1 use std::convert::TryFrom;
4 use gccjit::{Block, CType, RValue, Type, ToRValue};
5 use rustc_codegen_ssa::mir::place::PlaceRef;
6 use rustc_codegen_ssa::traits::{
13 use rustc_middle::mir::Mutability;
14 use rustc_middle::ty::ScalarInt;
15 use rustc_middle::ty::layout::{TyAndLayout, LayoutOf};
16 use rustc_middle::mir::interpret::{ConstAllocation, GlobalAlloc, Scalar};
17 use rustc_span::Symbol;
18 use rustc_target::abi::{self, HasDataLayout, Pointer, Size};
20 use crate::consts::const_alloc_to_gcc;
21 use crate::context::CodegenCx;
22 use crate::type_of::LayoutGccExt;
24 impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
25 pub fn const_bytes(&self, bytes: &[u8]) -> RValue<'gcc> {
26 bytes_in_context(self, bytes)
29 fn global_string(&self, string: &str) -> LValue<'gcc> {
30 // TODO(antoyo): handle non-null-terminated strings.
31 let string = self.context.new_string_literal(&*string);
32 let sym = self.generate_local_symbol_name("str");
33 let global = self.declare_private_global(&sym, self.val_ty(string));
34 global.global_set_initializer_rvalue(string);
36 // TODO(antoyo): set linkage.
39 pub fn inttoptr(&self, block: Block<'gcc>, value: RValue<'gcc>, dest_ty: Type<'gcc>) -> RValue<'gcc> {
40 let func = block.get_function();
41 let local = func.new_local(None, value.get_type(), "intLocal");
42 block.add_assignment(None, local, value);
43 let value_address = local.get_address(None);
45 let ptr = self.context.new_cast(None, value_address, dest_ty.make_pointer());
46 ptr.dereference(None).to_rvalue()
49 pub fn ptrtoint(&self, block: Block<'gcc>, value: RValue<'gcc>, dest_ty: Type<'gcc>) -> RValue<'gcc> {
50 // TODO(antoyo): when libgccjit allow casting from pointer to int, remove this.
51 let func = block.get_function();
52 let local = func.new_local(None, value.get_type(), "ptrLocal");
53 block.add_assignment(None, local, value);
54 let ptr_address = local.get_address(None);
56 let ptr = self.context.new_cast(None, ptr_address, dest_ty.make_pointer());
57 ptr.dereference(None).to_rvalue()
61 pub fn bytes_in_context<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, bytes: &[u8]) -> RValue<'gcc> {
62 let context = &cx.context;
63 let byte_type = context.new_type::<u8>();
64 let typ = context.new_array_type(None, byte_type, bytes.len() as i32);
65 let elements: Vec<_> =
67 .map(|&byte| context.new_rvalue_from_int(byte_type, byte as i32))
69 context.new_array_constructor(None, typ, &elements)
72 pub fn type_is_pointer<'gcc>(typ: Type<'gcc>) -> bool {
73 typ.get_pointee().is_some()
76 impl<'gcc, 'tcx> ConstMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
77 fn const_null(&self, typ: Type<'gcc>) -> RValue<'gcc> {
78 if type_is_pointer(typ) {
79 self.context.new_null(typ)
82 self.const_int(typ, 0)
86 fn const_undef(&self, typ: Type<'gcc>) -> RValue<'gcc> {
87 let local = self.current_func.borrow().expect("func")
88 .new_local(None, typ, "undefined");
89 if typ.is_struct().is_some() {
90 // NOTE: hack to workaround a limitation of the rustc API: see comment on
91 // CodegenCx.structs_as_pointer
92 let pointer = local.get_address(None);
93 self.structs_as_pointer.borrow_mut().insert(pointer);
101 fn const_int(&self, typ: Type<'gcc>, int: i64) -> RValue<'gcc> {
102 self.context.new_rvalue_from_long(typ, i64::try_from(int).expect("i64::try_from"))
105 fn const_uint(&self, typ: Type<'gcc>, int: u64) -> RValue<'gcc> {
106 self.context.new_rvalue_from_long(typ, u64::try_from(int).expect("u64::try_from") as i64)
109 fn const_uint_big(&self, typ: Type<'gcc>, num: u128) -> RValue<'gcc> {
111 // FIXME(antoyo): use a new function new_rvalue_from_unsigned_long()?
