| //! Type-checking for the rust-intrinsic and platform-intrinsic |
| //! intrinsics that the compiler exposes. |
| |
| use intrinsics; |
| use rustc::traits::{ObligationCause, ObligationCauseCode}; |
| use rustc::ty::{self, TyCtxt, Ty}; |
| use rustc::ty::subst::Subst; |
| use rustc::util::nodemap::FxHashMap; |
| use require_same_types; |
| |
| use rustc_target::spec::abi::Abi; |
| use syntax::ast; |
| use syntax::symbol::Symbol; |
| use syntax_pos::Span; |
| |
| use rustc::hir; |
| |
| use std::iter; |
| |
| fn equate_intrinsic_type<'a, 'tcx>( |
| tcx: TyCtxt<'a, 'tcx, 'tcx>, |
| it: &hir::ForeignItem, |
| n_tps: usize, |
| abi: Abi, |
| safety: hir::Unsafety, |
| inputs: Vec<Ty<'tcx>>, |
| output: Ty<'tcx>, |
| ) { |
| let def_id = tcx.hir().local_def_id(it.id); |
| |
| match it.node { |
| hir::ForeignItemKind::Fn(..) => {} |
| _ => { |
| struct_span_err!(tcx.sess, it.span, E0622, |
| "intrinsic must be a function") |
| .span_label(it.span, "expected a function") |
| .emit(); |
| return; |
| } |
| } |
| |
| let i_n_tps = tcx.generics_of(def_id).own_counts().types; |
| if i_n_tps != n_tps { |
| let span = match it.node { |
| hir::ForeignItemKind::Fn(_, _, ref generics) => generics.span, |
| _ => bug!() |
| }; |
| |
| struct_span_err!(tcx.sess, span, E0094, |
| "intrinsic has wrong number of type \ |
| parameters: found {}, expected {}", |
| i_n_tps, n_tps) |
| .span_label(span, format!("expected {} type parameter", n_tps)) |
| .emit(); |
| return; |
| } |
| |
| let fty = tcx.mk_fn_ptr(ty::Binder::bind(tcx.mk_fn_sig( |
| inputs.into_iter(), |
| output, |
| false, |
| safety, |
| abi |
| ))); |
| let cause = ObligationCause::new(it.span, it.id, ObligationCauseCode::IntrinsicType); |
| require_same_types(tcx, &cause, tcx.mk_fn_ptr(tcx.fn_sig(def_id)), fty); |
| } |
| |
| /// Returns whether the given intrinsic is unsafe to call or not. |
| pub fn intrisic_operation_unsafety(intrinsic: &str) -> hir::Unsafety { |
| match intrinsic { |
| "size_of" | "min_align_of" | "needs_drop" | |
| "add_with_overflow" | "sub_with_overflow" | "mul_with_overflow" | |
| "overflowing_add" | "overflowing_sub" | "overflowing_mul" | |
| "rotate_left" | "rotate_right" | |
| "ctpop" | "ctlz" | "cttz" | "bswap" | "bitreverse" |
| => hir::Unsafety::Normal, |
| _ => hir::Unsafety::Unsafe, |
| } |
| } |
| |
| /// Remember to add all intrinsics here, in librustc_codegen_llvm/intrinsic.rs, |
| /// and in libcore/intrinsics.rs |
| pub fn check_intrinsic_type<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, |
| it: &hir::ForeignItem) { |
| let param = |n| tcx.mk_ty_param(n, Symbol::intern(&format!("P{}", n)).as_interned_str()); |
| let name = it.ident.as_str(); |
| |
| let mk_va_list_ty = || { |
| tcx.lang_items().va_list().map(|did| { |
| let region = tcx.mk_region(ty::ReLateBound(ty::INNERMOST, ty::BrAnon(0))); |
| let env_region = ty::ReLateBound(ty::INNERMOST, ty::BrEnv); |
| let va_list_ty = tcx.type_of(did).subst(tcx, &[region.into()]); |
| tcx.mk_mut_ref(tcx.mk_region(env_region), va_list_ty) |
| }) |
| }; |
| |
| let (n_tps, inputs, output, unsafety) = if name.starts_with("atomic_") { |
| let split : Vec<&str> = name.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 => { |
| struct_span_err!(tcx.sess, it.span, E0092, |
