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Compiler does not recognize the reserve-r9 target feature #129558

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Alvenix opened this issue Aug 25, 2024 · 0 comments
Open

Compiler does not recognize the reserve-r9 target feature #129558

Alvenix opened this issue Aug 25, 2024 · 0 comments
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A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-target-feature Area: Enabling/disabling target features like AVX, Neon, etc. O-Arm Target: 32-bit Arm processors (armv6, armv7, thumb...), including 64-bit Arm in AArch32 state T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@Alvenix
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Alvenix commented Aug 25, 2024

This issue is similar to this issue. On the armv7a-none-eabi target, specifying the reserve-r9 target feature using the flag -Ctarget-feature=+reserve-r9 results in the following warning:

warning: unknown and unstable feature specified for `-Ctarget-feature`: `reserve-r9`
  |
  = note: it is still passed through to the codegen backend, but use of this feature might be unsound and the behavior of this feature can change in the future
  = help: consider filing a feature request

The feature is currently working and is used by me and others too.
@rustbot rustbot added the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Aug 25, 2024
@saethlin saethlin added A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. O-Arm Target: 32-bit Arm processors (armv6, armv7, thumb...), including 64-bit Arm in AArch32 state T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. A-target-feature Area: Enabling/disabling target features like AVX, Neon, etc. and removed needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. labels Sep 1, 2024
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A-LLVM Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues. A-target-feature Area: Enabling/disabling target features like AVX, Neon, etc. O-Arm Target: 32-bit Arm processors (armv6, armv7, thumb...), including 64-bit Arm in AArch32 state T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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@Alvenix @saethlin @rustbot