src[0].src[0]])).op is Ops.ADD
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rewrite = PatternMatcher([
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(UPat(Ops.CONST, arg=2, name="x"), lambda x: x.replace(arg=4)),
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(UPat(Ops.SINK, name="sink"), print_children)
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])
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a = Tensor(2)
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b = Tensor(3)
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c = a + b
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sink = c.lazydata.sink()
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sink = graph_rewrite(sink, rewrite, track_children=True)
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def test_simple_child(self):
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rewrite = PatternMatcher([
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(UPat(Ops.CONST, arg=2, name="x"), lambda x: x.replace(arg=4)),
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])
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a = Tensor(2)
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b = Tensor(3)
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c = a + b
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sink = c.lazydata
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view_w_child = a.lazydata.src[0]
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print([x().arg for x in view_w_child.children])
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print([x.arg for x in sink.get_children_map()[view_w_child]])
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self.assertSetEqual(set([x.arg for x in sink.get_children_map()[view_w_child]]), set((2,3)))
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# children can either be added to or removed from the map with graph_rewrite
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# added to is easy to detect, just hook the UOp constructor
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# when are children removed?
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# * if a rewrite rule returns a UOp, the matched node is removed from the graph
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sink = graph_rewrite(sink, rewrite)
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print([x().arg for x in view_w_child.children])
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print([x.arg for x in sink.get_children_map()[view_w_child]])
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self.assertSetEqual(set([x.arg for x in sink.get_children_map()[view_w_child]]), set((3,4)))
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@unittest.expectedFailure
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def test_child_after_parent_update(self):
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def print_children(ctx, r):
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ctx.update_children()
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print(ctx.children[r])
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extra = PatternMatcher([(UPat(Ops.REDUCE_AXIS, name="r"), print_children)])
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a = Tensor.empty(3, 3)
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r = (a+0).sum()
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graph_rewrite(r.lazydata, merge_views+sym+extra, track_children=True)
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if __name__ == '__main__':
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unittest.main()
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