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bors 85f518ec8e Auto merge of #138742 - taiki-e:riscv-vector, r=Amanieu 
rustc_target: Add more RISC-V vector-related features and use zvl*b target features in vector ABI check

Currently, we have only unstable `v` target feature, but RISC-V have more vector-related extensions. The first commit of this PR adds them to unstable `riscv_target_feature`.

- `unaligned-vector-mem`: Has reasonably performant unaligned vector
  - [LLVM definition](https://github.com/llvm/llvm-project/blob/llvmorg-20.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L1379)
  - Similar to currently unstable `unaligned-scalar-mem` target feature, but for vector instructions.
- `zvfh`: Vector Extension for Half-Precision Floating-Point
  - [ISA Manual](https://github.com/riscv/riscv-isa-manual/blob/riscv-isa-release-2336fdc-2025-03-19/src/v-st-ext.adoc#zvfh-vector-extension-for-half-precision-floating-point)
  - [LLVM definition](https://github.com/llvm/llvm-project/blob/llvmorg-20.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L668)
  - This implies `zvfhmin` and `zfhmin`
- `zvfhmin`: Vector Extension for Minimal Half-Precision Floating-Point
  - [ISA Manual](https://github.com/riscv/riscv-isa-manual/blob/riscv-isa-release-2336fdc-2025-03-19/src/v-st-ext.adoc#zvfhmin-vector-extension-for-minimal-half-precision-floating-point)
  - [LLVM definition](https://github.com/llvm/llvm-project/blob/llvmorg-20.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L662)
  - This implies `zve32f`
- `zve32x`, `zve32f`, `zve64x`, `zve64f`, `zve64d`: Vector Extensions for Embedded Processors
  - [ISA Manual](https://github.com/riscv/riscv-isa-manual/blob/riscv-isa-release-2336fdc-2025-03-19/src/v-st-ext.adoc#zve-vector-extensions-for-embedded-processors)
  - [LLVM definitions](https://github.com/llvm/llvm-project/blob/llvmorg-20.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L612-L641)
  - `zve32x` implies `zvl32b`
  - `zve32f` implies `zve32x` and `f`
  - `zve64x` implies `zve32x` and `zvl64b`
  - `zve64f` implies `zve32f` and `zve64x`
  - `zve64d` implies `zve64f` and `d`
  - `v` implies `zve64d`
- `zvl*b`: Minimum Vector Length Standard Extensions
  - [ISA Manual](https://github.com/riscv/riscv-isa-manual/blob/riscv-isa-release-2336fdc-2025-03-19/src/v-st-ext.adoc#zvl-minimum-vector-length-standard-extensions)
  - [LLVM definitions](https://github.com/llvm/llvm-project/blob/llvmorg-20.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L600-L610)
  - `zvl{N}b` implies `zvl{N>>1}b`
  - `v` implies `zvl128b`
- Vector Cryptography and Bit-manipulation Extensions
  - [ISA Manual](https://github.com/riscv/riscv-isa-manual/blob/riscv-isa-release-2336fdc-2025-03-19/src/vector-crypto.adoc)
  - [LLVM definitions](https://github.com/llvm/llvm-project/blob/llvmorg-20.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L679-L807)
  - `zvkb`: Vector Bit-manipulation used in Cryptography
    - This implies `zve32x`
  - `zvbb`: Vector basic bit-manipulation instructions
    - This implies `zvkb`
  - `zvbc`: Vector Carryless Multiplication
    - This implies `zve64x`
  - `zvkg`: Vector GCM instructions for Cryptography
    - This implies `zve32x`
  - `zvkned`: Vector AES Encryption & Decryption (Single Round)
    - This implies `zve32x`
  - `zvknha`: Vector SHA-2 (SHA-256 only))
    - This implies `zve32x`
  - `zvknhb`: Vector SHA-2 (SHA-256 and SHA-512)
    - This implies `zve64x`
    - This is superset of `zvknha`, but doesn't imply that feature at least in LLVM
  - `zvksed`: SM4 Block Cipher Instructions
    - This implies `zve32x`
  - `zvksh`: SM3 Hash Function Instructions
    - This implies `zve32x`
  - `zvkt`: Vector Data-Independent Execution Latency
    - Similar to already stabilized scalar cryptography extension `zkt`.
  - `zvkn`: Shorthand for 'Zvkned', 'Zvknhb', 'Zvkb', and 'Zvkt'
    - Similar to already stabilized scalar cryptography extension `zkn`.
  - `zvknc`: Shorthand for 'Zvkn' and 'Zvbc'
  - `zvkng`: shorthand for 'Zvkn' and 'Zvkg'
  - `zvks`: shorthand for 'Zvksed', 'Zvksh', 'Zvkb', and 'Zvkt'
    - Similar to already stabilized scalar cryptography extension `zks`.
  - `zvksc`: shorthand for 'Zvks' and 'Zvbc'
  - `zvksg`: shorthand for 'Zvks' and 'Zvkg'

Also, our vector ABI check wants `zvl*b` target features, the second commit of this PR updates vector ABI check to use them.

