2 use gccjit::{RValue, Type, ToRValue};
3 use rustc_codegen_ssa::mir::place::PlaceRef;
4 use rustc_codegen_ssa::traits::{
11 use rustc_middle::mir::Mutability;
12 use rustc_middle::ty::ScalarInt;
13 use rustc_middle::ty::layout::{TyAndLayout, LayoutOf};
14 use rustc_middle::mir::interpret::{ConstAllocation, GlobalAlloc, Scalar};
15 use rustc_span::Symbol;
16 use rustc_target::abi::{self, HasDataLayout, Pointer, Size};
18 use crate::consts::const_alloc_to_gcc;
19 use crate::context::CodegenCx;
20 use crate::type_of::LayoutGccExt;
22 impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
23 pub fn const_bytes(&self, bytes: &[u8]) -> RValue<'gcc> {
24 bytes_in_context(self, bytes)
27 fn global_string(&self, string: &str) -> LValue<'gcc> {
28 // TODO(antoyo): handle non-null-terminated strings.
29 let string = self.context.new_string_literal(&*string);
30 let sym = self.generate_local_symbol_name("str");
31 let global = self.declare_private_global(&sym, self.val_ty(string));
32 global.global_set_initializer_rvalue(string);
34 // TODO(antoyo): set linkage.
38 pub fn bytes_in_context<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, bytes: &[u8]) -> RValue<'gcc> {
39 let context = &cx.context;
40 let byte_type = context.new_type::<u8>();
41 let typ = context.new_array_type(None, byte_type, bytes.len() as i32);
42 let elements: Vec<_> =
44 .map(|&byte| context.new_rvalue_from_int(byte_type, byte as i32))
46 context.new_array_constructor(None, typ, &elements)
49 pub fn type_is_pointer<'gcc>(typ: Type<'gcc>) -> bool {
50 typ.get_pointee().is_some()
53 impl<'gcc, 'tcx> ConstMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
54 fn const_null(&self, typ: Type<'gcc>) -> RValue<'gcc> {
55 if type_is_pointer(typ) {
56 self.context.new_null(typ)
59 self.const_int(typ, 0)
63 fn const_undef(&self, typ: Type<'gcc>) -> RValue<'gcc> {
64 let local = self.current_func.borrow().expect("func")
65 .new_local(None, typ, "undefined");
66 if typ.is_struct().is_some() {
67 // NOTE: hack to workaround a limitation of the rustc API: see comment on
68 // CodegenCx.structs_as_pointer
69 let pointer = local.get_address(None);
70 self.structs_as_pointer.borrow_mut().insert(pointer);
78 fn const_int(&self, typ: Type<'gcc>, int: i64) -> RValue<'gcc> {
79 self.gcc_int(typ, int)
82 fn const_uint(&self, typ: Type<'gcc>, int: u64) -> RValue<'gcc> {
83 self.gcc_uint(typ, int)
86 fn const_uint_big(&self, typ: Type<'gcc>, num: u128) -> RValue<'gcc> {
87 self.gcc_uint_big(typ, num)
90 fn const_bool(&self, val: bool) -> RValue<'gcc> {
91 self.const_uint(self.type_i1(), val as u64)
94 fn const_i16(&self, i: i16) -> RValue<'gcc> {
95 self.const_int(self.type_i16(), i as i64)
98 fn const_i32(&self, i: i32) -> RValue<'gcc> {
99 self.const_int(self.type_i32(), i as i64)
102 fn const_u32(&self, i: u32) -> RValue<'gcc> {
103 self.const_uint(self.type_u32(), i as u64)
106 fn const_u64(&self, i: u64) -> RValue<'gcc> {
107 self.const_uint(self.type_u64(), i)
110 fn const_usize(&self, i: u64) -> RValue<'gcc> {
111 let bit_size = self.data_layout().pointer_size.bits();
113 // make sure it doesn't overflow
114 assert!(i < (1 << bit_size));
117 self.const_uint(self.usize_type, i)
120 fn const_u8(&self, _i: u8) -> RValue<'gcc> {
124 fn const_real(&self, typ: Type<'gcc>, val: f64) -> RValue<'gcc> {
125 self.context.new_rvalue_from_double(typ, val)
128 fn const_str(&self, s: Symbol) -> (RValue<'gcc>, RValue<'gcc>) {
129 let s_str = s.as_str();
130 let str_global = *self.const_str_cache.borrow_mut().entry(s).or_insert_with(|| {
131 self.global_string(s_str)
133 let len = s_str.len();
134 let cs = self.const_ptrcast(str_global.get_address(None),
135 self.type_ptr_to(self.layout_of(self.tcx.types.str_).gcc_type(self, true)),
137 (cs, self.const_usize(len as u64))
140 fn const_struct(&self, values: &[RValue<'gcc>], packed: bool) -> RValue<'gcc> {
141 let fields: Vec<_> = values.iter()
142 .map(|value| value.get_type())
144 // TODO(antoyo): cache the type? It's anonymous, so probably not.
