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openedon 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`
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= 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.
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Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Enabling/disabling target features like AVX, Neon, etc.Target: 32-bit Arm processors (armv6, armv7, thumb...), including 64-bit Arm in AArch32 stateRelevant to the compiler team, which will review and decide on the PR/issue.