4e2b096ed6/compiler/rustc_target/src/target_features.rs (L707-L708)

---

r? `@Amanieu`

`@rustbot` label +O-riscv +A-target-feature
2025-03-30 02:21:56 +00:00
..
rustc Revert "Use workspace lints for crates in compiler/ #138084" 2025-03-10 18:12:47 +08:00
rustc_abi BackendRepr::is_signed: comment why this may panics 2025-03-29 12:21:51 +01:00
rustc_arena Remove #![warn(unreachable_pub)] from all compiler/ crates. 2025-03-11 13:14:21 +11:00
rustc_ast Rollup merge of #138898 - fmease:decrustify-parser-post-ty-ascr, r=compiler-errors 2025-03-26 19:40:28 +11:00
rustc_ast_ir Use -Wunused_crate_dependencies for compiler crates. 2025-03-20 08:59:43 +11:00
rustc_ast_lowering Don't use kw::Empty in hir::Lifetime::ident. 2025-03-28 10:15:23 +11:00
rustc_ast_passes Rollup merge of #139063 - fmease:fix-tait-atpit-gating, r=oli-obk 2025-03-28 21:18:30 +01:00
rustc_ast_pretty expand: Leave traces when expanding cfg attributes 2025-03-26 15:30:12 +03:00
rustc_attr_data_structures add rustc_macro_edition_2021 2025-03-19 17:37:35 +01:00
rustc_attr_parsing Avoid kw::Empty when dealing with rustc_allowed_through_unstable_modules. 2025-03-25 16:48:03 +11:00
rustc_baked_icu_data Add unreachable_pub to RUSTC_LINT_FLAGS for compiler/ crates. 2025-03-11 13:14:21 +11:00
rustc_borrowck Don't use kw::Empty in hir::Lifetime::ident. 2025-03-28 10:15:23 +11:00
rustc_builtin_macros use slice::contains where applicable 2025-03-28 12:21:21 +00:00
rustc_codegen_cranelift Update compiler-builtins to 0.1.152 2025-03-24 00:29:21 +00:00
rustc_codegen_gcc Auto merge of #138503 - bjorn3:string_merging, r=tmiasko 2025-03-28 10:18:32 +00:00
rustc_codegen_llvm Auto merge of #138742 - taiki-e:riscv-vector, r=Amanieu 2025-03-30 02:21:56 +00:00
rustc_codegen_ssa use slice::contains where applicable 2025-03-28 12:21:21 +00:00
rustc_const_eval Rollup merge of #138713 - RalfJung:memory-hook-pointers, r=oli-obk 2025-03-21 06:56:47 +01:00
rustc_data_structures Add TyCtx::env_var_os 2025-03-26 15:46:05 +01:00
rustc_driver Revert "Use workspace lints for crates in compiler/ #138084" 2025-03-10 18:12:47 +08:00
rustc_driver_impl Implement supported-crate-types print request 2025-03-23 19:08:54 +08:00
rustc_error_codes Avoid kw::Empty when dealing with rustc_allowed_through_unstable_modules. 2025-03-25 16:48:03 +11:00
rustc_error_messages Rollup merge of #138404 - bjorn3:sysroot_handling_cleanup, r=petrochenkov,jieyouxu 2025-03-13 11:28:35 +01:00
rustc_errors Use abs_diff where applicable 2025-03-27 18:29:06 +00:00
rustc_expand Rollup merge of #138844 - petrochenkov:cfgtrace2, r=nnethercote 2025-03-27 13:11:17 -04:00
rustc_feature expand: Leave traces when expanding cfg attributes 2025-03-26 15:30:12 +03:00
rustc_fluent_macro Remove #![warn(unreachable_pub)] from all compiler/ crates. 2025-03-11 13:14:21 +11:00
rustc_fs_util Revert "Use workspace lints for crates in compiler/ #138084" 2025-03-10 18:12:47 +08:00
rustc_graphviz Remove #![warn(unreachable_pub)] from all compiler/ crates. 2025-03-11 13:14:21 +11:00
rustc_hashes Revert "Use workspace lints for crates in compiler/ #138084" 2025-03-10 18:12:47 +08:00
rustc_hir Don't use kw::Empty in hir::Lifetime::ident. 2025-03-28 10:15:23 +11:00
rustc_hir_analysis Remove terminating_scopes hash set. 2025-03-28 22:49:27 +01:00
rustc_hir_pretty Use Option<Ident> for lowered param names. 2025-03-19 20:54:10 +11:00
rustc_hir_typeck Rollup merge of #139086 - meithecatte:expr-use-visitor-cleanup, r=compiler-errors 2025-03-29 11:43:49 +01:00
rustc_incremental Auto merge of #138629 - Zoxc:graph-anon-hashmap, r=oli-obk 2025-03-24 15:02:09 +00:00
rustc_index Use {Decodable,Encodable}_NoContext in type_ir 2025-03-15 06:34:36 +00:00
