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This adds the `only-apple`/`ignore-apple` compiletest directive, and
uses that basically everywhere instead of `only-macos`/`ignore-macos`.
Some of the updates in `run-make` are a bit redundant, as they use
`ignore-cross-compile` and won't run on iOS - but using Apple in these
is still more correct, so I've made that change anyhow.
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Add `-Zstack-protector` test for Windows targets
Add variants of the `stack-protector-heuristics-effect.rs` test for 32-bit and 64-bit MSVC Windows and update the original test to run on GNU Windows targets.
I added two tests instead of trying to modify the original because:
- MSVC uses a different function name (`__security_check_cookie` to perform the test rather than doing the test inline and calling `__stack_chk_fail`).
- LLVM's stack protection pass doesn't currently support generating checks for [frames with funclet based EH personality](https://github.com/llvm/llvm-project/blob/37fd3c96b917096d8a550038f6e61cdf0fc4174f/llvm/lib/CodeGen/StackProtector.cpp#L103C1-L109C4).
- 32-bit Windows uses classic EH while 64-bit Windows uses table-based EH which results in slightly different codegen.
[CI run with test passing on {i686,x86_64}-{msvc,mingw}](https://github.com/rust-lang/rust/actions/runs/6275450644/job/17042958375?pr=116037)
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We no longer generate a protector for the strong case in this test,
which is actually the expected behavior per the test comment.
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