| "unrecognized atomic operation function: `{}`", op) |
| .span_label(it.span, "unrecognized atomic operation") |
| .emit(); |
| return; |
| } |
| }; |
| (n_tps, inputs, output, hir::Unsafety::Unsafe) |
| } else if &name[..] == "abort" || &name[..] == "unreachable" { |
| (0, Vec::new(), tcx.types.never, hir::Unsafety::Unsafe) |
| } else { |
| let unsafety = intrisic_operation_unsafety(&name[..]); |
| let (n_tps, inputs, output) = match &name[..] { |
| "breakpoint" => (0, Vec::new(), tcx.mk_unit()), |
| "size_of" | |
| "pref_align_of" | "min_align_of" => (1, Vec::new(), tcx.types.usize), |
| "size_of_val" | "min_align_of_val" => { |
| (1, vec![ |
| tcx.mk_imm_ref(tcx.mk_region(ty::ReLateBound(ty::INNERMOST, |
| ty::BrAnon(0))), |
| param(0)) |
| ], tcx.types.usize) |
| } |
| "rustc_peek" => (1, vec![param(0)], param(0)), |
| "panic_if_uninhabited" => (1, Vec::new(), tcx.mk_unit()), |
| "init" => (1, Vec::new(), param(0)), |
| "uninit" => (1, Vec::new(), param(0)), |
| "forget" => (1, vec![param(0)], tcx.mk_unit()), |
| "transmute" => (2, vec![ param(0) ], param(1)), |
| "move_val_init" => { |
| (1, |
| vec![ |
| tcx.mk_mut_ptr(param(0)), |
| param(0) |
| ], |
| tcx.mk_unit()) |
| } |
| "prefetch_read_data" | "prefetch_write_data" | |
| "prefetch_read_instruction" | "prefetch_write_instruction" => { |
| (1, vec![tcx.mk_ptr(ty::TypeAndMut { |
| ty: param(0), |
| mutbl: hir::MutImmutable |
| }), tcx.types.i32], |
| tcx.mk_unit()) |
| } |
| "drop_in_place" => { |
| (1, vec![tcx.mk_mut_ptr(param(0))], tcx.mk_unit()) |
| } |
| "needs_drop" => (1, Vec::new(), tcx.types.bool), |
| |
| "type_name" => (1, Vec::new(), tcx.mk_static_str()), |
| "type_id" => (1, Vec::new(), tcx.types.u64), |
| "offset" | "arith_offset" => { |
| (1, |
| vec![ |
| tcx.mk_ptr(ty::TypeAndMut { |
| ty: param(0), |
| mutbl: hir::MutImmutable |
| }), |
| tcx.types.isize |
| ], |
| tcx.mk_ptr(ty::TypeAndMut { |
| ty: param(0), |
| mutbl: hir::MutImmutable |
| })) |
| } |
| "copy" | "copy_nonoverlapping" => { |
| (1, |
| vec![ |
| tcx.mk_ptr(ty::TypeAndMut { |
| ty: param(0), |
| mutbl: hir::MutImmutable |
| }), |
| tcx.mk_ptr(ty::TypeAndMut { |
| ty: param(0), |
| mutbl: hir::MutMutable |
| }), |
| tcx.types.usize, |
| ], |
| tcx.mk_unit()) |
| } |
| "volatile_copy_memory" | "volatile_copy_nonoverlapping_memory" => { |
| (1, |
| vec![ |
| tcx.mk_ptr(ty::TypeAndMut { |
| ty: param(0), |
| mutbl: hir::MutMutable |
| }), |
| tcx.mk_ptr(ty::TypeAndMut { |
| ty: param(0), |
| mutbl: hir::MutImmutable |
| }), |
| tcx.types.usize, |
| ], |
| tcx.mk_unit()) |
| } |
| "write_bytes" | "volatile_set_memory" => { |
| (1, |
| vec![ |
| tcx.mk_ptr(ty::TypeAndMut { |
| ty: param(0), |
| mutbl: hir::MutMutable |
| }), |
| tcx.types.u8, |
| tcx.types.usize, |
| ], |
| tcx.mk_unit()) |
| } |
| "sqrtf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "sqrtf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "powif32" => { |
| (0, |
| vec![ tcx.types.f32, tcx.types.i32 ], |
| tcx.types.f32) |
| } |
| "powif64" => { |
| (0, |
| vec![ tcx.types.f64, tcx.types.i32 ], |
| tcx.types.f64) |
| } |
| "sinf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "sinf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "cosf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "cosf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "powf32" => { |
