| //! Type-checking for the rust-intrinsic and platform-intrinsic |
| //! intrinsics that the compiler exposes. |
| |
| use crate::errors::{ |
| UnrecognizedAtomicOperation, UnrecognizedIntrinsicFunction, |
| WrongNumberOfGenericArgumentsToIntrinsic, |
| }; |
| use crate::require_same_types; |
| |
| use hir::def_id::DefId; |
| use rustc_errors::{struct_span_err, DiagnosticMessage}; |
| use rustc_hir as hir; |
| use rustc_middle::traits::{ObligationCause, ObligationCauseCode}; |
| use rustc_middle::ty::{self, TyCtxt}; |
| use rustc_span::symbol::{kw, sym, Symbol}; |
| use rustc_target::spec::abi::Abi; |
| |
| use std::iter; |
| |
| fn equate_intrinsic_type<'tcx>( |
| tcx: TyCtxt<'tcx>, |
| it: &hir::ForeignItem<'_>, |
| n_tps: usize, |
| n_lts: usize, |
| sig: ty::PolyFnSig<'tcx>, |
| ) { |
| let (own_counts, span) = match &it.kind { |
| hir::ForeignItemKind::Fn(.., generics) => { |
| let own_counts = tcx.generics_of(it.owner_id.to_def_id()).own_counts(); |
| (own_counts, generics.span) |
| } |
| _ => { |
| struct_span_err!(tcx.sess, it.span, E0622, "intrinsic must be a function") |
| .span_label(it.span, "expected a function") |
| .emit(); |
| return; |
| } |
| }; |
| |
| let gen_count_ok = |found: usize, expected: usize, descr: &str| -> bool { |
| if found != expected { |
| tcx.sess.emit_err(WrongNumberOfGenericArgumentsToIntrinsic { |
| span, |
| found, |
| expected, |
| descr, |
| }); |
| false |
| } else { |
| true |
| } |
| }; |
| |
| if gen_count_ok(own_counts.lifetimes, n_lts, "lifetime") |
| && gen_count_ok(own_counts.types, n_tps, "type") |
| && gen_count_ok(own_counts.consts, 0, "const") |
| { |
| let fty = tcx.mk_fn_ptr(sig); |
| let cause = ObligationCause::new(it.span, it.hir_id(), ObligationCauseCode::IntrinsicType); |
| require_same_types(tcx, &cause, tcx.mk_fn_ptr(tcx.fn_sig(it.owner_id)), fty); |
| } |
| } |
| |
| /// Returns the unsafety of the given intrinsic. |
| pub fn intrinsic_operation_unsafety(tcx: TyCtxt<'_>, intrinsic_id: DefId) -> hir::Unsafety { |
| let has_safe_attr = match tcx.has_attr(intrinsic_id, sym::rustc_safe_intrinsic) { |
| true => hir::Unsafety::Normal, |
| false => hir::Unsafety::Unsafe, |
| }; |
| let is_in_list = match tcx.item_name(intrinsic_id) { |
| // When adding a new intrinsic to this list, |
| // it's usually worth updating that intrinsic's documentation |
| // to note that it's safe to call, since |
| // safe extern fns are otherwise unprecedented. |
| sym::abort |
| | sym::assert_inhabited |
| | sym::assert_zero_valid |
| | sym::assert_uninit_valid |
| | sym::size_of |
| | sym::min_align_of |
| | sym::needs_drop |
| | sym::caller_location |
| | sym::add_with_overflow |
| | sym::sub_with_overflow |
| | sym::mul_with_overflow |
| | sym::wrapping_add |
| | sym::wrapping_sub |
| | sym::wrapping_mul |
| | sym::saturating_add |
| | sym::saturating_sub |
| | sym::rotate_left |
| | sym::rotate_right |
| | sym::ctpop |
| | sym::ctlz |
| | sym::cttz |
| | sym::bswap |
| | sym::bitreverse |
| | sym::discriminant_value |
| | sym::type_id |
| | sym::likely |
| | sym::unlikely |
| | sym::ptr_guaranteed_cmp |
| | sym::minnumf32 |
| | sym::minnumf64 |
| | sym::maxnumf32 |
| | sym::rustc_peek |
| | sym::maxnumf64 |
| | sym::type_name |
| | sym::forget |
| | sym::black_box |
| | sym::variant_count |
