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Co-Authored-By: Rémy Rakic <remy.rakic+github@gmail.com>
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modifiers with custom consistency check function
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This should have used build-pass rather than check-pass.
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Currently, when rustc compiles code with `-Clto` enabled that was built
with different choices for `-Zdwarf-version`, a warning will be
reported. It's very easy to observe this by compiling most anything (eg,
"hello world") and specifying `-Clto -Zdwarf-version=5` since the
standard library is distributed with `-Zdwarf-version=4`.
This behavior isn't actually useful for a few reasons:
- from observation, LLVM chooses to pick the highest DWARF version
anyway after issuing the warning
- Clang specifies that in this case, the max version should be picked
without a warning and as a general principle, we want to support
x-lang LTO with Clang which implies using the same module flag merge
behaviors
- Debuggers need to be able to handle a variety of versions withing the
same debugging session as you can easily have some parts of a binary
(or some dynamic libraries within an application) all compiled with
different DWARF versions
This commit changes the module flag merge behavior to match Clang and
use the highest version of DWARF. It also adds a test to ensure this
behavior is respected in the case of two crates being LTO'd together and
updates the test added in the previous commit to ensure no warning is
printed.
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Signed-off-by: TechVest <techdashen@qq.com>
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This commit is extracted from #122036 and adds a new directive to the
`compiletest` test runner, `//@ needs-threads`. This is intended to
capture the need that a target must implement threading to execute a
specific test, typically one that uses `std::thread`. This is primarily
done for WebAssembly targets which currently do not have threads by
default. This enables transitioning a lot of `//@ ignore-wasm*`-style
ignores into a more self-documenting `//@ needs-threads` directive.
Additionally the `wasm32-wasi-preview1-threads` target, for example,
does actually have threads, but isn't tested in CI at this time. This
change enables running these tests for that target, but not other wasm
targets.
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- Make it more closely match `rustc_errors::Diagnostic`, by making the
field names match, and adding `children`, which requires adding
`rustc_codegen_ssa::back::write::Subdiagnostic`.
- Check that we aren't missing important info when converting
diagnostics.
- Add better comments.
- Tweak `rustc_errors::Diagnostic::replace_args` so that we don't need
to do any cloning when converting diagnostics.
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This is to make the diff when stabilizing it easier to review.
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Co-authored-by: Adrian <adrian.iosdev@gmail.com>
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Fix #90546 by filtering out global value function pointer types from the
type tests, and adding the LowerTypeTests pass to the rustc LTO
optimization pipelines.
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