From 5af56cac38fa48e4228e5e123d060e85eb1acbf7 Mon Sep 17 00:00:00 2001 From: Luca Versari Date: Sat, 13 Jul 2024 19:35:05 +0200 Subject: [PATCH] Emit error when calling/declaring functions with unavailable vectors. On some architectures, vector types may have a different ABI when relevant target features are enabled. As discussed in https://github.com/rust-lang/lang-team/issues/235, this turns out to very easily lead to unsound code. This commit makes it an error to declare or call functions using those vector types in a context in which the corresponding target features are disabled, if using an ABI for which the difference is relevant. --- compiler/rustc_lint_defs/src/builtin.rs | 67 +++++++++++ compiler/rustc_monomorphize/messages.ftl | 9 ++ compiler/rustc_monomorphize/src/collector.rs | 5 + .../src/collector/abi_check.rs | 111 ++++++++++++++++++ compiler/rustc_monomorphize/src/errors.rs | 18 +++ compiler/rustc_target/src/target_features.rs | 17 +++ tests/crashes/131342-2.rs | 40 ------- tests/crashes/131342.rs | 1 - tests/ui/layout/post-mono-layout-cycle-2.rs | 1 - .../ui/layout/post-mono-layout-cycle-2.stderr | 10 +- tests/ui/layout/post-mono-layout-cycle.rs | 1 - tests/ui/layout/post-mono-layout-cycle.stderr | 10 +- tests/ui/simd-abi-checks.rs | 81 +++++++++++++ tests/ui/simd-abi-checks.stderr | 93 +++++++++++++++ tests/ui/sse-abi-checks.rs | 24 ++++ tests/ui/sse-abi-checks.stderr | 13 ++ 16 files changed, 448 insertions(+), 53 deletions(-) create mode 100644 compiler/rustc_monomorphize/src/collector/abi_check.rs delete mode 100644 tests/crashes/131342-2.rs create mode 100644 tests/ui/simd-abi-checks.rs create mode 100644 tests/ui/simd-abi-checks.stderr create mode 100644 tests/ui/sse-abi-checks.rs create mode 100644 tests/ui/sse-abi-checks.stderr diff --git a/compiler/rustc_lint_defs/src/builtin.rs b/compiler/rustc_lint_defs/src/builtin.rs index 45a5ce0ca20e9..2dd4a3f026906 100644 --- a/compiler/rustc_lint_defs/src/builtin.rs +++ b/compiler/rustc_lint_defs/src/builtin.rs @@ -16,6 +16,7 @@ declare_lint_pass! { /// that are used by other parts of the compiler. HardwiredLints => [ // tidy-alphabetical-start + ABI_UNSUPPORTED_VECTOR_TYPES, ABSOLUTE_PATHS_NOT_STARTING_WITH_CRATE, AMBIGUOUS_ASSOCIATED_ITEMS, AMBIGUOUS_GLOB_IMPORTS, @@ -5078,3 +5079,69 @@ declare_lint! { }; crate_level_only } + +declare_lint! { + /// The `abi_unsupported_vector_types` lint detects function definitions and calls + /// whose ABI depends on enabling certain target features, but those features are not enabled. + /// + /// ### Example + /// + /// ```rust,ignore (fails on non-x86_64) + /// extern "C" fn missing_target_feature(_: std::arch::x86_64::__m256) { + /// todo!() + /// } + /// + /// #[target_feature(enable = "avx")] + /// unsafe extern "C" fn with_target_feature(_: std::arch::x86_64::__m256) { + /// todo!() + /// } + /// + /// fn main() { + /// let v = unsafe { std::mem::zeroed() }; + /// unsafe { with_target_feature(v); } + /// } + /// ``` + /// + /// ```text + /// warning: ABI error: this function call uses a avx vector type, which is not enabled in the caller + /// --> lint_example.rs:18:12 + /// | + /// | unsafe { with_target_feature(v); } + /// | ^^^^^^^^^^^^^^^^^^^^^^ function called here + /// | + /// = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + /// = note: for more information, see issue #116558 + /// = help: consider enabling it globally (-C target-feature=+avx) or locally (#[target_feature(enable="avx")]) + /// = note: `#[warn(abi_unsupported_vector_types)]` on by default + /// + /// + /// warning: ABI error: this function definition uses a avx vector type, which is not enabled + /// --> lint_example.rs:3:1 + /// | + /// | pub extern "C" fn with_target_feature(_: std::arch::x86_64::__m256) { + /// | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function defined here + /// | + /// = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + /// = note: for more information, see issue #116558 + /// = help: consider enabling it globally (-C target-feature=+avx) or locally (#[target_feature(enable="avx")]) + /// ``` + /// + /// + /// + /// ### Explanation + /// + /// The C ABI for `__m256` requires the value to be passed in an AVX register, + /// which is only possible when the `avx` target feature is enabled. + /// Therefore, `missing_target_feature` cannot be compiled without that target feature. + /// A similar (but complementary) message is triggered when `with_target_feature` is called + /// by a function that does not enable the `avx` target feature. + /// + /// Note that this lint is very similar to the `-Wpsabi` warning in `gcc`/`clang`. + pub ABI_UNSUPPORTED_VECTOR_TYPES, + Warn, + "this function call or definition uses a vector type which is not enabled", + @future_incompatible = FutureIncompatibleInfo { + reason: FutureIncompatibilityReason::FutureReleaseErrorDontReportInDeps, + reference: "issue #116558 ", + }; +} diff --git a/compiler/rustc_monomorphize/messages.ftl b/compiler/rustc_monomorphize/messages.ftl index 7210701d4828c..6da387bbebcc7 100644 --- a/compiler/rustc_monomorphize/messages.ftl +++ b/compiler/rustc_monomorphize/messages.ftl @@ -1,3 +1,12 @@ +monomorphize_abi_error_disabled_vector_type_call = + ABI error: this function call uses a vector type that requires the `{$required_feature}` target feature, which is not enabled in the caller + .label = function called here + .help = consider enabling it globally (`-C target-feature=+{$required_feature}`) or locally (`#[target_feature(enable="{$required_feature}")]`) +monomorphize_abi_error_disabled_vector_type_def = + ABI error: this function definition uses a vector type that requires the `{$required_feature}` target feature, which is not enabled + .label = function defined here + .help = consider enabling it globally (`-C target-feature=+{$required_feature}`) or locally (`#[target_feature(enable="{$required_feature}")]`) + monomorphize_couldnt_dump_mono_stats = unexpected error occurred while dumping monomorphization stats: {$error} diff --git a/compiler/rustc_monomorphize/src/collector.rs b/compiler/rustc_monomorphize/src/collector.rs index b4d084d4dffc4..82de64cbce047 100644 --- a/compiler/rustc_monomorphize/src/collector.rs +++ b/compiler/rustc_monomorphize/src/collector.rs @@ -205,6 +205,7 @@ //! this is not implemented however: a mono item will be produced //! regardless of whether it is actually needed or not. +mod abi_check; mod move_check; use std::path::PathBuf; @@ -766,6 +767,7 @@ impl<'a, 'tcx> MirVisitor<'tcx> for MirUsedCollector<'a, 'tcx> { self.used_mentioned_items.insert(MentionedItem::Fn(callee_ty)); let callee_ty = self.monomorphize(callee_ty); self.check_fn_args_move_size(callee_ty, args, *fn_span, location); + abi_check::check_call_site_abi(tcx, callee_ty, *fn_span, self.body.source.instance); visit_fn_use(self.tcx, callee_ty, true, source, &mut self.used_items) } mir::TerminatorKind::Drop { ref place, .. } => { @@ -1207,6 +1209,9 @@ fn collect_items_of_instance<'tcx>( mentioned_items: &mut MonoItems<'tcx>, mode: CollectionMode, ) { + // Check the instance for feature-dependent ABI. + abi_check::check_instance_abi(tcx, instance); + let