| | sym::ptr_mask => hir::Unsafety::Normal, |
| _ => hir::Unsafety::Unsafe, |
| }; |
| |
| if has_safe_attr != is_in_list { |
| tcx.sess.struct_span_err( |
| tcx.def_span(intrinsic_id), |
| DiagnosticMessage::Str(format!( |
| "intrinsic safety mismatch between list of intrinsics within the compiler and core library intrinsics for intrinsic `{}`", |
| tcx.item_name(intrinsic_id) |
| ))).emit(); |
| } |
| |
| is_in_list |
| } |
| |
| /// Remember to add all intrinsics here, in `compiler/rustc_codegen_llvm/src/intrinsic.rs`, |
| /// and in `library/core/src/intrinsics.rs`. |
| pub fn check_intrinsic_type(tcx: TyCtxt<'_>, it: &hir::ForeignItem<'_>) { |
| let param = |n| tcx.mk_ty_param(n, Symbol::intern(&format!("P{}", n))); |
| let intrinsic_id = it.owner_id.to_def_id(); |
| let intrinsic_name = tcx.item_name(intrinsic_id); |
| let name_str = intrinsic_name.as_str(); |
| |
| let bound_vars = tcx.mk_bound_variable_kinds( |
| [ty::BoundVariableKind::Region(ty::BrAnon(0)), ty::BoundVariableKind::Region(ty::BrEnv)] |
| .iter() |
| .copied(), |
| ); |
| let mk_va_list_ty = |mutbl| { |
| tcx.lang_items().va_list().map(|did| { |
| let region = tcx.mk_region(ty::ReLateBound( |
| ty::INNERMOST, |
| ty::BoundRegion { var: ty::BoundVar::from_u32(0), kind: ty::BrAnon(0) }, |
| )); |
| let env_region = tcx.mk_region(ty::ReLateBound( |
| ty::INNERMOST, |
| ty::BoundRegion { var: ty::BoundVar::from_u32(1), kind: ty::BrEnv }, |
| )); |
| let va_list_ty = tcx.bound_type_of(did).subst(tcx, &[region.into()]); |
| (tcx.mk_ref(env_region, ty::TypeAndMut { ty: va_list_ty, mutbl }), va_list_ty) |
| }) |
| }; |
| |
| let (n_tps, n_lts, inputs, output, unsafety) = if name_str.starts_with("atomic_") { |
| let split: Vec<&str> = name_str.split('_').collect(); |
| assert!(split.len() >= 2, "Atomic intrinsic in an incorrect format"); |
| |
| //We only care about the operation here |
| let (n_tps, inputs, output) = match split[1] { |
| "cxchg" | "cxchgweak" => ( |
| 1, |
| vec![tcx.mk_mut_ptr(param(0)), param(0), param(0)], |
| tcx.intern_tup(&[param(0), tcx.types.bool]), |
| ), |
| "load" => (1, vec![tcx.mk_imm_ptr(param(0))], param(0)), |
| "store" => (1, vec![tcx.mk_mut_ptr(param(0)), param(0)], tcx.mk_unit()), |
| |
| "xchg" | "xadd" | "xsub" | "and" | "nand" | "or" | "xor" | "max" | "min" | "umax" |
| | "umin" => (1, vec![tcx.mk_mut_ptr(param(0)), param(0)], param(0)), |
| "fence" | "singlethreadfence" => (0, Vec::new(), tcx.mk_unit()), |
| op => { |
| tcx.sess.emit_err(UnrecognizedAtomicOperation { span: it.span, op }); |
| return; |
| } |
| }; |
| (n_tps, 0, inputs, output, hir::Unsafety::Unsafe) |
| } else { |
| let unsafety = intrinsic_operation_unsafety(tcx, intrinsic_id); |
| let (n_tps, inputs, output) = match intrinsic_name { |
| sym::abort => (0, Vec::new(), tcx.types.never), |
| sym::unreachable => (0, Vec::new(), tcx.types.never), |
| sym::breakpoint => (0, Vec::new(), tcx.mk_unit()), |
| sym::size_of | sym::pref_align_of | sym::min_align_of | sym::variant_count => { |
| (1, Vec::new(), tcx.types.usize) |
| } |
| sym::size_of_val | sym::min_align_of_val => { |
| (1, vec![tcx.mk_imm_ptr(param(0))], tcx.types.usize) |
| } |
| sym::rustc_peek => (1, vec![param(0)], param(0)), |
| sym::caller_location => (0, vec![], tcx.caller_location_ty()), |
| sym::assert_inhabited | sym::assert_zero_valid | sym::assert_uninit_valid => { |