112 let low = self.context.new_rvalue_from_long(self.u64_type, num as u64 as i64);
113 let high = self.context.new_rvalue_from_long(typ, (num >> 64) as u64 as i64);
115 let sixty_four = self.context.new_rvalue_from_long(typ, 64);
116 (high << sixty_four) | self.context.new_cast(None, low, typ)
118 else if typ.is_i128(self) {
119 let num = self.context.new_rvalue_from_long(self.u64_type, num as u64 as i64);
120 self.context.new_cast(None, num, typ)
123 self.context.new_rvalue_from_long(typ, num as u64 as i64)
127 fn const_bool(&self, val: bool) -> RValue<'gcc> {
128 self.const_uint(self.type_i1(), val as u64)
131 fn const_i32(&self, i: i32) -> RValue<'gcc> {
132 self.const_int(self.type_i32(), i as i64)
135 fn const_u32(&self, i: u32) -> RValue<'gcc> {
136 self.const_uint(self.type_u32(), i as u64)
139 fn const_u64(&self, i: u64) -> RValue<'gcc> {
140 self.const_uint(self.type_u64(), i)
143 fn const_usize(&self, i: u64) -> RValue<'gcc> {
144 let bit_size = self.data_layout().pointer_size.bits();
146 // make sure it doesn't overflow
147 assert!(i < (1 << bit_size));
150 self.const_uint(self.usize_type, i)
153 fn const_u8(&self, _i: u8) -> RValue<'gcc> {
157 fn const_real(&self, _t: Type<'gcc>, _val: f64) -> RValue<'gcc> {
161 fn const_str(&self, s: Symbol) -> (RValue<'gcc>, RValue<'gcc>) {
162 let s_str = s.as_str();
163 let str_global = *self.const_str_cache.borrow_mut().entry(s).or_insert_with(|| {
164 self.global_string(s_str)
166 let len = s_str.len();
167 let cs = self.const_ptrcast(str_global.get_address(None),
168 self.type_ptr_to(self.layout_of(self.tcx.types.str_).gcc_type(self, true)),
170 (cs, self.const_usize(len as u64))
173 fn const_struct(&self, values: &[RValue<'gcc>], packed: bool) -> RValue<'gcc> {
174 let fields: Vec<_> = values.iter()
175 .map(|value| value.get_type())
177 // TODO(antoyo): cache the type? It's anonymous, so probably not.
178 let typ = self.type_struct(&fields, packed);
179 let struct_type = typ.is_struct().expect("struct type");
180 self.context.new_struct_constructor(None, struct_type.as_type(), None, values)
183 fn const_to_opt_uint(&self, _v: RValue<'gcc>) -> Option<u64> {
188 fn const_to_opt_u128(&self, _v: RValue<'gcc>, _sign_ext: bool) -> Option<u128> {
193 fn scalar_to_backend(&self, cv: Scalar, layout: abi::Scalar, ty: Type<'gcc>) -> RValue<'gcc> {
194 let bitsize = if layout.is_bool() { 1 } else { layout.value.size(self).bits() };
196 Scalar::Int(ScalarInt::ZST) => {
197 assert_eq!(0, layout.value.size(self).bytes());
198 self.const_undef(self.type_ix(0))
200 Scalar::Int(int) => {
201 let data = int.assert_bits(layout.value.size(self));
203 // FIXME(antoyo): there's some issues with using the u128 code that follows, so hard-code
204 // the paths for floating-point values.
205 if ty == self.float_type {
206 return self.context.new_rvalue_from_double(ty, f32::from_bits(data as u32) as f64);
208 else if ty == self.double_type {
209 return self.context.new_rvalue_from_double(ty, f64::from_bits(data as u64));
212 let value = self.const_uint_big(self.type_ix(bitsize), data);
213 if layout.value == Pointer {
214 self.inttoptr(self.current_block.borrow().expect("block"), value, ty)
216 self.const_bitcast(value, ty)
219 Scalar::Ptr(ptr, _size) => {
220 let (alloc_id, offset) = ptr.into_parts();
222 match self.tcx.global_alloc(alloc_id) {
223 GlobalAlloc::Memory(alloc) => {
224 let init = const_alloc_to_gcc(self, alloc);
225 let alloc = alloc.inner();
227 match alloc.mutability {
228 Mutability::Mut => self.static_addr_of_mut(init, alloc.align, None),
229 _ => self.static_addr_of(init, alloc.align, None),
231 if !self.sess().fewer_names() {
232 // TODO(antoyo): set value name.
