Workaround for llvm bug for f32x3 saturating fp->int opt-level=0 on aarch64 is fixed in LLVM 20 #135982

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1. programmerjake

   added

   C-bugCategory: This is a bug.Category: This is a bug.

   on Jan 24, 2025
2. rustbot

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   needs-triageThis issue may need triage. Remove when done. See docs forge.rust-lang.org/release/issue-triagingThis issue may need triage. Remove when done. See docs forge.rust-lang.org/release/issue-triaging

   on Jan 24, 2025
3. jieyouxu

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   C-cleanupCategory: PRs that clean code up or issues documenting cleanup.Category: PRs that clean code up or issues documenting cleanup.

   A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

   T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

   O-AArch64Armv8-A or later processors in AArch64 modeArmv8-A or later processors in AArch64 mode

   and removed

   C-bugCategory: This is a bug.Category: This is a bug.

   on Jan 24, 2025
4. programmerjake commented on Jan 24, 2025

   

   programmerjake

   on Jan 24, 2025

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   @rustbot label -needs-triage +A-llvm
5. rustbot

   removed

   needs-triageThis issue may need triage. Remove when done. See docs forge.rust-lang.org/release/issue-triagingThis issue may need triage. Remove when done. See docs forge.rust-lang.org/release/issue-triaging

   on Jan 24, 2025
6. jieyouxu

   changed the title [-]tracking issue for workaround for llvm bug for f32x3 saturating fp->int opt-level=0 on aarch64[/-] [+]Workaround for llvm bug for f32x3 saturating fp->int opt-level=0 on aarch64 is fixed in LLVM 20[/+] on Jan 24, 2025
7. jieyouxu

   added

   WG-llvmWorking group: LLVM backend code generationWorking group: LLVM backend code generation

   A-SIMDArea: SIMD (Single Instruction Multiple Data)Area: SIMD (Single Instruction Multiple Data)

   PG-portable-simdProject group: Portable SIMD (https://github.com/rust-lang/project-portable-simd)Project group: Portable SIMD (https://github.com/rust-lang/project-portable-simd)

   T-libsRelevant to the library team, which will review and decide on the PR/issue.Relevant to the library team, which will review and decide on the PR/issue.

   and removed

   T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

   on Jan 24, 2025
8. Jamesbarford commented on Nov 20, 2025

   

   Jamesbarford

   on Nov 20, 2025

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   Triage: I'm a little unsure as to what the issue is here as it is mentioned that it is fixed?
9. programmerjake commented on Nov 20, 2025

   

   programmerjake

   on Nov 20, 2025

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   the point of this issue is so we remember to update our code to remove the workaround once LLVM 20 is the minimum required LLVM version.

   👍React with 👍1Reacted by James Barford-Evans
10. cuviper commented on Mar 11, 2026

    

    cuviper

    on Mar 11, 2026

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    once LLVM 20 is the minimum required LLVM version.

    That's already true since #145071
11. calebzulawski

    closed this as completedin portable-simd#551on Oct 24, 2026