Trevor Gross 3b8d41161e

Rollup merge of #145709 - heiher:issue-145692-1, r=jackh726 ...

Fix LoongArch C function ABI when passing/returning structs containing floats

Similar to RISC-V, LoongArch passes structs containing only one or two floats (or a float–integer pair) in registers, as long as each element fits into a single corresponding register. Before this PR, Rust did not check the actual offset of the second float or integer; instead, it assumed the standard offset based on the default alignment. However, since the offset can be affected by `#[repr(align(N))]` and `#[repr(packed)]`, this led to miscompilations (see rust-lang/rust#145692). This PR fixes the issue by explicitly specifying the offset for the remainder of the cast.

2025-09-05 01:53:20 -04:00

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asm

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auxiliary

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compiletest-self-test

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libs

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naked-functions

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nvptx-kernel-abi

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sanitizer/kcfi

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simd

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stack-protector

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targets

compiler: Add {x86_64,aarch64,riscv64gc}-unknown-managarm-mlibc targets

2025-08-29 00:49:29 +02:00

aarch64-pointer-auth.rs

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aarch64-xray.rs

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align_offset.rs

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breakpoint.rs

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closure-inherit-target-feature.rs

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cmse.rs

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cstring-merging.rs

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dwarf4.rs

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dwarf5.rs

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dwarf-mixed-versions-lto.rs

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emit-intel-att-syntax.rs

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force-target-feature.rs

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is_aligned.rs

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issue-83585-small-pod-struct-equality.rs

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loongarch-float-struct-abi.rs

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manual-eq-efficient.rs

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niche-prefer-zero.rs

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nvptx-arch-default.rs

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nvptx-arch-emit-asm.rs

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nvptx-arch-link-arg.rs

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nvptx-arch-target-cpu.rs

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nvptx-atomics.rs

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nvptx-c-abi-arg-v7.rs

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nvptx-c-abi-ret-v7.rs

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nvptx-internalizing.rs

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nvptx-linking-binary.rs

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nvptx-linking-cdylib.rs

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nvptx-safe-naming.rs

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panic-no-unwind-no-uwtable.rs

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panic-unwind-no-uwtable.rs

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pic-relocation-model.rs

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pie-relocation-model.rs

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powerpc64-struct-abi.rs

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reg-struct-return.rs

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regparm-module-flag.rs

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riscv-float-struct-abi.rs

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riscv-soft-abi-with-float-features.rs

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rust-abi-arg-attr.rs

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s390x-backchain-toggle.rs

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s390x-vector-abi.rs

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simd-bitmask.rs

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simd-intrinsic-gather.rs

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simd-intrinsic-mask-load.rs

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simd-intrinsic-mask-reduce.rs

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simd-intrinsic-mask-store.rs

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simd-intrinsic-scatter.rs

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simd-intrinsic-select.rs

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slice-is_ascii.rs

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small_data_threshold.rs

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sparc-struct-abi.rs

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stack-probes.rs

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static-relocation-model.rs

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strict_provenance.rs

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target-feature-multiple.rs

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wasm_exceptions.rs

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x86_64-array-pair-load-store-merge.rs

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x86_64-bigint-helpers.rs

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x86_64-cmp.rs

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x86_64-floating-point-clamp.rs

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x86_64-fortanix-unknown-sgx-lvi-generic-load.rs

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x86_64-fortanix-unknown-sgx-lvi-generic-ret.rs

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x86_64-fortanix-unknown-sgx-lvi-inline-assembly.rs

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x86_64-function-return.rs

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x86_64-indirect-branch-cs-prefix.rs

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x86_64-mcount.rs

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x86_64-no-jump-tables.rs

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x86_64-sse_crc.rs

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x86_64-typed-swap.rs

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x86_64-windows-float-abi.rs

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x86_64-windows-i128-abi.rs

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x86_64-xray.rs

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x86-return-float.rs

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