| (0, |
| vec![ tcx.types.f32, tcx.types.f32 ], |
| tcx.types.f32) |
| } |
| "powf64" => { |
| (0, |
| vec![ tcx.types.f64, tcx.types.f64 ], |
| tcx.types.f64) |
| } |
| "expf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "expf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "exp2f32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "exp2f64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "logf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "logf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "log10f32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "log10f64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "log2f32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "log2f64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "fmaf32" => { |
| (0, |
| vec![ tcx.types.f32, tcx.types.f32, tcx.types.f32 ], |
| tcx.types.f32) |
| } |
| "fmaf64" => { |
| (0, |
| vec![ tcx.types.f64, tcx.types.f64, tcx.types.f64 ], |
| tcx.types.f64) |
| } |
| "fabsf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "fabsf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "copysignf32" => (0, vec![ tcx.types.f32, tcx.types.f32 ], tcx.types.f32), |
| "copysignf64" => (0, vec![ tcx.types.f64, tcx.types.f64 ], tcx.types.f64), |
| "floorf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "floorf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "ceilf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "ceilf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "truncf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "truncf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "rintf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "rintf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "nearbyintf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "nearbyintf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| "roundf32" => (0, vec![ tcx.types.f32 ], tcx.types.f32), |
| "roundf64" => (0, vec![ tcx.types.f64 ], tcx.types.f64), |
| |
| "volatile_load" | "unaligned_volatile_load" => |
| (1, vec![ tcx.mk_imm_ptr(param(0)) ], param(0)), |
| "volatile_store" | "unaligned_volatile_store" => |
| (1, vec![ tcx.mk_mut_ptr(param(0)), param(0) ], tcx.mk_unit()), |
| |
| "ctpop" | "ctlz" | "ctlz_nonzero" | "cttz" | "cttz_nonzero" | |
| "bswap" | "bitreverse" => |
| (1, vec![param(0)], param(0)), |
| |
| "add_with_overflow" | "sub_with_overflow" | "mul_with_overflow" => |
| (1, vec![param(0), param(0)], |
| tcx.intern_tup(&[param(0), tcx.types.bool])), |
| |
| "unchecked_div" | "unchecked_rem" | "exact_div" => |
| (1, vec![param(0), param(0)], param(0)), |
| "unchecked_shl" | "unchecked_shr" | |
| "rotate_left" | "rotate_right" => |
| (1, vec![param(0), param(0)], param(0)), |
| |
| "overflowing_add" | "overflowing_sub" | "overflowing_mul" => |
| (1, vec![param(0), param(0)], param(0)), |
| "fadd_fast" | "fsub_fast" | "fmul_fast" | "fdiv_fast" | "frem_fast" => |
| (1, vec![param(0), param(0)], param(0)), |
| |
| "assume" => (0, vec![tcx.types.bool], tcx.mk_unit()), |
| "likely" => (0, vec![tcx.types.bool], tcx.types.bool), |
| "unlikely" => (0, vec![tcx.types.bool], tcx.types.bool), |
| |
| "discriminant_value" => (1, vec![ |
