| Issue |
83422
|
| Summary |
[DAG] Nodes should be consistently processed in topological order
|
| Labels |
llvm:SelectionDAG
|
| Assignees |
|
| Reporter |
RKSimon
|
@deadalnix has done a lot of work on this, but there is still a great deal to do, and really the work needs to be split between a lot more people.
The WIP draft PR is currently at https://github.com/llvm/llvm-project/pull/77475 - but the individual regressions need to be raised as their own issues/PRs to be addressed. So far #77475 only covers X86 but once more of those regressions have been addressed we can begin to add in the diffs from other targets as well.
A common problem is that existing fold patterns are too rigid - often they could be replaced with a value tracking test instead of matching a specific node.
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