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Add 2048-bit HvxVectorPair support to Hexagon SIMD ABI checks

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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.
This commit is contained in:
Brian Cain 2026-02-12 12:56:00 -06:00
parent bb8b30a5fc
commit eb1e411629
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)] =
&[/*(64, "vis")*/];
const HEXAGON_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'static str)] =
&[(512, "hvx-length64b"), (1024, "hvx-length128b")];
const HEXAGON_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'static str)] = &[
(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)] =
&[(128, "msa")];
const CSKY_FEATURES_FOR_CORRECT_FIXED_LENGTH_VECTOR_ABI: &'static [(u64, &'static str)] =