Implement repr(simd)
as an alias for #[simd]
.
This commit is contained in:
parent
e822a18ae7
commit
c8b6d5b23c
src
librustc/middle
librustc_trans/trans
librustc_typeck/check
libsyntax
test/compile-fail
@ -3312,10 +3312,10 @@ impl<'tcx, 'container> AdtDefData<'tcx, 'container> {
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variants: Vec<VariantDefData<'tcx, 'container>>) -> Self {
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let mut flags = AdtFlags::NO_ADT_FLAGS;
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let attrs = tcx.get_attrs(did);
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if attrs.iter().any(|item| item.check_name("fundamental")) {
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if attr::contains_name(&attrs, "fundamental") {
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flags = flags | AdtFlags::IS_FUNDAMENTAL;
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}
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if attrs.iter().any(|item| item.check_name("simd")) {
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if tcx.lookup_simd(did) {
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flags = flags | AdtFlags::IS_SIMD;
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}
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if Some(did) == tcx.lang_items.phantom_data() {
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@ -6116,6 +6116,7 @@ impl<'tcx> ctxt<'tcx> {
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/// Determine whether an item is annotated with `#[simd]`
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pub fn lookup_simd(&self, did: DefId) -> bool {
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self.has_attr(did, "simd")
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|| self.lookup_repr_hints(did).contains(&attr::ReprSimd)
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}
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/// Obtain the representation annotation for a struct definition.
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@ -615,6 +615,9 @@ fn range_to_inttype(cx: &CrateContext, hint: Hint, bounds: &IntBounds) -> IntTyp
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attr::ReprPacked => {
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cx.tcx().sess.bug("range_to_inttype: found ReprPacked on an enum");
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}
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attr::ReprSimd => {
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cx.tcx().sess.bug("range_to_inttype: found ReprSimd on an enum");
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}
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}
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for &ity in attempts {
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if bounds_usable(cx, ity, bounds) {
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@ -4421,6 +4421,9 @@ pub fn check_enum_variants<'a,'tcx>(ccx: &CrateCtxt<'a,'tcx>,
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"discriminant type specified here");
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}
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}
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attr::ReprSimd => {
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ccx.tcx.sess.bug("range_to_inttype: found ReprSimd on an enum");
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}
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attr::ReprPacked => {
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ccx.tcx.sess.bug("range_to_inttype: found ReprPacked on an enum");
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}
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@ -579,6 +579,7 @@ pub fn find_repr_attrs(diagnostic: &SpanHandler, attr: &Attribute) -> Vec<ReprAt
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// Can't use "extern" because it's not a lexical identifier.
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"C" => Some(ReprExtern),
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"packed" => Some(ReprPacked),
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"simd" => Some(ReprSimd),
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_ => match int_type_of_word(&word) {
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Some(ity) => Some(ReprInt(item.span, ity)),
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None => {
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@ -628,6 +629,7 @@ pub enum ReprAttr {
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ReprInt(Span, IntType),
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ReprExtern,
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ReprPacked,
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ReprSimd,
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}
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impl ReprAttr {
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@ -636,7 +638,8 @@ impl ReprAttr {
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ReprAny => false,
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ReprInt(_sp, ity) => ity.is_ffi_safe(),
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ReprExtern => true,
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ReprPacked => false
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ReprPacked => false,
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ReprSimd => true,
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}
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}
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}
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@ -739,7 +739,7 @@ fn find_repr_type_name(diagnostic: &SpanHandler,
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for a in type_attrs {
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for r in &attr::find_repr_attrs(diagnostic, a) {
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repr_type_name = match *r {
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attr::ReprAny | attr::ReprPacked => continue,
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attr::ReprAny | attr::ReprPacked | attr::ReprSimd => continue,
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attr::ReprExtern => "i32",
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attr::ReprInt(_, attr::SignedInt(ast::TyIs)) => "isize",
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@ -177,6 +177,9 @@ const KNOWN_FEATURES: &'static [(&'static str, &'static str, Status)] = &[
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// Allows macros to appear in the type position.
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("type_macros", "1.3.0", Active),
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// allow `repr(simd)`, and importing the various simd intrinsics
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("simd_basics", "1.3.0", Active),
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];
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// (changing above list without updating src/doc/reference.md makes @cmr sad)
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@ -359,6 +362,7 @@ pub struct Features {
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pub allow_box: bool,
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pub allow_pushpop_unsafe: bool,
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pub simd_ffi: bool,
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pub simd_basics: bool,
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pub unmarked_api: bool,
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pub negate_unsigned: bool,
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/// spans of #![feature] attrs for stable language features. for error reporting
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@ -388,6 +392,7 @@ impl Features {
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allow_box: false,
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allow_pushpop_unsafe: false,
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simd_ffi: false,
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simd_basics: false,
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unmarked_api: false,
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negate_unsigned: false,
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declared_stable_lang_features: Vec::new(),
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@ -660,6 +665,20 @@ impl<'a, 'v> Visitor<'v> for PostExpansionVisitor<'a> {
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if attr::contains_name(&i.attrs[..], "simd") {
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self.gate_feature("simd", i.span,
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"SIMD types are experimental and possibly buggy");
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self.context.span_handler.span_warn(i.span,
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"the `#[simd]` attribute is deprecated, \
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use `#[repr(simd)]` instead");
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}
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for attr in &i.attrs {
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if attr.name() == "repr" {
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for item in attr.meta_item_list().unwrap_or(&[]) {
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if item.name() == "simd" {
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self.gate_feature("simd_basics", i.span,
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"SIMD types are experimental and possibly buggy");
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}
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}
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}
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}
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}
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@ -892,6 +911,7 @@ fn check_crate_inner<F>(cm: &CodeMap, span_handler: &SpanHandler,
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allow_box: cx.has_feature("box_syntax"),
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allow_pushpop_unsafe: cx.has_feature("pushpop_unsafe"),
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simd_ffi: cx.has_feature("simd_ffi"),
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simd_basics: cx.has_feature("simd_basics"),
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unmarked_api: cx.has_feature("unmarked_api"),
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negate_unsigned: cx.has_feature("negate_unsigned"),
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declared_stable_lang_features: accepted_features,
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14
src/test/compile-fail/feature-gate-repr-simd.rs
Normal file
14
src/test/compile-fail/feature-gate-repr-simd.rs
Normal file
@ -0,0 +1,14 @@
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#[repr(simd)]
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struct Foo(u64, u64); //~ error: SIMD types are experimental
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fn main() {}
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