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Avoid alignment mismatch between ABI and layout for unions. - #104872

Merged

bors merged 9 commits into

rust-lang:masterfrom

luqmana:packed-union-align

May 6, 2023

Merged

Avoid alignment mismatch between ABI and layout for unions.#104872
bors merged 9 commits into
rust-lang:masterfrom
luqmana:packed-union-align

Commits on May 5, 2023
- Do not use scalar layout if there are ZSTs with alignment > 1
  
  oli-obk
  authored and
  luqmana
  committed
  23d09ae
- Add helper methods inherent_align and to_union on Abi.
  luqmana
  committed
  a380053
- Incorporate review feedback from 103926.
  luqmana
  committed
  4f4f22b
- Add test cases for #104802.
  luqmana
  committed
  d5ab3a0
- Add additional test case for repr(packed) allowing union abi opt to kick in.
  luqmana
  committed
  f2d81de
- Factor out checks in layout check and add helper inherent_size.
  luqmana
  committed
  3b1e535
- Don't discard preferred alignment in scalar pair.
  luqmana
  committed
  c63a204
- Review feedback
  luqmana
  committed
  012f9a3
- Reorder to keep duplicate checks in sync.
  luqmana
  committed
  8e7714d