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Rollup merge of #152552 - androm3da:hexagon-hvx-abi-rules, r=madsmtm

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Add 2048-bit HvxVectorPair support to Hexagon SIMD ABI checks

Previously, rustc rejected HvxVectorPair types in function signatures because the HEXAGON_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI array only had entries for vectors up to 1024 bits. This caused the ABI checker to emit "unsupported vector type" errors for 2048-bit HvxVectorPair (used in 128-byte HVX mode).

Add 2048 byte entry to allow HvxVectorPair to be passed in extern "C" funcs when the hvx-length128b is enabled.
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Stuart Cook 2026-02-13 15:19:15 +11:00 • committed by GitHub
commit b9ce1e0369
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1 changed files with 5 additions and 2 deletions
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7
compiler/rustc_target/src/target_features.rs
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@ -984,8 +984,11 @@ const RISCV_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'stat
const SPARC_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'static str)] = const SPARC_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'static str)] =
&[/*(64, "vis")*/]; &[/*(64, "vis")*/];
const HEXAGON_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'static str)] = const HEXAGON_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'static str)] = &[
&[(512, "hvx-length64b"), (1024, "hvx-length128b")]; (512, "hvx-length64b"), // HvxVector in 64-byte mode
(1024, "hvx-length128b"), // HvxVector in 128-byte mode, or HvxVectorPair in 64-byte mode
(2048, "hvx-length128b"), // HvxVectorPair in 128-byte mode
];
const MIPS_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'static str)] = const MIPS_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'static str)] =
&[(128, "msa")]; &[(128, "msa")];
const CSKY_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'static str)] = const CSKY_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'static str)] =