llvm-18.1.6

[Bruce Dubbs]

New point version.

[Xi Ruoyao]

18.1.1:

• Tom Stellard: Bump version to 18.1.1 (dba2a75e9c7e)
• Tobias Hieta: Remove RC suffix (b92012c777e6)

Let's wait for the final 18.1.x release as always.

[Bruce Dubbs]

Now version 18.1.1.

[Xi Ruoyao]

Replying to Bruce Dubbs:

Now version 18.1.1.

For LLVM we normally wait for the last point release (18.1.5 or 18.1.6) for a major.minor series unless there's an urgent reason to update, because point releases come per 2 weeks before the final one.

[Xi Ruoyao]

Now 18.1.2: ​https://discourse.llvm.org/t/18-1-2-released/77821

[Xi Ruoyao]

​https://llvm.org/ says the last 18.1.x release is expected to be 18.1.5. 18.1.6 will only be released if really necessary.

[Xi Ruoyao]

It seems we need an update to 18.1.2 (renodr reported some strange issue triggering "GPU reset" running GTK4 things on AMDGPU with LLVM-18.1.0 is fixed with 18.1.2).

[Xi Ruoyao]

Fixed r12.1-345-gbd8a9ea0de.

[Bruce Dubbs]

Now version 18.1.3.

[Xi Ruoyao]

Still wait for 18.1.5.

Do I need to change the changelog to say "addresses #19438" instead of "fixes #19438" for 18.1.2 update?

[Xi Ruoyao]

Now 18.1.4.

[Xi Ruoyao]

Now 18.1.5. The release note of 18.1.5 says 18.1.6 will be the last 18.1 release.

[Xi Ruoyao]

Now 18.1.6. And we may need to add libclc to support mesa >= 24.1.

It seems libclc needs ​https://github.com/KhronosGroup/SPIRV-LLVM-Translator which needs an installed LLVM, so we have to install libclc as a separate package.

[Xi Ruoyao]

4 tests fail because BLFS has removed pyyaml.

[Xi Ruoyao]

Replying to Xi Ruoyao:

4 tests fail because BLFS has removed pyyaml.

pyyaml has been restored. Need to add it into the dependency list.

[Xi Ruoyao]

• 18.1.3: ​https://discourse.llvm.org/t/18-1-3-released/78136
• 18.1.4: ​https://discourse.llvm.org/t/18-1-4-released/78430
• 18.1.5: ​https://discourse.llvm.org/t/18-1-5-released/78740
• 18.1.6: ​https://discourse.llvm.org/t/18-1-6-released/79068

[Xi Ruoyao]

r12.1-873-ga06c874f1b

[Douglas R. Reno]

CVE-2024-31852 exists for a miscompile on ARM. I'll file an advisory for the few ARM users that we have.

LLVM before 18.1.3 generates code in which the LR register can be overwritten without 
data being saved to the stack, and thus there can sometimes be an exploitable error in 
the flow of control. This affects the ARM backend and can be demonstrated with Clang.

[Xi Ruoyao]

Hmm should we attempt to make a SA for non-LFS or non-BLFS configuration? If we do we may have much more SAs. (For example xz incident...)