body = tcx.instance_mir(instance.def); // Naively, in "used" collection mode, all functions get added to *both* `used_items` and // `mentioned_items`. Mentioned items processing will then notice that they have already been diff --git a/compiler/rustc_monomorphize/src/collector/abi_check.rs b/compiler/rustc_monomorphize/src/collector/abi_check.rs new file mode 100644 index 0000000000000..6b825019f2026 --- /dev/null +++ b/compiler/rustc_monomorphize/src/collector/abi_check.rs @@ -0,0 +1,111 @@ +//! This module ensures that if a function's ABI requires a particular target feature, +//! that target feature is enabled both on the callee and all callers. +use rustc_hir::CRATE_HIR_ID; +use rustc_middle::ty::{self, Instance, InstanceKind, ParamEnv, Ty, TyCtxt}; +use rustc_session::lint::builtin::ABI_UNSUPPORTED_VECTOR_TYPES; +use rustc_span::def_id::DefId; +use rustc_span::{Span, Symbol}; +use rustc_target::abi::call::{FnAbi, PassMode}; +use rustc_target::abi::{Abi, RegKind}; + +use crate::errors::{AbiErrorDisabledVectorTypeCall, AbiErrorDisabledVectorTypeDef}; + +fn uses_vector_registers(mode: &PassMode, abi: &Abi) -> bool { + match mode { + PassMode::Ignore | PassMode::Indirect { .. } => false, + PassMode::Cast { pad_i32: _, cast } => { + cast.prefix.iter().any(|r| r.is_some_and(|x| x.kind == RegKind::Vector)) + || cast.rest.unit.kind == RegKind::Vector + } + PassMode::Direct(..) | PassMode::Pair(..) => matches!(abi, Abi::Vector { .. }), + } +} + +fn do_check_abi<'tcx>( + tcx: TyCtxt<'tcx>, + abi: &FnAbi<'tcx, Ty<'tcx>>, + target_feature_def: DefId, + emit_err: impl Fn(&'static str), +) { + let Some(feature_def) = tcx.sess.target.features_for_correct_vector_abi() else { + return; + }; + let codegen_attrs = tcx.codegen_fn_attrs(target_feature_def); + for arg_abi in abi.args.iter().chain(std::iter::once(&abi.ret)) { + let size = arg_abi.layout.size; + if uses_vector_registers(&arg_abi.mode, &arg_abi.layout.abi) { + // Find the first feature that provides at least this vector size. + let feature = match feature_def.iter().find(|(bits, _)| size.bits() <= *bits) { + Some((_, feature)) => feature, + None => { + emit_err(""); + continue; + } + }; + let feature_sym = Symbol::intern(feature); + if !tcx.sess.unstable_target_features.contains(&feature_sym) + && !codegen_attrs.target_features.iter().any(|x| x.name == feature_sym) + { + emit_err(feature); + } + } + } +} + +/// Checks that the ABI of a given instance of a function does not contain vector-passed arguments +/// or return values for which the corresponding target feature is not enabled. +pub(super) fn check_instance_abi<'tcx>(tcx: TyCtxt<'tcx>, instance: Instance<'tcx>) { + let param_env = ParamEnv::reveal_all(); + let Ok(abi) = tcx.fn_abi_of_instance(param_env.and((instance, ty::List::empty()))) else { + // An error will be reported during codegen if we cannot determine the ABI of this + // function. + return; + }; + do_check_abi(tcx, abi, instance.def_id(), |required_feature| { + let span = tcx.def_span(instance.def_id()); + tcx.emit_node_span_lint( + ABI_UNSUPPORTED_VECTOR_TYPES, + CRATE_HIR_ID, + span, + AbiErrorDisabledVectorTypeDef { span, required_feature }, + ); + }) +} + +/// Checks that a call expression does not try to pass a vector-passed argument which requires a +/// target feature that the caller does not have, as doing so causes UB because of ABI mismatch. +pub(super) fn check_call_site_abi<'tcx>( + tcx: TyCtxt<'tcx>, + ty: Ty<'tcx>, + span: Span, + caller: InstanceKind<'tcx>, +) { + let param_env = ParamEnv::reveal_all(); + let callee_abi = match *ty.kind() { + ty::FnPtr(..) => tcx.fn_abi_of_fn_ptr(param_env.and((ty.fn_sig(tcx), ty::List::empty()))), + ty::FnDef(def_id, args) => { + // Intrinsics are handled separately by the compiler. + if tcx.intrinsic(def_id).is_some() { + return; + } + let instance = ty::Instance::expect_resolve(tcx, param_env, def_id, args, span); + tcx.fn_abi_of_instance(param_env.and((instance, ty::List::empty()))) + } + _ => { + panic!