| tcx.mk_imm_ref(tcx.mk_region(ty::ReLateBound(ty::INNERMOST, |
| ty::BrAnon(0))), |
| param(0))], tcx.types.u64), |
| |
| "try" => { |
| let mut_u8 = tcx.mk_mut_ptr(tcx.types.u8); |
| let fn_ty = ty::Binder::bind(tcx.mk_fn_sig( |
| iter::once(mut_u8), |
| tcx.mk_unit(), |
| false, |
| hir::Unsafety::Normal, |
| Abi::Rust, |
| )); |
| (0, vec![tcx.mk_fn_ptr(fn_ty), mut_u8, mut_u8], tcx.types.i32) |
| } |
| |
| "va_start" | "va_end" => { |
| match mk_va_list_ty() { |
| Some(va_list_ty) => (0, vec![va_list_ty], tcx.mk_unit()), |
| None => bug!("va_list lang_item must be defined to use va_list intrinsics") |
| } |
| } |
| |
| "va_copy" => { |
| match tcx.lang_items().va_list() { |
| Some(did) => { |
| let region = tcx.mk_region(ty::ReLateBound(ty::INNERMOST, ty::BrAnon(0))); |
| let env_region = ty::ReLateBound(ty::INNERMOST, ty::BrEnv); |
| let va_list_ty = tcx.type_of(did).subst(tcx, &[region.into()]); |
| let ret_ty = match va_list_ty.sty { |
| ty::Adt(def, _) if def.is_struct() => { |
| let fields = &def.non_enum_variant().fields; |
| match tcx.type_of(fields[0].did).subst(tcx, &[region.into()]).sty { |
| ty::Ref(_, element_ty, _) => match element_ty.sty { |
| ty::Adt(..) => element_ty, |
| _ => va_list_ty |
| } |
| _ => bug!("va_list structure is invalid") |
| } |
| } |
| _ => { |
| bug!("va_list structure is invalid") |
| } |
| }; |
| (0, vec![tcx.mk_imm_ref(tcx.mk_region(env_region), va_list_ty)], ret_ty) |
| } |
| None => bug!("va_list lang_item must be defined to use va_list intrinsics") |
| } |
| } |
| |
| "va_arg" => { |
| match mk_va_list_ty() { |
| Some(va_list_ty) => (1, vec![va_list_ty], param(0)), |
| None => bug!("va_list lang_item must be defined to use va_list intrinsics") |
| } |
| } |
| |
| "nontemporal_store" => { |
| (1, vec![ tcx.mk_mut_ptr(param(0)), param(0) ], tcx.mk_unit()) |
| } |
| |
| ref other => { |
| struct_span_err!(tcx.sess, it.span, E0093, |
| "unrecognized intrinsic function: `{}`", |
| *other) |
| .span_label(it.span, "unrecognized intrinsic") |
| .emit(); |
| return; |
| } |
| }; |
| (n_tps, inputs, output, unsafety) |
| }; |
| equate_intrinsic_type(tcx, it, n_tps, Abi::RustIntrinsic, unsafety, inputs, output) |
| } |
| |
| /// Type-check `extern "platform-intrinsic" { ... }` functions. |
| pub fn check_platform_intrinsic_type<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, |
| it: &hir::ForeignItem) { |
| let param = |n| { |
| let name = Symbol::intern(&format!("P{}", n)).as_interned_str(); |
| tcx.mk_ty_param(n, name) |
| }; |
| |
| let def_id = tcx.hir().local_def_id(it.id); |
| let i_n_tps = tcx.generics_of(def_id).own_counts().types; |
| let name = it.ident.as_str(); |
| |
| let (n_tps, inputs, output) = match &*name { |
| "simd_eq" | "simd_ne" | "simd_lt" | "simd_le" | "simd_gt" | "simd_ge" => { |
| (2, vec![param(0), param(0)], param(1)) |
| } |
| "simd_add" | "simd_sub" | "simd_mul" | "simd_rem" | |
| "simd_div" | "simd_shl" | "simd_shr" | |
| "simd_and" | "simd_or" | "simd_xor" | |
| "simd_fmin" | "simd_fmax" | "simd_fpow" => { |
| (1, vec![param(0), param(0)], param(0)) |
| } |
| "simd_fsqrt" | "simd_fsin" | "simd_fcos" | "simd_fexp" | "simd_fexp2" | |
| "simd_flog2" | "simd_flog10" | "simd_flog" | |
| "simd_fabs" | "simd_floor" | "simd_ceil" => { |