145 let typ = self.type_struct(&fields, packed);
146 let struct_type = typ.is_struct().expect("struct type");
147 self.context.new_struct_constructor(None, struct_type.as_type(), None, values)
150 fn const_to_opt_uint(&self, _v: RValue<'gcc>) -> Option<u64> {
155 fn const_to_opt_u128(&self, _v: RValue<'gcc>, _sign_ext: bool) -> Option<u128> {
160 fn scalar_to_backend(&self, cv: Scalar, layout: abi::Scalar, ty: Type<'gcc>) -> RValue<'gcc> {
161 let bitsize = if layout.is_bool() { 1 } else { layout.size(self).bits() };
163 Scalar::Int(ScalarInt::ZST) => {
164 assert_eq!(0, layout.size(self).bytes());
165 self.const_undef(self.type_ix(0))
167 Scalar::Int(int) => {
168 let data = int.assert_bits(layout.size(self));
170 // FIXME(antoyo): there's some issues with using the u128 code that follows, so hard-code
171 // the paths for floating-point values.
172 if ty == self.float_type {
173 return self.context.new_rvalue_from_double(ty, f32::from_bits(data as u32) as f64);
175 else if ty == self.double_type {
176 return self.context.new_rvalue_from_double(ty, f64::from_bits(data as u64));
179 let value = self.const_uint_big(self.type_ix(bitsize), data);
180 // TODO(bjorn3): assert size is correct
181 self.const_bitcast(value, ty)
183 Scalar::Ptr(ptr, _size) => {
184 let (alloc_id, offset) = ptr.into_parts();
186 match self.tcx.global_alloc(alloc_id) {
187 GlobalAlloc::Memory(alloc) => {
188 let init = const_alloc_to_gcc(self, alloc);
189 let alloc = alloc.inner();
191 match alloc.mutability {
192 Mutability::Mut => self.static_addr_of_mut(init, alloc.align, None),
193 _ => self.static_addr_of(init, alloc.align, None),
195 if !self.sess().fewer_names() {
196 // TODO(antoyo): set value name.
200 GlobalAlloc::Function(fn_instance) => {
201 self.get_fn_addr(fn_instance)
203 GlobalAlloc::Static(def_id) => {
204 assert!(self.tcx.is_static(def_id));
205 self.get_static(def_id).get_address(None)
208 let ptr_type = base_addr.get_type();
209 let base_addr = self.const_bitcast(base_addr, self.usize_type);
210 let offset = self.context.new_rvalue_from_long(self.usize_type, offset.bytes() as i64);
211 let ptr = self.const_bitcast(base_addr + offset, ptr_type);
212 if layout.primitive() != Pointer {
213 self.const_bitcast(ptr.dereference(None).to_rvalue(), ty)
216 self.const_bitcast(ptr, ty)
222 fn const_data_from_alloc(&self, alloc: ConstAllocation<'tcx>) -> Self::Value {
223 const_alloc_to_gcc(self, alloc)
226 fn from_const_alloc(&self, layout: TyAndLayout<'tcx>, alloc: ConstAllocation<'tcx>, offset: Size) -> PlaceRef<'tcx, RValue<'gcc>> {
227 assert_eq!(alloc.inner().align, layout.align.abi);
228 let ty = self.type_ptr_to(layout.gcc_type(self, true));
230 if layout.size == Size::ZERO {
231 let value = self.const_usize(alloc.inner().align.bytes());
232 self.context.new_cast(None, value, ty)
235 let init = const_alloc_to_gcc(self, alloc);
236 let base_addr = self.static_addr_of(init, alloc.inner().align, None);
238 let array = self.const_bitcast(base_addr, self.type_i8p());
239 let value = self.context.new_array_access(None, array, self.const_usize(offset.bytes())).get_address(None);
240 self.const_bitcast(value, ty)
242 PlaceRef::new_sized(value, layout)
245 fn const_ptrcast(&self, val: RValue<'gcc>, ty: Type<'gcc>) -> RValue<'gcc> {
246 self.context.new_cast(None, val, ty)
250 pub trait SignType<'gcc, 'tcx> {
251 fn is_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
252 fn is_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
253 fn to_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc>;
254 fn to_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc>;
257 impl<'gcc, 'tcx> SignType<'gcc, 'tcx> for Type<'gcc> {
258 fn is_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
259 self.is_i8(cx) || self.is_i16(cx) || self.is_i32(cx) || self.is_i64(cx) || self.is_i128(cx)
262 fn is_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
263 self.is_u8(cx) || self.is_u16(cx) || self.is_u32(cx) || self.is_u64(cx) || self.is_u128(cx)
266 fn to_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc> {
270 else if self.is_u16(cx) {
273 else if self.is_u32(cx) {
276 else if self.is_u64(cx) {
279 else if self.is_u128(cx) {
282 else if self.is_uchar(cx) {
285 else if self.is_ushort(cx) {
288 else if self.is_uint(cx) {
291 else if self.is_ulong(cx) {
294 else if self.is_ulonglong(cx) {
302 fn to_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc> {
306 else if self.is_i16(cx) {