("Invalid function call"); + } + }; + + let Ok(callee_abi) = callee_abi else { + // ABI failed to compute; this will not get through codegen. + return; + }; + do_check_abi(tcx, callee_abi, caller.def_id(), |required_feature| { + tcx.emit_node_span_lint( + ABI_UNSUPPORTED_VECTOR_TYPES, + CRATE_HIR_ID, + span, + AbiErrorDisabledVectorTypeCall { span, required_feature }, + ); + }) +} diff --git a/compiler/rustc_monomorphize/src/errors.rs b/compiler/rustc_monomorphize/src/errors.rs index d5fae6e23cb45..5048a8d5d993f 100644 --- a/compiler/rustc_monomorphize/src/errors.rs +++ b/compiler/rustc_monomorphize/src/errors.rs @@ -92,3 +92,21 @@ pub(crate) struct StartNotFound; pub(crate) struct UnknownCguCollectionMode<'a> { pub mode: &'a str, } + +#[derive(LintDiagnostic)] +#[diag(monomorphize_abi_error_disabled_vector_type_def)] +#[help] +pub(crate) struct AbiErrorDisabledVectorTypeDef<'a> { + #[label] + pub span: Span, + pub required_feature: &'a str, +} + +#[derive(LintDiagnostic)] +#[diag(monomorphize_abi_error_disabled_vector_type_call)] +#[help] +pub(crate) struct AbiErrorDisabledVectorTypeCall<'a> { + #[label] + pub span: Span, + pub required_feature: &'a str, +} diff --git a/compiler/rustc_target/src/target_features.rs b/compiler/rustc_target/src/target_features.rs index e92366d5c5c3f..0d16c9a96aa6c 100644 --- a/compiler/rustc_target/src/target_features.rs +++ b/compiler/rustc_target/src/target_features.rs @@ -522,6 +522,13 @@ pub fn all_known_features() -> impl Iterator { .map(|(f, s, _)| (f, s)) } +// These arrays represent the least-constraining feature that is required for vector types up to a +// certain size to have their "proper" ABI on each architecture. +// Note that they must be kept sorted by vector size. +const X86_FEATURES_FOR_CORRECT_VECTOR_ABI: &'static [(u64, &'static str)] = + &[(128, "sse"), (256, "avx"), (512, "avx512f")]; +const AARCH64_FEATURES_FOR_CORRECT_VECTOR_ABI: &'static [(u64, &'static str)] = &[(128, "neon")]; + impl super::spec::Target { pub fn supported_target_features( &self, @@ -543,6 +550,16 @@ impl super::spec::Target { } } + // Returns None if we do not support ABI checks on the given target yet. + pub fn features_for_correct_vector_abi(&self) -> Option<&'static [(u64, &'static str)]> { + match &*self.arch { + "x86" | "x86_64" => Some(X86_FEATURES_FOR_CORRECT_VECTOR_ABI), + "aarch64" => Some(AARCH64_FEATURES_FOR_CORRECT_VECTOR_ABI), + // FIXME: add support for non-tier1 architectures + _ => None, + } + } + pub fn tied_target_features(&self) -> &'static [&'static [&'static str]] { match &*self.arch { "aarch64" | "arm64ec" => AARCH64_TIED_FEATURES, diff --git a/tests/crashes/131342-2.rs b/tests/crashes/131342-2.rs deleted file mode 100644 index 79b6a837a49fb..0000000000000 --- a/tests/crashes/131342-2.rs +++ /dev/null @@ -1,40 +0,0 @@ -//@ known-bug: #131342 -// see also: 131342.rs - -fn main() { - problem_thingy(Once); -} - -struct Once; - -impl Iterator for Once { - type Item = (); -} - -fn problem_thingy(items: impl Iterator) { - let peeker = items.peekable(); - problem_thingy(&peeker); -} - -trait Iterator { - type Item; - - fn