Files
rust/tests/ui
bors c625102320 Auto merge of #138366 - matthiaskrgr:rollup-cn16m7q, r=matthiaskrgr
Rollup of 10 pull requests

Successful merges:

 - #137715 (Allow int literals for pattern types with int base types)
 - #138002 (Disable CFI for weakly linked syscalls)
 - #138051 (Add support for downloading GCC from CI)
 - #138231 (Prevent ICE in autodiff validation by emitting user-friendly errors)
 - #138245 (stabilize `ci_rustc_if_unchanged_logic` test for local environments)
 - #138256 (Do not feed anon const a type that references generics that it does not have)
 - #138284 (Do not write user type annotation for const param value path)
 - #138296 (Remove `AdtFlags::IS_ANONYMOUS` and `Copy`/`Clone` condition for anonymous ADT)
 - #138352 (miri native_calls: ensure we actually expose *mutable* provenance to the memory FFI can access)
 - #138354 (remove redundant `body`  arguments)

r? `@ghost`
`@rustbot` modify labels: rollup
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UI Tests

This folder contains rustc's UI tests.

Test Directives (Headers)

Typically, a UI test will have some test directives / headers which are special comments that tell compiletest how to build and interpret a test.

As part of an ongoing effort to rewrite compiletest (see https://github.com/rust-lang/compiler-team/issues/536), a major change proposal to change legacy compiletest-style headers // <directive> to ui_test-style headers //@ <directive> was accepted (see https://github.com/rust-lang/compiler-team/issues/512.

An example directive is ignore-test. In legacy compiletest style, the header would be written as

// ignore-test

but in ui_test style, the header would be written as

//@ ignore-test

compiletest is changed to accept only //@ directives for UI tests (currently), and will reject and report an error if it encounters any comments // <content> that may be parsed as a legacy compiletest-style test header. To fix this, you should migrate to the ui_test-style header //@ <content>.