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Re-land PR #71840 (Rework MIR drop tree lowering) #77466

Merged
merged 10 commits into from
Oct 5, 2020
Merged

Re-land PR #71840 (Rework MIR drop tree lowering) #77466

merged 10 commits into from
Oct 5, 2020

Commits on Oct 4, 2020

  1. Defer creating drop trees in MIR lowering until leaving that scope

    @matthewjasper @Aaron1011
    matthewjasper authored and Aaron1011 committed Oct 4, 2020
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  2. Reduce the number of drop-flag assignments in unwind paths

    @matthewjasper @Aaron1011
    matthewjasper authored and Aaron1011 committed Oct 4, 2020
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  3. Add some more comments

    @matthewjasper @Aaron1011
    matthewjasper authored and Aaron1011 committed Oct 4, 2020
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  4. Address review comments

    @matthewjasper @Aaron1011
    matthewjasper authored and Aaron1011 committed Oct 4, 2020
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  5. Fix rebase fallout

    @Aaron1011
    Aaron1011 committed Oct 4, 2020
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  6. Add regression test for issue rust-lang#72470 

    This was fixed with the upgrade to LLVM 11 in rust-lang#73526.
It seems extremely unlikey that this exact issue will ever reoccur,
since slight modifications to the code caused the crash to stop
happening. However, it can't hurt to have a test for it.
    @Aaron1011
    Aaron1011 committed Oct 4, 2020
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  7. Fix broken link

    @Aaron1011
    Aaron1011 committed Oct 4, 2020
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  8. Bless mir-opt tests

    @Aaron1011
    Aaron1011 committed Oct 4, 2020
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  9. Apply suggestions from review 

    Co-authored-by: matthewjasper <[email protected]>
    @Aaron1011 @matthewjasper
    Aaron1011 and matthewjasper committed Oct 4, 2020
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  10. Bless more test output

    @Aaron1011
    Aaron1011 committed Oct 4, 2020
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