use gccjit::{RValue, Struct, Type}; use rustc_codegen_ssa::traits::{BaseTypeMethods, DerivedTypeMethods, TypeMembershipMethods}; use rustc_codegen_ssa::common::TypeKind; use rustc_middle::{bug, ty}; use rustc_middle::ty::layout::TyAndLayout; use rustc_target::abi::{AddressSpace, Align, Integer, Size}; use crate::common::TypeReflection; use crate::context::CodegenCx; use crate::type_of::LayoutGccExt; impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> { pub fn type_ix(&self, num_bits: u64) -> Type<'gcc> { // gcc only supports 1, 2, 4 or 8-byte integers. // FIXME(antoyo): this is misleading to use the next power of two as rustc_codegen_ssa // sometimes use 96-bit numbers and the following code will give an integer of a different // size. let bytes = (num_bits / 8).next_power_of_two() as i32; match bytes { 1 => self.i8_type, 2 => self.i16_type, 4 => self.i32_type, 8 => self.i64_type, 16 => self.i128_type, _ => panic!("unexpected num_bits: {}", num_bits), } } pub fn type_void(&self) -> Type<'gcc> { self.context.new_type::<()>() } pub fn type_size_t(&self) -> Type<'gcc> { self.context.new_type::() } pub fn type_u8(&self) -> Type<'gcc> { self.u8_type } pub fn type_u16(&self) -> Type<'gcc> { self.u16_type } pub fn type_u32(&self) -> Type<'gcc> { self.u32_type } pub fn type_u64(&self) -> Type<'gcc> { self.u64_type } pub fn type_u128(&self) -> Type<'gcc> { self.u128_type } pub fn type_ptr_to(&self, ty: Type<'gcc>) -> Type<'gcc> { ty.make_pointer() } pub fn type_ptr_to_ext(&self, ty: Type<'gcc>, _address_space: AddressSpace) -> Type<'gcc> { // TODO(antoyo): use address_space, perhaps with TYPE_ADDR_SPACE? ty.make_pointer() } pub fn type_i8p(&self) -> Type<'gcc> { self.type_ptr_to(self.type_i8()) } pub fn type_i8p_ext(&self, address_space: AddressSpace) -> Type<'gcc> { self.type_ptr_to_ext(self.type_i8(), address_space) } pub fn type_pointee_for_align(&self, align: Align) -> Type<'gcc> { // FIXME(eddyb) We could find a better approximation if ity.align < align. let ity = Integer::approximate_align(self, align); self.type_from_integer(ity) } pub fn type_vector(&self, ty: Type<'gcc>, len: u64) -> Type<'gcc> { self.context.new_vector_type(ty, len) } pub fn type_float_from_ty(&self, t: ty::FloatTy) -> Type<'gcc> { match t { ty::FloatTy::F32 => self.type_f32(), ty::FloatTy::F64 => self.type_f64(), } } } impl<'gcc, 'tcx> BaseTypeMethods<'tcx> for CodegenCx<'gcc, 'tcx> { fn type_i1(&self) -> Type<'gcc> { self.bool_type } fn type_i8(&self) -> Type<'gcc> { self.i8_type } fn type_i16(&self) -> Type<'gcc> { self.i16_type } fn type_i32(&self) -> Type<'gcc> { self.i32_type } fn type_i64(&self) -> Type<'gcc> { self.i64_type } fn type_i128(&self) -> Type<'gcc> { self.i128_type } fn type_isize(&self) -> Type<'gcc> { self.isize_type } fn type_f32(&self) -> Type<'gcc> { self.float_type } fn type_f64(&self) -> Type<'gcc> { self.double_type } fn type_func(&self, params: &[Type<'gcc>], return_type: Type<'gcc>) -> Type<'gcc> { self.context.new_function_pointer_type(None, return_type, params, false) } fn type_struct(&self, fields: &[Type<'gcc>], packed: bool) -> Type<'gcc> { let types = fields.to_vec(); if let Some(typ) = self.struct_types.borrow().get(fields) { return typ.clone(); } let fields: Vec<_> = fields.iter().enumerate() .map(|(index, field)| self.context.new_field(None, *field, &format!