rustc_index_macros Add unreachable_pub to RUSTC_LINT_FLAGS for compiler/ crates. 2025-03-11 13:14:21 +11:00
rustc_infer Obligation::as_goal 2025-03-23 18:18:47 +00:00
rustc_interface Rollup merge of #138672 - Zoxc:deferred-queries-in-deadlock-handler, r=oli-obk 2025-03-27 15:57:22 +11:00
rustc_lexer Revert "Rollup merge of #136355 - GuillaumeGomez:proc-macro_add_value_retrieval_methods, r=Amanieu" 2025-03-18 13:28:56 +01:00
rustc_lint Rollup merge of #138964 - compiler-errors:usage-of-interner, r=lcnr 2025-03-27 15:57:24 +11:00
rustc_lint_defs add FCW to warn about wasm ABI transition 2025-03-25 08:22:35 +01:00
rustc_llvm coverage: Add LLVM plumbing for expansion regions 2025-03-20 12:40:36 +11:00
rustc_log Use -Wunused_crate_dependencies for compiler crates. 2025-03-20 08:59:43 +11:00
rustc_macros Move codec module back into middle 2025-03-15 06:42:48 +00:00
rustc_metadata less decoding if it has the same syntax context 2025-03-29 17:44:12 +08:00
rustc_middle Auto merge of #129827 - bvanjoi:less-decoding, r=petrochenkov 2025-03-29 16:50:04 +00:00
rustc_mir_build use slice::contains where applicable 2025-03-28 12:21:21 +00:00
rustc_mir_dataflow Auto merge of #138414 - matthiaskrgr:rollup-9ablqdb, r=matthiaskrgr 2025-03-12 17:27:43 +00:00
rustc_mir_transform Drive-by get rid of a bunch of unnecessary :? 2025-03-27 17:45:18 +00:00
rustc_monomorphize Rollup merge of #138980 - tmiasko:collect-var-debug-info, r=compiler-errors 2025-03-27 15:57:25 +11:00
rustc_next_trait_solver Implement lint against using Interner and InferCtxtLike in random compiler crates 2025-03-26 04:39:38 +00:00
rustc_parse Rollup merge of #138844 - petrochenkov:cfgtrace2, r=nnethercote 2025-03-27 13:11:17 -04:00
rustc_parse_format Slim rustc_parse_format dependencies down 2025-03-23 07:30:18 +01:00
rustc_passes use slice::contains where applicable 2025-03-28 12:21:21 +00:00
rustc_pattern_analysis Auto merge of #133889 - compiler-errors:inh-unstable, r=Nadrieril 2025-03-20 14:31:34 +00:00
rustc_privacy privacy: Visit types and traits in impls in type privacy lints 2025-03-25 12:40:02 +03:00
rustc_query_impl Use a function to create QueryStackDeferred to ensure context is Copy 2025-03-26 13:09:36 +01:00
rustc_query_system Rollup merge of #138844 - petrochenkov:cfgtrace2, r=nnethercote 2025-03-27 13:11:17 -04:00
rustc_resolve Rollup merge of #139075 - oli-obk:resolver-item-lifetime, r=compiler-errors 2025-03-28 21:18:32 +01:00
rustc_sanitizers Use -Wunused_crate_dependencies for compiler crates. 2025-03-20 08:59:43 +11:00
rustc_serialize Convert rustc_serialize integration tests to unit tests. 2025-03-20 08:59:50 +11:00
rustc_session use slice::contains where applicable 2025-03-28 12:21:21 +00:00
rustc_smir Use -Wunused_crate_dependencies for compiler crates. 2025-03-20 08:59:43 +11:00
rustc_span Auto merge of #129827 - bvanjoi:less-decoding, r=petrochenkov 2025-03-29 16:50:04 +00:00
rustc_symbol_mangling Use -Wunused_crate_dependencies for compiler crates. 2025-03-20 08:59:43 +11:00
rustc_target Auto merge of #138742 - taiki-e:riscv-vector, r=Amanieu 2025-03-30 02:21:56 +00:00
rustc_trait_selection Don't use kw::Empty in hir::Lifetime::ident. 2025-03-28 10:15:23 +11:00
rustc_traits Rollup merge of #138394 - lcnr:yeet-variant, r=compiler-errors 2025-03-12 10:19:32 -07:00
rustc_transmute Add #[cfg(test)] for Transition in dfa 2025-03-18 07:17:16 +00:00
rustc_ty_utils Don't ICE when encountering placeholders in layout computation 2025-03-24 16:57:07 +00:00
rustc_type_ir Implement lint against using Interner and InferCtxtLike in random compiler crates 2025-03-26 04:39:38 +00:00
rustc_type_ir_macros Fold visit into ty 2025-03-15 06:34:36 +00:00
stable_mir use try_fold instead of fold 2025-03-28 12:14:09 +00:00