peekable(self) -> Peekable - where - Self: Sized, - { - loop {} - } -} - -struct Peekable { - _peeked: I::Item, -} - -impl Iterator for Peekable { - type Item = I::Item; -} - -impl Iterator for &I { - type Item = I::Item; -} diff --git a/tests/crashes/131342.rs b/tests/crashes/131342.rs index 7f7ee9c9ac110..266aa0da97d12 100644 --- a/tests/crashes/131342.rs +++ b/tests/crashes/131342.rs @@ -1,5 +1,4 @@ //@ known-bug: #131342 -// see also: 131342-2.rs fn main() { let mut items = vec![1, 2, 3, 4, 5].into_iter(); diff --git a/tests/ui/layout/post-mono-layout-cycle-2.rs b/tests/ui/layout/post-mono-layout-cycle-2.rs index 356f1e777c7d0..e9a5292fbbdfb 100644 --- a/tests/ui/layout/post-mono-layout-cycle-2.rs +++ b/tests/ui/layout/post-mono-layout-cycle-2.rs @@ -45,7 +45,6 @@ where T: Blah, { async fn ice(&mut self) { - //~^ ERROR a cycle occurred during layout computation let arr: [(); 0] = []; self.t.iter(arr.into_iter()).await; } diff --git a/tests/ui/layout/post-mono-layout-cycle-2.stderr b/tests/ui/layout/post-mono-layout-cycle-2.stderr index ad01c2694faf5..ea69b39706f48 100644 --- a/tests/ui/layout/post-mono-layout-cycle-2.stderr +++ b/tests/ui/layout/post-mono-layout-cycle-2.stderr @@ -12,12 +12,12 @@ LL | Blah::iter(self, iterator).await | = note: a recursive `async fn` call must introduce indirection such as `Box::pin` to avoid an infinitely sized future -error: a cycle occurred during layout computation - --> $DIR/post-mono-layout-cycle-2.rs:47:5 +note: the above error was encountered while instantiating `fn main::{closure#0}` + --> $DIR/post-mono-layout-cycle-2.rs:16:15 | -LL | async fn ice(&mut self) { - | ^^^^^^^^^^^^^^^^^^^^^^^ +LL | match fut.as_mut().poll(ctx) { + | ^^^^^^^^^^^^^^^^^^^^^^ -error: aborting due to 2 previous errors +error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0733`. diff --git a/tests/ui/layout/post-mono-layout-cycle.rs b/tests/ui/layout/post-mono-layout-cycle.rs index 8d136190c0052..6753c01267ecd 100644 --- a/tests/ui/layout/post-mono-layout-cycle.rs +++ b/tests/ui/layout/post-mono-layout-cycle.rs @@ -14,7 +14,6 @@ struct Wrapper { } fn abi(_: Option>) {} -//~^ ERROR a cycle occurred during layout computation fn indirect() { abi::(None); diff --git a/tests/ui/layout/post-mono-layout-cycle.stderr b/tests/ui/layout/post-mono-layout-cycle.stderr index 47f7f30b1cb4c..e2f6ac595d006 100644 --- a/tests/ui/layout/post-mono-layout-cycle.stderr +++ b/tests/ui/layout/post-mono-layout-cycle.stderr @@ -5,12 +5,12 @@ error[E0391]: cycle detected when computing layout of `Wrapper<()>` = note: cycle used when computing layout of `core::option::Option>` = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information -error: a cycle occurred during layout computation - --> $DIR/post-mono-layout-cycle.rs:16:1 +note: the above error was encountered while instantiating `fn indirect::<()>` + --> $DIR/post-mono-layout-cycle.rs:23:5 | -LL | fn abi(_: Option>) {} - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +LL | indirect::<()>(); + | ^^^^^^^^^^^^^^^^ -error: aborting due to 2 previous errors +error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0391`. diff --git a/tests/ui/simd-abi-checks.rs b/tests/ui/simd-abi-checks.rs new file mode 100644 index 0000000000000..094c89930b752 --- /dev/null +++ b/tests/ui/simd-abi-checks.rs @@ -0,0 +1,81 @@ +//@ only-x86_64 +//@ build-pass +//@ ignore-pass (test emits codegen-time warnings) + +#![feature(avx512_target_feature)] +#![feature(portable_simd)] +#![allow(improper_ctypes_definitions)] + +use std::arch::x86_64::*; + +#[repr(transparent)] +struct Wrapper(__m256); + +unsafe extern "C" fn w(_: Wrapper) { + //~^ ABI error: this function definition uses a vector type that requires the `avx` target feature, which is not enabled + //~| WARNING this was previously accepted by the compiler + todo!