| (1, vec![param(0)], param(0)) |
| } |
| "simd_fpowi" => { |
| (1, vec![param(0), tcx.types.i32], param(0)) |
| } |
| "simd_fma" => { |
| (1, vec![param(0), param(0), param(0)], param(0)) |
| } |
| "simd_gather" => { |
| (3, vec![param(0), param(1), param(2)], param(0)) |
| } |
| "simd_scatter" => { |
| (3, vec![param(0), param(1), param(2)], tcx.mk_unit()) |
| } |
| "simd_insert" => (2, vec![param(0), tcx.types.u32, param(1)], param(0)), |
| "simd_extract" => (2, vec![param(0), tcx.types.u32], param(1)), |
| "simd_cast" => (2, vec![param(0)], param(1)), |
| "simd_select" | |
| "simd_select_bitmask" => (2, vec![param(0), param(1), param(1)], param(1)), |
| "simd_reduce_all" | "simd_reduce_any" => (1, vec![param(0)], tcx.types.bool), |
| "simd_reduce_add_ordered" | "simd_reduce_mul_ordered" |
| => (2, vec![param(0), param(1)], param(1)), |
| "simd_reduce_add_unordered" | "simd_reduce_mul_unordered" | |
| "simd_reduce_and" | "simd_reduce_or" | "simd_reduce_xor" | |
| "simd_reduce_min" | "simd_reduce_max" | |
| "simd_reduce_min_nanless" | "simd_reduce_max_nanless" |
| => (2, vec![param(0)], param(1)), |
| name if name.starts_with("simd_shuffle") => { |
| match name["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(_) => { |
| span_err!(tcx.sess, it.span, E0439, |
| "invalid `simd_shuffle`, needs length: `{}`", name); |
| return |
| } |
| } |
| } |
| _ => { |
| match intrinsics::Intrinsic::find(&name) { |
| Some(intr) => { |
| // this function is a platform specific intrinsic |
| if i_n_tps != 0 { |
| span_err!(tcx.sess, it.span, E0440, |
| "platform-specific intrinsic has wrong number of type \ |
| parameters: found {}, expected 0", |
| i_n_tps); |
| return |
| } |
| |
| let mut structural_to_nomimal = FxHashMap::default(); |
| |
| let sig = tcx.fn_sig(def_id); |
| let sig = sig.no_bound_vars().unwrap(); |
| if intr.inputs.len() != sig.inputs().len() { |
| span_err!(tcx.sess, it.span, E0444, |
| "platform-specific intrinsic has invalid number of \ |
| arguments: found {}, expected {}", |
| sig.inputs().len(), intr.inputs.len()); |
| return |
| } |
| let input_pairs = intr.inputs.iter().zip(sig.inputs()); |
| for (i, (expected_arg, arg)) in input_pairs.enumerate() { |
| match_intrinsic_type_to_type(tcx, &format!("argument {}", i + 1), it.span, |
| &mut structural_to_nomimal, expected_arg, arg); |
| } |
| match_intrinsic_type_to_type(tcx, "return value", it.span, |
| &mut structural_to_nomimal, |
| &intr.output, sig.output()); |
| return |
| } |
| None => { |
| span_err!(tcx.sess, it.span, E0441, |
| "unrecognized platform-specific intrinsic function: `{}`", name); |
| return; |
| } |
| } |
| } |
| }; |
| |
| equate_intrinsic_type(tcx, it, n_tps, Abi::PlatformIntrinsic, hir::Unsafety::Unsafe, |
| inputs, output) |
| } |
| |
| // walk the expected type and the actual type in lock step, checking they're |
| // the same, in a kinda-structural way, i.e., `Vector`s have to be simd structs with |
| // exactly the right element type |
| fn match_intrinsic_type_to_type<'a, 'tcx>( |
| tcx: TyCtxt<'a, 'tcx, 'tcx>, |
| position: &str, |
| span: Span, |
| structural_to_nominal: &mut FxHashMap<&'a intrinsics::Type, Ty<'tcx>>, |
| expected: &'a intrinsics::Type, t: Ty<'tcx>) |
| { |
| use intrinsics::Type::*; |
