[wwwdocs] gcc-15: Add changes for Rust frontend

[Arthur Cohen]

Patch has been committed and pushed upstream.

Best,

Arthur

On 4/25/25 4:30 PM, arthur.cohen@embecosm.com wrote:
> From: Arthur Cohen <arthur.cohen@embecosm.com>
> 
> Content was validated using the Nu HTML checker per the contributing doc.
> 
> ---
>   htdocs/gcc-15/changes.html | 57 ++++++++++++++++++++++++++++++++++++++
>   1 file changed, 57 insertions(+)
> 
> diff --git a/htdocs/gcc-15/changes.html b/htdocs/gcc-15/changes.html
> index 3e3c6655..10b1ce58 100644
> --- a/htdocs/gcc-15/changes.html
> +++ b/htdocs/gcc-15/changes.html
> @@ -702,6 +702,63 @@ asm (".text; %cc0: mov %cc2, %%r0; .previous;"
>     </li>
>   </ul>
>   
> +<h3 id="rust">Rust</h3>
> +<ul>
> +  <li>
> +  Basic inline assembly support has been added to the frontend, which enables us to compile
> +the architecture specific functions of <code>core 1.49</code>.
> +  </li>
> +  <li>
> +  Support for <code>for-loops</code> has been added.
> +  </li>
> +  <li>
> +  Fixes to our automatic dereferencing algorithm for <code>Deref</code> and
> +<code>DerefMut</code>. This makes <code>gccrs</code> more correct and allow to handle
> +complicated cases where the type-checker would previously fail.
> +  </li>
> +  <li>
> +  Fixes to our indexing and iterator traits handling, which was required for
> +<code>for-loops</code> to be properly implemented.
> +  </li>
> +  <li>
> +  Our parser is now fully implemented and fully capable of parsing the entirety of
> +<code>core</code>, <code>alloc</code> and <code>std</code>. It was still lacking in some
> +areas, especially around unstable features like <code>specialization</code>.
> +  </li>
> +  <li>
> +  Support for the question-mark operator has been added. This enables <code>gccrs</code> to
> +handle all the error handling code and machinery often used in real world Rust programs, as
> +well as in <code>core</code>.
> +  </li>
> +  <li>
> +  Fixes to our macro expansion pass which now correctly expands all of <code>core 1.49</code>.
> +This also includes fixes to our <code>format_args!()</code> handling code, which received
> +numerous improvements.
> +  </li>
> +  <li>
> +  Support for <code>let-else</code> has been added. While this is not used in <code>core
> +1.49</code>, it is used in the Rust-for-Linux project, our next major objective for
> +<code>gccrs</code>.
> +  </li>
> +  <li>
> +  Support for the unstable <code>specialization</code> feature has been added. This is
> +required for compiling <code>core 1.49</code> correctly, in which specialization is used to
> +improve the runtime performance of Rust binaries.
> +  </li>
> +  <li>
> +  Support for more <code>lang-items</code> has been added
> +  </li>
> +  <li>
> +  Lowered minimum required Rust version to 1.49. This allows more systems to compile the Rust
> +frontend, and also brings us closer to <code>gccrs</code> compiling its own dependencies down
> +the line.
> +  </li>
> +  <li>
> +  Rewrite of our name resolution algorithm to properly handle the complex import/export
> +structure used in <code>core 1.49</code>
> +  </li>
> +</ul>
> +
>   <!-- .................................................................. -->
>   <h2 id="targets">New Targets and Target Specific Improvements</h2>
>   

-- 
Arthur Cohen <arthur.cohen@embecosm.com>

Toolchain Engineer

Embecosm GmbH

Geschäftsführer: Jeremy Bennett
Niederlassung: Nürnberg
Handelsregister: HR-B 36368
www.embecosm.de

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90429 Nürnberg


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