() +} + +unsafe extern "C" fn f(_: __m256) { + //~^ ABI error: this function definition uses a vector type that requires the `avx` target feature, which is not enabled + //~| WARNING this was previously accepted by the compiler + todo!() +} + +unsafe extern "C" fn g() -> __m256 { + //~^ ABI error: this function definition uses a vector type that requires the `avx` target feature, which is not enabled + //~| WARNING this was previously accepted by the compiler + todo!() +} + +#[target_feature(enable = "avx")] +unsafe extern "C" fn favx() -> __m256 { + todo!() +} + +// avx2 implies avx, so no error here. +#[target_feature(enable = "avx2")] +unsafe extern "C" fn gavx(_: __m256) { + todo!() +} + +// No error because of "Rust" ABI. +fn as_f64x8(d: __m512d) -> std::simd::f64x8 { + unsafe { std::mem::transmute(d) } +} + +unsafe fn test() { + let arg = std::mem::transmute([0.0f64; 8]); + as_f64x8(arg); +} + +fn main() { + unsafe { + f(g()); + //~^ WARNING ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + //~| WARNING ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + //~| WARNING this was previously accepted by the compiler + //~| WARNING this was previously accepted by the compiler + } + + unsafe { + gavx(favx()); + //~^ WARNING ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + //~| WARNING ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + //~| WARNING this was previously accepted by the compiler + //~| WARNING this was previously accepted by the compiler + } + + unsafe { + test(); + } + + unsafe { + w(Wrapper(g())); + //~^ WARNING ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + //~| WARNING ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + //~| WARNING this was previously accepted by the compiler + //~| WARNING this was previously accepted by the compiler + } +} diff --git a/tests/ui/simd-abi-checks.stderr b/tests/ui/simd-abi-checks.stderr new file mode 100644 index 0000000000000..aa7e940016981 --- /dev/null +++ b/tests/ui/simd-abi-checks.stderr @@ -0,0 +1,93 @@ +warning: ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + --> $DIR/simd-abi-checks.rs:55:11 + | +LL | f(g()); + | ^^^ function called here + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #116558 + = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`) + = note: `#[warn(abi_unsupported_vector_types)]` on by default + +warning: ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + --> $DIR/simd-abi-checks.rs:55:9 + | +LL | f(g()); + | ^^^^^^ function called here + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #116558 + = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`) + +warning: ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + --> $DIR/simd-abi-checks.rs:63:14 + | +LL | gavx(favx()); + | ^^^^^^ function called here + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #116558 + = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`) + +warning: ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + --> $DIR/simd-abi-checks.rs:63:9 + | +LL | gavx(favx()); + | ^^^^^^^^^^^^ function called here + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #116558 + = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`) + +warning: ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + --> $DIR/simd-abi-checks.rs:75:19 + | +LL | w(Wrapper(g())); + | ^^^ function called here + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #116558 + = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`) + +warning: ABI error: this function call uses a vector type that requires the `avx` target feature, which is not enabled in the caller + --> $DIR/simd-abi-checks.rs:75:9 + | +LL | w(Wrapper(g())); + | ^^^^^^^^^^^^^^^ function called here + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #116558 + = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`) + +warning: ABI error: this function definition uses a vector type that requires the `avx` target feature, which is not enabled + --> $DIR/simd-abi-checks.rs:26:1 + | +LL | unsafe extern "C" fn g() -> __m256 { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function defined here + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #116558 + = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`) + +warning: ABI error: this function definition uses a vector type that requires the `avx` target feature, which is not enabled + --> $DIR/simd-abi-checks.rs:20:1 + | +LL | unsafe extern "C" fn f(_: __m256) { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function defined here + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #116558 + = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`) + +warning: ABI error: this function definition uses a vector type that requires the `avx` target feature, which is not enabled + --> $DIR/simd-abi-checks.rs:14:1 + | +LL | unsafe extern "C" fn w(_: Wrapper) { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function defined here + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #116558 + = help: consider enabling it globally (`-C target-feature=+avx`) or locally (`#[target_feature(enable="avx")]`) + +warning: 9 warnings emitted + diff --git a/tests/ui/sse-abi-checks.rs b/tests/ui/sse-abi-checks.rs new file mode 100644 index 0000000000000..d2afd38fcc85f --- /dev/null +++ b/tests/ui/sse-abi-checks.rs @@ -0,0 +1,24 @@ +//! Ensure we trigger abi_unsupported_vector_types for target features that are usually enabled +//! on a target, but disabled in this file via a `-C` flag. +//@ compile-flags: --crate-type=rlib --target=i686-unknown-linux-gnu -C target-feature=-sse,-sse2 +//@ build-pass +//@ ignore-pass (test emits codegen-time warnings) +//@ needs-llvm-components: x86 +#![feature(no_core, lang_items, repr_simd)] +#![no_core] +#![allow(improper_ctypes_definitions)] + +#[lang = "sized"] +trait Sized {} + +#[lang = "copy"] +trait Copy {} + +#[repr(simd)] +pub struct SseVector([i64; 2]); + +#[no_mangle] +pub unsafe extern "C" fn f(_: SseVector) { + //~^ ABI error: this function definition uses a vector type that requires the `sse` target feature, which is not enabled + //~| WARNING this was previously accepted by the compiler +} diff --git a/tests/ui/sse-abi-checks.stderr b/tests/ui/sse-abi-checks.stderr new file mode 100644 index 0000000000000..77c4e1fc07ab4 --- /dev/null +++ b/tests/ui/sse-abi-checks.stderr @@ -0,0 +1,13 @@ +warning: ABI error: this function definition uses a vector type that requires the `sse` target feature, which is not enabled + --> $DIR/sse-abi-checks.rs:21:1 + | +LL | pub unsafe extern "C" fn f(_: SseVector) { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ function defined here + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #116558 + = help: consider enabling it globally (`-C target-feature=+sse`) or locally (`#[target_feature(enable="sse")]`) + = note: `#[warn(abi_unsupported_vector_types)]` on by default + +warning: 1 warning emitted +