[win][arm64] Disable MSVC Linker 'Arm Hazard' warning #140758
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jieyouxu
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May 7, 2025
compiler/rustc_target/src/spec/targets/aarch64_pc_windows_msvc.rs
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r? jieyouxu |
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@bors r=jieyouxu rollup |
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@dpaoliello: 🔑 Insufficient privileges: Not in reviewers |
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@dpaoliello: 🔑 Insufficient privileges: not in try users |
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Zalathar
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[win][arm64] Disable MSVC Linker 'Arm Hazard' warning While trying to get the aarch64-msvc build working correctly (rust-lang#140136), I observed the following test failure: From <rust-lang#140136 (comment)> ``` = note: main.main.d17f5fbe6225cf88-cgu.0.rcgu.o : fatal error LNK1322: cannot avoid potential ARM hazard (Cortex-A53 MPCore processor bug #843419) in section 0x57; please consider using compiler option /Gy if it was not used ``` This is warning of a code sequence that triggers a bug in Cortex-A53 processors: <https://developer.arm.com/documentation/epm048406/latest> However, since Windows 10 isn't supported on the Cortex-A53, this warning is not required, so it can be suppressed using the undocumented `/arm64hazardfree` flag.
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Rollup of 15 pull requests Successful merges: - rust-lang#138736 (Sanitizers target modificators) - rust-lang#140260 (Only prefer param-env candidates if they remain non-global after norm) - rust-lang#140523 (Better error message for late/early lifetime param mismatch) - rust-lang#140579 (Remove estebank from automated review assignment) - rust-lang#140641 (detect additional uses of opaques after writeback) - rust-lang#140711 (Do not discard constraints on overflow if there was candidate ambiguity) - rust-lang#140716 (Improve `-Zremap-path-scope` tests with dependency) - rust-lang#140755 ([win][arm64] Disable various DebugInfo tests that don't work on Arm64 Windows) - rust-lang#140756 ([arm64] Pointer auth test should link with C static library statically) - rust-lang#140758 ([win][arm64] Disable MSVC Linker 'Arm Hazard' warning) - rust-lang#140759 ([win][arm64] Disable std::fs tests that require symlinks) - rust-lang#140762 (rustdoc-json: Remove newlines from attributes) - rust-lang#140764 (style: Never break within a nullary function call `func()` or a unit literal `()`) - rust-lang#140769 (Add `DefPathData::OpaqueLifetime` to avoid conflicts for remapped opaque lifetimes) - rust-lang#140773 (triagebot: Better message for changes to `tests/rustdoc-json`) r? `@ghost` `@rustbot` modify labels: rollup
matthiaskrgr
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[win][arm64] Disable MSVC Linker 'Arm Hazard' warning While trying to get the aarch64-msvc build working correctly (rust-lang#140136), I observed the following test failure: From <rust-lang#140136 (comment)> ``` = note: main.main.d17f5fbe6225cf88-cgu.0.rcgu.o : fatal error LNK1322: cannot avoid potential ARM hazard (Cortex-A53 MPCore processor bug #843419) in section 0x57; please consider using compiler option /Gy if it was not used ``` This is warning of a code sequence that triggers a bug in Cortex-A53 processors: <https://developer.arm.com/documentation/epm048406/latest> However, since Windows 10 isn't supported on the Cortex-A53, this warning is not required, so it can be suppressed using the undocumented `/arm64hazardfree` flag.
bors
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…iaskrgr Rollup of 7 pull requests Successful merges: - rust-lang#140716 (Improve `-Zremap-path-scope` tests with dependency) - rust-lang#140732 (make it possible to run in-tree rustfmt with `x run rustfmt`) - rust-lang#140736 (trait selection: check `&` before suggest remove deref) - rust-lang#140755 ([win][arm64] Disable various DebugInfo tests that don't work on Arm64 Windows) - rust-lang#140756 ([arm64] Pointer auth test should link with C static library statically) - rust-lang#140758 ([win][arm64] Disable MSVC Linker 'Arm Hazard' warning) - rust-lang#140759 ([win][arm64] Disable std::fs tests that require symlinks) r? `@ghost` `@rustbot` modify labels: rollup
bors
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…iaskrgr Rollup of 5 pull requests Successful merges: - rust-lang#140736 (trait selection: check `&` before suggest remove deref) - rust-lang#140755 ([win][arm64] Disable various DebugInfo tests that don't work on Arm64 Windows) - rust-lang#140756 ([arm64] Pointer auth test should link with C static library statically) - rust-lang#140758 ([win][arm64] Disable MSVC Linker 'Arm Hazard' warning) - rust-lang#140759 ([win][arm64] Disable std::fs tests that require symlinks) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#140758 - dpaoliello:armhazard, r=jieyouxu [win][arm64] Disable MSVC Linker 'Arm Hazard' warning While trying to get the aarch64-msvc build working correctly (rust-lang#140136), I observed the following test failure: From <rust-lang#140136 (comment)> ``` = note: main.main.d17f5fbe6225cf88-cgu.0.rcgu.o : fatal error LNK1322: cannot avoid potential ARM hazard (Cortex-A53 MPCore processor bug #843419) in section 0x57; please consider using compiler option /Gy if it was not used ``` This is warning of a code sequence that triggers a bug in Cortex-A53 processors: <https://developer.arm.com/documentation/epm048406/latest> However, since Windows 10 isn't supported on the Cortex-A53, this warning is not required, so it can be suppressed using the undocumented `/arm64hazardfree` flag.
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While trying to get the aarch64-msvc build working correctly (#140136), I observed the following test failure:
From #140136 (comment)
This is warning of a code sequence that triggers a bug in Cortex-A53 processors: https://developer.arm.com/documentation/epm048406/latest
However, since Windows 10 isn't supported on the Cortex-A53, this warning is not required, so it can be suppressed using the undocumented
/arm64hazardfreeflag.