("field{}_TODO", index))) .collect(); let typ = self.context.new_struct_type(None, "struct", &fields).as_type(); if packed { #[cfg(feature="master")] typ.set_packed(); } self.struct_types.borrow_mut().insert(types, typ); typ } fn type_kind(&self, typ: Type<'gcc>) -> TypeKind { if self.is_int_type_or_bool(typ) { TypeKind::Integer } else if typ.is_compatible_with(self.float_type) { TypeKind::Float } else if typ.is_compatible_with(self.double_type) { TypeKind::Double } else if typ.is_vector() { TypeKind::Vector } else { // TODO(antoyo): support other types. TypeKind::Void } } fn type_ptr(&self) -> Type<'gcc> { self.type_ptr_to(self.type_void()) } fn type_ptr_ext(&self, address_space: AddressSpace) -> Type<'gcc> { self.type_ptr_to_ext(self.type_void(), address_space) } fn element_type(&self, ty: Type<'gcc>) -> Type<'gcc> { if let Some(typ) = ty.dyncast_array() { typ } else if let Some(vector_type) = ty.dyncast_vector() { vector_type.get_element_type() } else if let Some(typ) = ty.get_pointee() { typ } else { unreachable!() } } fn vector_length(&self, _ty: Type<'gcc>) -> usize { unimplemented!(); } fn float_width(&self, typ: Type<'gcc>) -> usize { let f32 = self.context.new_type::(); let f64 = self.context.new_type::(); if typ.is_compatible_with(f32) { 32 } else if typ.is_compatible_with(f64) { 64 } else { panic!("Cannot get width of float type {:?}", typ); } // TODO(antoyo): support other sizes. } fn int_width(&self, typ: Type<'gcc>) -> u64 { self.gcc_int_width(typ) } fn val_ty(&self, value: RValue<'gcc>) -> Type<'gcc> { value.get_type() } #[cfg_attr(feature="master", allow(unused_mut))] fn type_array(&self, ty: Type<'gcc>, mut len: u64) -> Type<'gcc> { #[cfg(not(feature="master"))] if let Some(struct_type) = ty.is_struct() { if struct_type.get_field_count() == 0 { // NOTE: since gccjit only supports i32 for the array size and libcore's tests uses a // size of usize::MAX in test_binary_search, we workaround this by setting the size to // zero for ZSTs. len = 0; } } self.context.new_array_type(None, ty, len) } } impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> { pub fn type_padding_filler(&self, size: Size, align: Align) -> Type<'gcc> { let unit = Integer::approximate_align(self, align); let size = size.bytes(); let unit_size = unit.size().bytes(); assert_eq!(size % unit_size, 0); self.type_array(self.type_from_integer(unit), size / unit_size) } pub fn set_struct_body(&self, typ: Struct<'gcc>, fields: &[Type<'gcc>], packed: bool) { let fields: Vec<_> = fields.iter().enumerate() .map(|(index, field)| self.context.new_field(None, *field, &format!("field_{}", index))) .collect(); typ.set_fields(None, &fields); if packed { #[cfg(feature="master")] typ.as_type().set_packed(); } } pub fn type_named_struct(&self, name: &str) -> Struct<'gcc> { self.context.new_opaque_struct_type(None, name) } } pub fn struct_fields<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, layout: TyAndLayout<'tcx>) -> (Vec>, bool) { let field_count = layout.fields.count(); let mut packed = false; let mut offset = Size::ZERO; let mut prev_effective_align = layout.align.abi; let mut result: Vec<_> = Vec::with_capacity(1 + field_count * 2); for i in layout.fields.index_by_increasing_offset() { let target_offset = layout.fields.offset(i as usize); let field = layout.field(cx, i); let effective_field_align = layout.align.abi.min(field.align.abi).restrict_for_offset(target_offset); packed |= effective_field_align < field.align.abi; assert!(target_offset >= offset); let padding = target_offset - offset; let padding_align = prev_effective_align.min(effective_field_align); assert_eq!(offset.align_to(padding_align) + padding, target_offset); result.push(cx.type_padding_filler(padding, padding_align)); result.push(field.gcc_type(cx)); offset = target_offset + field.size; prev_effective_align = effective_field_align; } if layout.is_sized() && field_count > 0 { if offset > layout.size { bug!("layout: {:#?} stride: {:?} offset: {:?}", layout, layout.size, offset); } let padding = layout.size - offset; let padding_align = prev_effective_align; assert_eq!(offset.align_to(padding_align) + padding, layout.size); result.push(cx.type_padding_filler(padding, padding_align)); assert_eq!(result.len(), 1 + field_count * 2); } (result, packed) } impl<'gcc, 'tcx> TypeMembershipMethods<'tcx> for CodegenCx<'gcc, 'tcx> { }