| (1, Vec::new(), tcx.mk_unit()) |
| } |
| sym::forget => (1, vec![param(0)], tcx.mk_unit()), |
| sym::transmute => (2, vec![param(0)], param(1)), |
| sym::prefetch_read_data |
| | sym::prefetch_write_data |
| | sym::prefetch_read_instruction |
| | sym::prefetch_write_instruction => ( |
| 1, |
| vec![ |
| tcx.mk_ptr(ty::TypeAndMut { ty: param(0), mutbl: hir::Mutability::Not }), |
| tcx.types.i32, |
| ], |
| tcx.mk_unit(), |
| ), |
| sym::drop_in_place => (1, vec![tcx.mk_mut_ptr(param(0))], tcx.mk_unit()), |
| sym::needs_drop => (1, Vec::new(), tcx.types.bool), |
| |
| sym::type_name => (1, Vec::new(), tcx.mk_static_str()), |
| sym::type_id => (1, Vec::new(), tcx.types.u64), |
| sym::offset | sym::arith_offset => ( |
| 1, |
| vec![ |
| tcx.mk_ptr(ty::TypeAndMut { ty: param(0), mutbl: hir::Mutability::Not }), |
| tcx.types.isize, |
| ], |
| tcx.mk_ptr(ty::TypeAndMut { ty: param(0), mutbl: hir::Mutability::Not }), |
| ), |
| sym::ptr_mask => ( |
| 1, |
| vec![ |
| tcx.mk_ptr(ty::TypeAndMut { ty: param(0), mutbl: hir::Mutability::Not }), |
| tcx.types.usize, |
| ], |
| tcx.mk_ptr(ty::TypeAndMut { ty: param(0), mutbl: hir::Mutability::Not }), |
| ), |
| |
| sym::copy | sym::copy_nonoverlapping => ( |
| 1, |
| vec![ |
| tcx.mk_ptr(ty::TypeAndMut { ty: param(0), mutbl: hir::Mutability::Not }), |
| tcx.mk_ptr(ty::TypeAndMut { ty: param(0), mutbl: hir::Mutability::Mut }), |
| tcx.types.usize, |
| ], |
| tcx.mk_unit(), |
| ), |
| sym::volatile_copy_memory | sym::volatile_copy_nonoverlapping_memory => ( |
| 1, |
| vec![ |
| tcx.mk_ptr(ty::TypeAndMut { ty: param(0), mutbl: hir::Mutability::Mut }), |
| tcx.mk_ptr(ty::TypeAndMut { ty: param(0), mutbl: hir::Mutability::Not }), |
| tcx.types.usize, |
| ], |
| tcx.mk_unit(), |
| ), |
| sym::write_bytes | sym::volatile_set_memory => ( |
| 1, |
| vec![ |
| tcx.mk_ptr(ty::TypeAndMut { ty: param(0), mutbl: hir::Mutability::Mut }), |
| tcx.types.u8, |
| tcx.types.usize, |
| ], |
| tcx.mk_unit(), |
| ), |
| sym::sqrtf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::sqrtf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::powif32 => (0, vec![tcx.types.f32, tcx.types.i32], tcx.types.f32), |
| sym::powif64 => (0, vec![tcx.types.f64, tcx.types.i32], tcx.types.f64), |
| sym::sinf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::sinf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::cosf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::cosf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::powf32 => (0, vec![tcx.types.f32, tcx.types.f32], tcx.types.f32), |
| sym::powf64 => (0, vec![tcx.types.f64, tcx.types.f64], tcx.types.f64), |
| sym::expf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::expf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::exp2f32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::exp2f64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::logf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::logf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::log10f32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::log10f64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::log2f32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::log2f64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::fmaf32 => (0, vec![tcx.types.f32, tcx.types.f32, tcx.types.f32], tcx.types.f32), |
