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bb587b1a17
rust/compiler
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bors bb587b1a17 Auto merge of #80652 - calebzulawski:simd-lanes, r=nagisa 
Improve SIMD type element count validation

Resolves rust-lang/stdsimd#53.

These changes are motivated by `stdsimd` moving in the direction of const generic vectors, e.g.:
```rust
#[repr(simd)]
struct SimdF32<const N: usize>([f32; N]);
```

This makes a few changes:
* Establishes a maximum SIMD lane count of 2^16 (65536).  This value is arbitrary, but attempts to validate lane count before hitting potential errors in the backend.  It's not clear what LLVM's maximum lane count is, but cranelift's appears to be much less than `usize::MAX`, at least.
* Expands some SIMD intrinsics to support arbitrary lane counts.  This resolves the ICE in the linked issue.
* Attempts to catch invalid-sized vectors during typeck when possible.

Unresolved questions:
* Generic-length vectors can't be validated in typeck and are only validated after monomorphization while computing layout.  This "works", but the errors simply bail out with no context beyond the name of the type.  Should these errors instead return `LayoutError` or otherwise provide context in some way?  As it stands, users of `stdsimd` could trivially produce monomorphization errors by making zero-length vectors.

cc `@bjorn3`
2021-02-07 22:25:14 +00:00
..
rustc just max_level_info 2020-09-11 09:37:51 -07:00
rustc_apfloat Backport another LLVM commit to rustc_apfloat 2020-10-04 02:02:25 +02:00
rustc_arena Rollup merge of #80470 - SimonSapin:array-intoiter-type, r=m-ou-se 2021-01-31 01:47:25 +01:00
rustc_ast Rollup merge of #81645 - m-ou-se:panic-lint, r=estebank,flip1995 2021-02-04 21:10:36 +01:00
rustc_ast_lowering lowering of generic args in AssocTyConstraint 2021-02-04 16:20:58 +01:00
rustc_ast_passes Auto merge of #81346 - hug-dev:nonsecure-call-abi, r=jonas-schievink 2021-02-03 06:00:43 +00:00
rustc_ast_pretty Box the biggest ast::ItemKind variants 2021-02-01 09:23:39 +01:00
rustc_attr Never MIR inline functions with a different instruction set 2021-02-05 00:00:00 +00:00
rustc_builtin_macros expand/resolve: Turn #[derive] into a regular macro attribute 2021-02-07 20:08:45 +03:00
rustc_codegen_cranelift Add a new ABI to support cmse_nonsecure_call 2021-02-02 13:04:31 +00:00
rustc_codegen_llvm Auto merge of #80652 - calebzulawski:simd-lanes, r=nagisa 2021-02-07 22:25:14 +00:00
rustc_codegen_ssa rustc_codegen_ssa: tune codegen scheduling to reduce memory usage 2021-02-03 18:55:05 -08:00
rustc_data_structures Rollup merge of #81771 - tgnottingham:time-passes-rss-delta, r=oli-obk 2021-02-05 12:26:08 +01:00
rustc_driver Indicate both start and end of pass RSS in time-passes output 2021-01-29 12:46:29 -08:00
rustc_error_codes Auto merge of #80652 - calebzulawski:simd-lanes, r=nagisa 2021-02-07 22:25:14 +00:00
rustc_errors Make panic/assert calls in rustc compatible with Rust 2021. 2021-02-03 22:42:53 +01:00
rustc_expand Address review comments 2021-02-07 20:08:45 +03:00
rustc_feature Feature gate macro attributes in #[derive] output 2021-02-07 20:08:45 +03:00
rustc_fs_util Optimize away a fs::metadata call. 2021-01-06 08:33:15 -08:00
