| Issue |
165987
|
| Summary |
[DFAJumpThreading] Extend to simplifying multiple switches.
|
| Labels |
missed-optimization
|
| Assignees |
|
| Reporter |
XChy
|
DFAJumpThreading handles only one threadable switch at a time for now, due to some correctness problems. We could try to extend the implementation to handle multiple switches. There are two possible solutions in my mind now:
The first is:
- Skip collecting the switches that have overlapped blocks with other collected switches.
- Thread collected switches together at last. In this way, we don't need to update invalid loop info.
The second is:
- Get rid of the loop info query in this pass, and still keep compile-time good.
- Iteratively collect and thread only one switch at a time until no threadable switches exist.
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