| sym::fmaf64 => (0, vec![tcx.types.f64, tcx.types.f64, tcx.types.f64], tcx.types.f64), |
| sym::fabsf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::fabsf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::minnumf32 => (0, vec![tcx.types.f32, tcx.types.f32], tcx.types.f32), |
| sym::minnumf64 => (0, vec![tcx.types.f64, tcx.types.f64], tcx.types.f64), |
| sym::maxnumf32 => (0, vec![tcx.types.f32, tcx.types.f32], tcx.types.f32), |
| sym::maxnumf64 => (0, vec![tcx.types.f64, tcx.types.f64], tcx.types.f64), |
| sym::copysignf32 => (0, vec![tcx.types.f32, tcx.types.f32], tcx.types.f32), |
| sym::copysignf64 => (0, vec![tcx.types.f64, tcx.types.f64], tcx.types.f64), |
| sym::floorf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::floorf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::ceilf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::ceilf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::truncf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::truncf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::rintf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::rintf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::nearbyintf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::nearbyintf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| sym::roundf32 => (0, vec![tcx.types.f32], tcx.types.f32), |
| sym::roundf64 => (0, vec![tcx.types.f64], tcx.types.f64), |
| |
| sym::volatile_load | sym::unaligned_volatile_load => { |
| (1, vec![tcx.mk_imm_ptr(param(0))], param(0)) |
| } |
| sym::volatile_store | sym::unaligned_volatile_store => { |
| (1, vec![tcx.mk_mut_ptr(param(0)), param(0)], tcx.mk_unit()) |
| } |
| |
| sym::ctpop |
| | sym::ctlz |
| | sym::ctlz_nonzero |
| | sym::cttz |
| | sym::cttz_nonzero |
| | sym::bswap |
| | sym::bitreverse => (1, vec![param(0)], param(0)), |
| |
| sym::add_with_overflow | sym::sub_with_overflow | sym::mul_with_overflow => { |
| (1, vec![param(0), param(0)], tcx.intern_tup(&[param(0), tcx.types.bool])) |
| } |
| |
| sym::ptr_guaranteed_cmp => { |
| (1, vec![tcx.mk_imm_ptr(param(0)), tcx.mk_imm_ptr(param(0))], tcx.types.u8) |
| } |
| |
| sym::const_allocate => { |
| (0, vec![tcx.types.usize, tcx.types.usize], tcx.mk_mut_ptr(tcx.types.u8)) |
| } |
| sym::const_deallocate => ( |
| 0, |
| vec![tcx.mk_mut_ptr(tcx.types.u8), tcx.types.usize, tcx.types.usize], |
| tcx.mk_unit(), |
| ), |
| |
| sym::ptr_offset_from => { |
| (1, vec![tcx.mk_imm_ptr(param(0)), tcx.mk_imm_ptr(param(0))], tcx.types.isize) |
| } |
| sym::ptr_offset_from_unsigned => { |
| (1, vec![tcx.mk_imm_ptr(param(0)), tcx.mk_imm_ptr(param(0))], tcx.types.usize) |
| } |
| sym::unchecked_div | sym::unchecked_rem | sym::exact_div => { |
| (1, vec![param(0), param(0)], param(0)) |
| } |
| sym::unchecked_shl | sym::unchecked_shr | sym::rotate_left | sym::rotate_right => { |
| (1, vec![param(0), param(0)], param(0)) |
| } |
| sym::unchecked_add | sym::unchecked_sub | sym::unchecked_mul => { |
| (1, vec![param(0), param(0)], param(0)) |
| } |
| sym::wrapping_add | sym::wrapping_sub | sym::wrapping_mul => { |
| (1, vec![param(0), param(0)], param(0)) |
| } |
| sym::saturating_add | sym::saturating_sub => (1, vec![param(0), param(0)], param(0)), |
| sym::fadd_fast | sym::fsub_fast | sym::fmul_fast | sym::fdiv_fast | sym::frem_fast => { |
