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ScalarEvolution: Make required passes transitive to prevent dangling pointers

Authored by srking on Jul 15 2015, 12:19 PM.



ScalarEvolution stores long lived raw pointers to objects owned by unique_ptrs in other passes. In ScalarEvolution, change addRequired() to addRequiredTransitive() to prevent required passes from being freed and thus preven dangling raw pointers.

IMHO, the current design needs a FIXME to eliminate the long lived raw pointers altogether. Barring that, some way to assert() if the raw pointers becomes dangling would help.

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srking updated this revision to Diff 29812.Jul 15 2015, 12:19 PM
srking retitled this revision from to ScalarEvolution: Make required passes transitive to prevent dangling pointers.
srking updated this object.
srking added a subscriber: llvm-commits.
hfinkel accepted this revision.Jul 15 2015, 12:29 PM
hfinkel added a reviewer: hfinkel.
hfinkel added a subscriber: hfinkel.


This revision is now accepted and ready to land.Jul 15 2015, 12:29 PM
craig.topper closed this revision.Jul 23 2015, 12:35 AM
craig.topper added a subscriber: craig.topper.

Committed in r242989