236 GlobalAlloc::Function(fn_instance) => {
237 self.get_fn_addr(fn_instance)
239 GlobalAlloc::Static(def_id) => {
240 assert!(self.tcx.is_static(def_id));
241 self.get_static(def_id).get_address(None)
244 let ptr_type = base_addr.get_type();
245 let base_addr = self.const_bitcast(base_addr, self.usize_type);
246 let offset = self.context.new_rvalue_from_long(self.usize_type, offset.bytes() as i64);
247 let ptr = self.const_bitcast(base_addr + offset, ptr_type);
248 if layout.value != Pointer {
249 self.const_bitcast(ptr.dereference(None).to_rvalue(), ty)
252 self.const_bitcast(ptr, ty)
258 fn const_data_from_alloc(&self, alloc: ConstAllocation<'tcx>) -> Self::Value {
259 const_alloc_to_gcc(self, alloc)
262 fn from_const_alloc(&self, layout: TyAndLayout<'tcx>, alloc: ConstAllocation<'tcx>, offset: Size) -> PlaceRef<'tcx, RValue<'gcc>> {
263 assert_eq!(alloc.inner().align, layout.align.abi);
264 let ty = self.type_ptr_to(layout.gcc_type(self, true));
266 if layout.size == Size::ZERO {
267 let value = self.const_usize(alloc.inner().align.bytes());
268 self.context.new_cast(None, value, ty)
271 let init = const_alloc_to_gcc(self, alloc);
272 let base_addr = self.static_addr_of(init, alloc.inner().align, None);
274 let array = self.const_bitcast(base_addr, self.type_i8p());
275 let value = self.context.new_array_access(None, array, self.const_usize(offset.bytes())).get_address(None);
276 self.const_bitcast(value, ty)
278 PlaceRef::new_sized(value, layout)
281 fn const_ptrcast(&self, val: RValue<'gcc>, ty: Type<'gcc>) -> RValue<'gcc> {
282 self.context.new_cast(None, val, ty)
286 pub trait SignType<'gcc, 'tcx> {
287 fn is_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
288 fn is_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
289 fn to_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc>;
290 fn to_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc>;
293 impl<'gcc, 'tcx> SignType<'gcc, 'tcx> for Type<'gcc> {
294 fn is_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
295 self.is_i8(cx) || self.is_i16(cx) || self.is_i32(cx) || self.is_i64(cx) || self.is_i128(cx)
298 fn is_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
299 self.is_u8(cx) || self.is_u16(cx) || self.is_u32(cx) || self.is_u64(cx) || self.is_u128(cx)
302 fn to_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc> {
306 else if self.is_u16(cx) {
309 else if self.is_u32(cx) {
312 else if self.is_u64(cx) {
315 else if self.is_u128(cx) {
323 fn to_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc> {
327 else if self.is_i16(cx) {
330 else if self.is_i32(cx) {
333 else if self.is_i64(cx) {
336 else if self.is_i128(cx) {
345 pub trait TypeReflection<'gcc, 'tcx> {
346 fn is_uchar(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
347 fn is_ushort(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
348 fn is_uint(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
349 fn is_ulong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
350 fn is_ulonglong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
352 fn is_i8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
353 fn is_u8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
354 fn is_i16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
355 fn is_u16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
356 fn is_i32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
357 fn is_u32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
358 fn is_i64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
359 fn is_u64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
360 fn is_i128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
361 fn is_u128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
363 fn is_f32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
364 fn is_f64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
367 impl<'gcc, 'tcx> TypeReflection<'gcc, 'tcx> for Type<'gcc> {
368 fn is_uchar(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
369 self.unqualified() == cx.u8_type
372 fn is_ushort(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
373 self.unqualified() == cx.u16_type
376 fn is_uint(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
377 self.unqualified() == cx.uint_type
380 fn is_ulong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
381 self.unqualified() == cx.ulong_type
384 fn is_ulonglong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
385 self.unqualified() == cx.ulonglong_type
388 fn is_i8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
389 self.unqualified() == cx.i8_type
392 fn is_u8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
393 self.unqualified() == cx.u8_type
396 fn is_i16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
397 self.unqualified() == cx.i16_type
400 fn is_u16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
401 self.unqualified() == cx.u16_type
404 fn is_i32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
405 self.unqualified() == cx.i32_type
408 fn is_u32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
409 self.unqualified() == cx.u32_type
412 fn is_i64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
413 self.unqualified() == cx.i64_type
416 fn is_u64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
417 self.unqualified() == cx.u64_type
420 fn is_i128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
421 self.unqualified() == cx.context.new_c_type(CType::Int128t)
424 fn is_u128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
425 self.unqualified() == cx.context.new_c_type(CType::UInt128t)
428 fn is_f32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
429 self.unqualified() == cx.context.new_type::<f32>()
432 fn is_f64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
433 self.unqualified() == cx.context.new_type::<f64>()