| (1, vec![param(0), param(0)], param(0)) |
| } |
| sym::float_to_int_unchecked => (2, vec![param(0)], param(1)), |
| |
| sym::assume => (0, vec![tcx.types.bool], tcx.mk_unit()), |
| sym::likely => (0, vec![tcx.types.bool], tcx.types.bool), |
| sym::unlikely => (0, vec![tcx.types.bool], tcx.types.bool), |
| |
| sym::discriminant_value => { |
| let assoc_items = tcx.associated_item_def_ids( |
| tcx.require_lang_item(hir::LangItem::DiscriminantKind, None), |
| ); |
| let discriminant_def_id = assoc_items[0]; |
| |
| let br = ty::BoundRegion { var: ty::BoundVar::from_u32(0), kind: ty::BrAnon(0) }; |
| ( |
| 1, |
| vec![ |
| tcx.mk_imm_ref(tcx.mk_region(ty::ReLateBound(ty::INNERMOST, br)), param(0)), |
| ], |
| tcx.mk_projection(discriminant_def_id, tcx.mk_substs([param(0).into()].iter())), |
| ) |
| } |
| |
| kw::Try => { |
| let mut_u8 = tcx.mk_mut_ptr(tcx.types.u8); |
| let try_fn_ty = ty::Binder::dummy(tcx.mk_fn_sig( |
| iter::once(mut_u8), |
| tcx.mk_unit(), |
| false, |
| hir::Unsafety::Normal, |
| Abi::Rust, |
| )); |
| let catch_fn_ty = ty::Binder::dummy(tcx.mk_fn_sig( |
| [mut_u8, mut_u8].iter().cloned(), |
| tcx.mk_unit(), |
| false, |
| hir::Unsafety::Normal, |
| Abi::Rust, |
| )); |
| ( |
| 0, |
| vec![tcx.mk_fn_ptr(try_fn_ty), mut_u8, tcx.mk_fn_ptr(catch_fn_ty)], |
| tcx.types.i32, |
| ) |
| } |
| |
| sym::va_start | sym::va_end => match mk_va_list_ty(hir::Mutability::Mut) { |
| Some((va_list_ref_ty, _)) => (0, vec![va_list_ref_ty], tcx.mk_unit()), |
| None => bug!("`va_list` language item needed for C-variadic intrinsics"), |
| }, |
| |
| sym::va_copy => match mk_va_list_ty(hir::Mutability::Not) { |
| Some((va_list_ref_ty, va_list_ty)) => { |
| let va_list_ptr_ty = tcx.mk_mut_ptr(va_list_ty); |
| (0, vec![va_list_ptr_ty, va_list_ref_ty], tcx.mk_unit()) |
| } |
| None => bug!("`va_list` language item needed for C-variadic intrinsics"), |
| }, |
| |
| sym::va_arg => match mk_va_list_ty(hir::Mutability::Mut) { |
| Some((va_list_ref_ty, _)) => (1, vec![va_list_ref_ty], param(0)), |
| None => bug!("`va_list` language item needed for C-variadic intrinsics"), |
| }, |
| |
| sym::nontemporal_store => (1, vec![tcx.mk_mut_ptr(param(0)), param(0)], tcx.mk_unit()), |
| |
| sym::raw_eq => { |
| let br = ty::BoundRegion { var: ty::BoundVar::from_u32(0), kind: ty::BrAnon(0) }; |
| let param_ty = |
| tcx.mk_imm_ref(tcx.mk_region(ty::ReLateBound(ty::INNERMOST, br)), param(0)); |
| (1, vec![param_ty; 2], tcx.types.bool) |
| } |
| |
| sym::black_box => (1, vec![param(0)], param(0)), |
| |
| sym::const_eval_select => (4, vec![param(0), param(1), param(2)], param(3)), |
| |
| sym::vtable_size | sym::vtable_align => { |
| (0, vec![tcx.mk_imm_ptr(tcx.mk_unit())], tcx.types.usize) |
| } |
| |
| other => { |
| tcx.sess.emit_err(UnrecognizedIntrinsicFunction { span: it.span, name: other }); |
| return; |
| } |
| }; |
| (n_tps, 0, inputs, output, unsafety) |
| }; |
| let sig = tcx.mk_fn_sig(inputs.into_iter(), output, false, unsafety, Abi::RustIntrinsic); |
| let sig = ty::Binder::bind_with_vars(sig, bound_vars); |
| equate_intrinsic_type(tcx, it, n_tps, n_lts, sig) |
| } |
| |
| /// Type-check `extern "platform-intrinsic" { ... }` functions. |
| pub fn check_platform_intrinsic_type(tcx: TyCtxt<'_>, it: &hir::ForeignItem<'_>) { |