| |
| let simple_error = |real: &str, expected: &str| { |
| span_err!(tcx.sess, span, E0442, |
| "intrinsic {} has wrong type: found {}, expected {}", |
| position, real, expected) |
| }; |
| |
| match *expected { |
| Void => match t.sty { |
| ty::Tuple(ref v) if v.is_empty() => {}, |
| _ => simple_error(&format!("`{}`", t), "()"), |
| }, |
| // (The width we pass to LLVM doesn't concern the type checker.) |
| Integer(signed, bits, _llvm_width) => match (signed, bits, &t.sty) { |
| (true, 8, &ty::Int(ast::IntTy::I8)) | |
| (false, 8, &ty::Uint(ast::UintTy::U8)) | |
| (true, 16, &ty::Int(ast::IntTy::I16)) | |
| (false, 16, &ty::Uint(ast::UintTy::U16)) | |
| (true, 32, &ty::Int(ast::IntTy::I32)) | |
| (false, 32, &ty::Uint(ast::UintTy::U32)) | |
| (true, 64, &ty::Int(ast::IntTy::I64)) | |
| (false, 64, &ty::Uint(ast::UintTy::U64)) | |
| (true, 128, &ty::Int(ast::IntTy::I128)) | |
| (false, 128, &ty::Uint(ast::UintTy::U128)) => {}, |
| _ => simple_error(&format!("`{}`", t), |
| &format!("`{}{n}`", |
| if signed {"i"} else {"u"}, |
| n = bits)), |
| }, |
| Float(bits) => match (bits, &t.sty) { |
| (32, &ty::Float(ast::FloatTy::F32)) | |
| (64, &ty::Float(ast::FloatTy::F64)) => {}, |
| _ => simple_error(&format!("`{}`", t), |
| &format!("`f{n}`", n = bits)), |
| }, |
| Pointer(ref inner_expected, ref _llvm_type, const_) => { |
| match t.sty { |
| ty::RawPtr(ty::TypeAndMut { ty, mutbl }) => { |
| if (mutbl == hir::MutImmutable) != const_ { |
| simple_error(&format!("`{}`", t), |
| if const_ {"const pointer"} else {"mut pointer"}) |
| } |
| match_intrinsic_type_to_type(tcx, position, span, structural_to_nominal, |
| inner_expected, ty) |
| } |
| _ => simple_error(&format!("`{}`", t), "raw pointer"), |
| } |
| } |
| Vector(ref inner_expected, ref _llvm_type, len) => { |
| if !t.is_simd() { |
| simple_error(&format!("non-simd type `{}`", t), "simd type"); |
| return; |
| } |
| let t_len = t.simd_size(tcx); |
| if len as usize != t_len { |
| simple_error(&format!("vector with length {}", t_len), |
| &format!("length {}", len)); |
| return; |
| } |
| let t_ty = t.simd_type(tcx); |
| { |
| // check that a given structural type always has the same an intrinsic definition |
| let previous = structural_to_nominal.entry(expected).or_insert(t); |
| if *previous != t { |
| // this gets its own error code because it is non-trivial |
| span_err!(tcx.sess, span, E0443, |
| "intrinsic {} has wrong type: found `{}`, expected `{}` which \ |
| was used for this vector type previously in this signature", |
| position, |
| t, |
| *previous); |
| return; |
| } |
| } |
| match_intrinsic_type_to_type(tcx, |
| position, |
| span, |
| structural_to_nominal, |
| inner_expected, |
| t_ty) |
| } |
| Aggregate(_flatten, ref expected_contents) => { |
| match t.sty { |
| ty::Tuple(contents) => { |
| if contents.len() != expected_contents.len() { |
| simple_error(&format!("tuple with length {}", contents.len()), |
| &format!("tuple with length {}", expected_contents.len())); |
| return |
| } |
| for (e, c) in expected_contents.iter().zip(contents) { |
| match_intrinsic_type_to_type(tcx, position, span, structural_to_nominal, |
| e, c) |
| } |
| } |
| _ => simple_error(&format!("`{}`", t), |
| "tuple"), |
| } |
| } |
| } |
| } |
