Add tests for three fixed issues (an LLVM crash, an ICE and poor codegen)

[jakubadamw]

Closes #104037.
Closes #112623.
Closes #113899.

[rustbot]

This PR modifies tests/ui/issues/. If this PR is adding new tests to tests/ui/issues/,
please refrain from doing so, and instead add it to more descriptive subdirectories.

[rustbot]

r? @TaKO8Ki

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[Kivooeo]

This PR modifies tests/ui/issues/. If this PR is adding new tests to tests/ui/issues/, please refrain from doing so, and instead add it to more descriptive subdirectories.

Please take this message into account

[rustbot]

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

[jakubadamw]

Please take this message into account

Oops, of course. Done. 🙂

[Kivooeo]

@bors r+ rollup

[rust-bors]

📌 Commit fc9f492 has been approved by Kivooeo

It is now in the queue for this repository.