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[CIR][NFC] Add getBreakTarget method to cir::BreakOp
#1878
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Eventually we should transfer to multiple-entry, multiple-exit regions, which gives this functionality directly. Though it is unclear when they will be upstreamed.
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bcardosolopes
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LGTM after pending comment
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`cir::BreakOp::getBreakTarget` gets the innermost `cir::LoopOpInterface`
or `cir::SwitchOp` containing this `break`.
For example:
```
A: for (...) {
B: for(...) {
break; // target = B
C: switch (...) {
default: break; // target = C
}
break; // target = A
}
```
NOTE: This is a part of a broader effort I am working on to make
querying CIR control flow facts more easily. If folks have any design
notes or ideas, please share them.
---------
Co-authored-by: Tommy McMichen <tommymcmichen@fb.com>
) After #1878, we introduced a dependency from the LoopOpInterface on BreakOp. While here add the BreakOp handling, which will be tests by a pass coming soon. Co-authored-by: Tommy McMichen <tommymcmichen@fb.com>
cir::BreakOp::getBreakTargetgets the innermostcir::LoopOpInterfaceorcir::SwitchOpcontaining thisbreak.For example:
NOTE: This is a part of a broader effort I am working on to make querying CIR control flow facts more easily. If folks have any design notes or ideas, please share them.