Fix silent incorrectness arising from incorrect alias information #152011

zou3519 · 2025-04-23T12:13:20Z

Stack from ghstack (oldest at bottom):

-> Fix silent incorrectness arising from incorrect alias information #152011

There are two problems:

canonicalize_view_scatter_ops adds some new nodes into the graph.
These new nodes cause the alias info on the graph to be wrong. To fix
this, we try to run FakeTensorUpdater on the graph again.
FakeTensorUpdater's alias information is wrong. It tries to skip
nodes that it thinks have "equivalent" FakeTensor metadata.
It should not be allowed to do this if any users of the node can
alias the node. The example
is if we have x = foo(...); y = x.view(...). If the user replaces
foo with a new bar node and sets bar.meta["val"] correctly, then
FakeTensorUpdater still needs to update y's meta["val"] to be a view
of the new bar node.

cc @voznesenskym @penguinwu @EikanWang @jgong5 @Guobing-Chen @XiaobingSuper @zhuhaozhe @blzheng @wenzhe-nrv @jiayisunx @ipiszy @chenyang78 @kadeng @muchulee8 @amjames @chauhang @aakhundov

There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. If the node was not previously seen, we need to recursively update users of the node, even if the meta["val"] looks like it is set correctly. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. [ghstack-poisoned]

pytorch-bot · 2025-04-23T12:13:24Z

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There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. If the node was not previously seen, we need to recursively update users of the node, even if the meta["val"] looks like it is set correctly. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. ghstack-source-id: c0cdce7 Pull Request resolved: #152011

torch/_inductor/fx_passes/reinplace.py

torch/_inductor/fx_utils.py

github-actions · 2025-06-22T17:36:46Z

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There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. [ghstack-poisoned]

There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. ghstack-source-id: 02dcfbd Pull Request resolved: #152011

…rmation" Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. [ghstack-poisoned]

Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. ghstack-source-id: 02dcfbd Pull Request resolved: #152011

…rmation" Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. [ghstack-poisoned]

Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. ghstack-source-id: 53bd88b Pull Request resolved: #152011

…rmation" Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. cc voznesenskym penguinwu EikanWang jgong5 Guobing-Chen XiaobingSuper zhuhaozhe blzheng wenzhe-nrv jiayisunx ipiszy chenyang78 kadeng muchulee8 amjames chauhang aakhundov [ghstack-poisoned]

Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. ghstack-source-id: 6952091 Pull Request resolved: #152011

…rmation" Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. cc voznesenskym penguinwu EikanWang jgong5 Guobing-Chen XiaobingSuper zhuhaozhe blzheng wenzhe-nrv jiayisunx ipiszy chenyang78 kadeng muchulee8 amjames chauhang aakhundov [ghstack-poisoned]

Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. ghstack-source-id: 633075e Pull Request resolved: #152011

…rmation" Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. cc voznesenskym penguinwu EikanWang jgong5 Guobing-Chen XiaobingSuper zhuhaozhe blzheng wenzhe-nrv jiayisunx ipiszy chenyang78 kadeng muchulee8 amjames chauhang aakhundov [ghstack-poisoned]

Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. ghstack-source-id: d1f7bb2 Pull Request resolved: #152011

zou3519 · 2025-06-26T12:57:44Z

@pytorchbot merge

pytorchmergebot · 2025-06-26T12:59:32Z

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Camyll · 2025-06-26T23:52:26Z

@pytorchbot revert -m='cannot land internally. owner will update and reland to fix' -c=ghfirst

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pytorchmergebot · 2025-06-26T23:54:16Z

@zou3519 your PR has been successfully reverted.

…tion (#152011)" This reverts commit 2d39a48. Reverted #152011 on behalf of https://github.com/Camyll due to cannot land internally. owner will update and reland to fix ([comment](#152011 (comment)))

…rmation" Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. cc voznesenskym penguinwu EikanWang jgong5 Guobing-Chen XiaobingSuper zhuhaozhe blzheng wenzhe-nrv jiayisunx ipiszy chenyang78 kadeng muchulee8 amjames chauhang aakhundov [ghstack-poisoned]

Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. ghstack-source-id: 3221560 Pull Request resolved: #152011

…rmation" Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. cc voznesenskym penguinwu EikanWang jgong5 Guobing-Chen XiaobingSuper zhuhaozhe blzheng wenzhe-nrv jiayisunx ipiszy chenyang78 kadeng muchulee8 amjames chauhang aakhundov [ghstack-poisoned]

Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. ghstack-source-id: 7ab523a Pull Request resolved: #152011

…rmation" Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. cc voznesenskym penguinwu EikanWang jgong5 Guobing-Chen XiaobingSuper zhuhaozhe blzheng wenzhe-nrv jiayisunx ipiszy chenyang78 kadeng muchulee8 amjames chauhang aakhundov [ghstack-poisoned]

Fixes #136662 There are two problems: 1) canonicalize_view_scatter_ops adds some new nodes into the graph. These new nodes cause the alias info on the graph to be wrong. To fix this, we try to run FakeTensorUpdater on the graph again. 2) FakeTensorUpdater's alias information is wrong. It tries to skip nodes that it thinks have "equivalent" FakeTensor metadata. It should not be allowed to do this if any users of the node can alias the node. The example is if we have `x = foo(...); y = x.view(...)`. If the user replaces `foo` with a new `bar` node and sets bar.meta["val"] correctly, then FakeTensorUpdater still needs to update y's meta["val"] to be a view of the new bar node. ghstack-source-id: 13054c6 Pull Request resolved: #152011

zou3519 · 2025-06-27T12:37:43Z

@pytorchbot merge

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Composition of torch.compile and torch.func.grad silently produces a wrong result. #136662

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zou3519 changed the title ~~[WIP] fix reinplacing bug~~ Fix reinplacing bug Jun 25, 2025

zou3519 changed the title ~~Fix reinplacing bug~~ Fix silent incorrectness arising from incorrect alias information Jun 25, 2025

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update expected results #157010

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