rustc_graphviz remove redundant closures (clippy::redundant_closure) 2021-01-03 13:34:24 +01:00
rustc_hir Rollup merge of #81680 - camsteffen:primty, r=oli-obk 2021-02-06 17:01:45 +01:00
rustc_hir_pretty hir pretty printing 2021-02-04 16:20:57 +01:00
rustc_incremental Auto merge of #80957 - tgnottingham:direct_serialize_depgraph, r=michaelwoerister 2021-01-19 19:36:41 +00:00
rustc_index Auto merge of #81498 - thomaseizinger:ice-workaround-56935-rustc-index, r=matthewjasper 2021-02-07 08:09:58 +00:00
rustc_infer tidy: Run tidy style against markdown files. 2021-02-04 09:01:50 -08:00
rustc_interface Box the biggest ast::ItemKind variants 2021-02-01 09:23:39 +01:00
rustc_lexer Return EOF_CHAR constant instead of magic char. 2021-01-07 13:20:04 +01:00
rustc_lint expand/resolve: Turn #[derive] into a regular macro attribute 2021-02-07 20:08:45 +03:00
rustc_lint_defs expand/resolve: Turn #[derive] into a regular macro attribute 2021-02-07 20:08:45 +03:00
rustc_llvm Add a new ABI to support cmse_nonsecure_call 2021-02-02 13:04:31 +00:00
rustc_macros Indent the code correctly again after removing the query categories. 2021-01-31 21:40:03 +01:00
rustc_metadata Auto merge of #81215 - cjgillot:defkey-mir, r=oli-obk 2021-02-05 18:21:47 +00:00
rustc_middle Auto merge of #80652 - calebzulawski:simd-lanes, r=nagisa 2021-02-07 22:25:14 +00:00
rustc_mir Never MIR inline functions with a different instruction set 2021-02-05 00:00:00 +00:00
rustc_mir_build Auto merge of #80632 - Nadrieril:fix-80501, r=varkor 2021-02-07 16:48:57 +00:00
rustc_parse expand/resolve: Turn #[derive] into a regular macro attribute 2021-02-07 20:08:45 +03:00
rustc_parse_format rustc_parse_format: Fix character indices in find_skips 2021-01-17 17:40:58 +03:00
rustc_passes Bump rustfmt version 2021-02-02 09:09:52 -05:00
rustc_plugin_impl Store ForeignItem in a side table. 2020-11-26 21:29:27 +01:00
rustc_privacy more things are const evaluatable *sparkles* 2021-02-01 20:05:50 +00:00
rustc_query_system Auto merge of #80692 - Aaron1011:feature/query-result-debug, r=estebank 2021-01-26 05:47:23 +00:00
rustc_resolve Feature gate macro attributes in #[derive] output 2021-02-07 20:08:45 +03:00
rustc_save_analysis Use Option::map_or instead of .map(..).unwrap_or(..) 2021-01-14 19:23:59 +01:00
rustc_serialize Revert stabilizing integer::BITS. 2021-02-03 22:23:58 +01:00
rustc_session Auto merge of #79253 - rcvalle:fix-rustc-sysroot-cas, r=nagisa 2021-02-05 22:58:13 +00:00
rustc_span Feature gate macro attributes in #[derive] output 2021-02-07 20:08:45 +03:00
rustc_symbol_mangling Rollup merge of #80959 - jhpratt:unsigned_abs-stabilization, r=m-ou-se 2021-01-30 13:36:44 +09:00
rustc_target Auto merge of #81346 - hug-dev:nonsecure-call-abi, r=jonas-schievink 2021-02-03 06:00:43 +00:00
rustc_trait_selection Rollup merge of #81738 - camelid:misc-small-diag-cleanup, r=lcnr 2021-02-06 17:01:49 +01:00
rustc_traits Update Chalk 2021-02-02 12:37:22 -05:00
rustc_ty_utils Infallible version of def_span. 2021-01-23 13:35:22 +01:00
rustc_type_ir Move a few more types to rustc_type_ir 2021-01-18 21:06:12 +01:00
rustc_typeck Auto merge of #80652 - calebzulawski:simd-lanes, r=nagisa 2021-02-07 22:25:14 +00:00