309 else if self.is_i32(cx) {
312 else if self.is_i64(cx) {
315 else if self.is_i128(cx) {
318 else if self.is_char(cx) {
321 else if self.is_short(cx) {
324 else if self.is_int(cx) {
327 else if self.is_long(cx) {
330 else if self.is_longlong(cx) {
339 pub trait TypeReflection<'gcc, 'tcx> {
340 fn is_uchar(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
341 fn is_ushort(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
342 fn is_uint(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
343 fn is_ulong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
344 fn is_ulonglong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
345 fn is_char(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
346 fn is_short(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
347 fn is_int(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
348 fn is_long(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
349 fn is_longlong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
351 fn is_i8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
352 fn is_u8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
353 fn is_i16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
354 fn is_u16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
355 fn is_i32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
356 fn is_u32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
357 fn is_i64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
358 fn is_u64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
359 fn is_i128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
360 fn is_u128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
362 fn is_f32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
363 fn is_f64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
365 fn is_vector(&self) -> bool;
368 impl<'gcc, 'tcx> TypeReflection<'gcc, 'tcx> for Type<'gcc> {
369 fn is_uchar(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
370 self.unqualified() == cx.uchar_type
373 fn is_ushort(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
374 self.unqualified() == cx.ushort_type
377 fn is_uint(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
378 self.unqualified() == cx.uint_type
381 fn is_ulong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
382 self.unqualified() == cx.ulong_type
385 fn is_ulonglong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
386 self.unqualified() == cx.ulonglong_type
389 fn is_char(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
390 self.unqualified() == cx.char_type
393 fn is_short(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
394 self.unqualified() == cx.short_type
397 fn is_int(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
398 self.unqualified() == cx.int_type
401 fn is_long(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
402 self.unqualified() == cx.long_type
405 fn is_longlong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
406 self.unqualified() == cx.longlong_type
409 fn is_i8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
410 self.unqualified() == cx.i8_type
413 fn is_u8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
414 self.unqualified() == cx.u8_type
417 fn is_i16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
418 self.unqualified() == cx.i16_type
421 fn is_u16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
422 self.unqualified() == cx.u16_type
425 fn is_i32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
426 self.unqualified() == cx.i32_type
429 fn is_u32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
430 self.unqualified() == cx.u32_type
433 fn is_i64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
434 self.unqualified() == cx.i64_type
437 fn is_u64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
438 self.unqualified() == cx.u64_type
441 fn is_i128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
442 self.unqualified() == cx.i128_type.unqualified()
445 fn is_u128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
446 self.unqualified() == cx.u128_type.unqualified()
449 fn is_f32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
450 self.unqualified() == cx.context.new_type::<f32>()
453 fn is_f64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
454 self.unqualified() == cx.context.new_type::<f64>()
457 fn is_vector(&self) -> bool {
458 let mut typ = self.clone();
460 if typ.dyncast_vector().is_some() {
465 typ = typ.unqualified();