| let param = |n| { |
| let name = Symbol::intern(&format!("P{}", n)); |
| tcx.mk_ty_param(n, name) |
| }; |
| |
| let name = it.ident.name; |
| |
| let (n_tps, inputs, output) = match name { |
| sym::simd_eq | sym::simd_ne | sym::simd_lt | sym::simd_le | sym::simd_gt | sym::simd_ge => { |
| (2, vec![param(0), param(0)], param(1)) |
| } |
| sym::simd_add |
| | sym::simd_sub |
| | sym::simd_mul |
| | sym::simd_rem |
| | sym::simd_div |
| | sym::simd_shl |
| | sym::simd_shr |
| | sym::simd_and |
| | sym::simd_or |
| | sym::simd_xor |
| | sym::simd_fmin |
| | sym::simd_fmax |
| | sym::simd_fpow |
| | sym::simd_saturating_add |
| | sym::simd_saturating_sub => (1, vec![param(0), param(0)], param(0)), |
| sym::simd_arith_offset => (2, vec![param(0), param(1)], param(0)), |
| sym::simd_neg |
| | sym::simd_fsqrt |
| | sym::simd_fsin |
| | sym::simd_fcos |
| | sym::simd_fexp |
| | sym::simd_fexp2 |
| | sym::simd_flog2 |
| | sym::simd_flog10 |
| | sym::simd_flog |
| | sym::simd_fabs |
| | sym::simd_ceil |
| | sym::simd_floor |
| | sym::simd_round |
| | sym::simd_trunc => (1, vec![param(0)], param(0)), |
| sym::simd_fpowi => (1, vec![param(0), tcx.types.i32], param(0)), |
| sym::simd_fma => (1, vec![param(0), param(0), param(0)], param(0)), |
| sym::simd_gather => (3, vec![param(0), param(1), param(2)], param(0)), |
| sym::simd_scatter => (3, vec![param(0), param(1), param(2)], tcx.mk_unit()), |
| sym::simd_insert => (2, vec![param(0), tcx.types.u32, param(1)], param(0)), |
| sym::simd_extract => (2, vec![param(0), tcx.types.u32], param(1)), |
| sym::simd_cast |
| | sym::simd_as |
| | sym::simd_cast_ptr |
| | sym::simd_expose_addr |
| | sym::simd_from_exposed_addr => (2, vec![param(0)], param(1)), |
| sym::simd_bitmask => (2, vec![param(0)], param(1)), |
| sym::simd_select | sym::simd_select_bitmask => { |
| (2, vec![param(0), param(1), param(1)], param(1)) |
| } |
| sym::simd_reduce_all | sym::simd_reduce_any => (1, vec![param(0)], tcx.types.bool), |
| sym::simd_reduce_add_ordered | sym::simd_reduce_mul_ordered => { |
| (2, vec![param(0), param(1)], param(1)) |
| } |
| sym::simd_reduce_add_unordered |
| | sym::simd_reduce_mul_unordered |
| | sym::simd_reduce_and |
| | sym::simd_reduce_or |
| | sym::simd_reduce_xor |
| | sym::simd_reduce_min |
| | sym::simd_reduce_max |
| | sym::simd_reduce_min_nanless |
| | sym::simd_reduce_max_nanless => (2, vec![param(0)], param(1)), |
| sym::simd_shuffle => (3, vec![param(0), param(0), param(1)], param(2)), |
| name if name.as_str().starts_with("simd_shuffle") => { |
| match name.as_str()["simd_shuffle".len()..].parse() { |
| Ok(n) => { |
| let params = vec![param(0), param(0), tcx.mk_array(tcx.types.u32, n)]; |
| (2, params, param(1)) |
| } |
| Err(_) => { |
| let msg = |
| format!("unrecognized platform-specific intrinsic function: `{name}`"); |
| tcx.sess.struct_span_err(it.span, &msg).emit(); |
| return; |
| } |
| } |
| } |
| _ => { |
| let msg = format!("unrecognized platform-specific intrinsic function: `{name}`"); |
| tcx.sess.struct_span_err(it.span, &msg).emit(); |
| return; |
| } |
| }; |
| |
| let sig = tcx.mk_fn_sig( |
| inputs.into_iter(), |
| output, |
| false, |
| hir::Unsafety::Unsafe, |
| Abi::PlatformIntrinsic, |
| ); |
| let sig = ty::Binder::dummy(sig); |
| equate_intrinsic_type(tcx, it, n_tps, 0, sig) |
| } |
