1 use rustc_index::vec::IndexVec;
2 use rustc_middle::ty::SymbolName;
3 use rustc_target::abi::call::FnAbi;
4 use rustc_target::abi::{Integer, Primitive};
5 use rustc_target::spec::{HasTargetSpec, Target};
7 use crate::constant::ConstantCx;
10 pub(crate) fn pointer_ty(tcx: TyCtxt<'_>) -> types::Type {
11 match tcx.data_layout.pointer_size.bits() {
15 bits => bug!("ptr_sized_integer: unknown pointer bit size {}", bits),
19 pub(crate) fn scalar_to_clif_type(tcx: TyCtxt<'_>, scalar: Scalar) -> Type {
21 Primitive::Int(int, _sign) => match int {
22 Integer::I8 => types::I8,
23 Integer::I16 => types::I16,
24 Integer::I32 => types::I32,
25 Integer::I64 => types::I64,
26 Integer::I128 => types::I128,
28 Primitive::F32 => types::F32,
29 Primitive::F64 => types::F64,
30 Primitive::Pointer => pointer_ty(tcx),
34 fn clif_type_from_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<types::Type> {
35 Some(match ty.kind() {
36 ty::Bool => types::I8,
37 ty::Uint(size) => match size {
38 UintTy::U8 => types::I8,
39 UintTy::U16 => types::I16,
40 UintTy::U32 => types::I32,
41 UintTy::U64 => types::I64,
42 UintTy::U128 => types::I128,
43 UintTy::Usize => pointer_ty(tcx),
45 ty::Int(size) => match size {
46 IntTy::I8 => types::I8,
47 IntTy::I16 => types::I16,
48 IntTy::I32 => types::I32,
49 IntTy::I64 => types::I64,
50 IntTy::I128 => types::I128,
51 IntTy::Isize => pointer_ty(tcx),
53 ty::Char => types::I32,
54 ty::Float(size) => match size {
55 FloatTy::F32 => types::F32,
56 FloatTy::F64 => types::F64,
58 ty::FnPtr(_) => pointer_ty(tcx),
59 ty::RawPtr(TypeAndMut { ty: pointee_ty, mutbl: _ }) | ty::Ref(_, pointee_ty, _) => {
60 if has_ptr_meta(tcx, pointee_ty) {
66 ty::Adt(adt_def, _) if adt_def.repr.simd() => {
67 let (element, count) = match &tcx.layout_of(ParamEnv::reveal_all().and(ty)).unwrap().abi
69 Abi::Vector { element, count } => (element.clone(), *count),
73 match scalar_to_clif_type(tcx, element).by(u16::try_from(count).unwrap()) {
74 // Cranelift currently only implements icmp for 128bit vectors.
75 Some(vector_ty) if vector_ty.bits() == 128 => vector_ty,
79 ty::Param(_) => bug!("ty param {:?}", ty),
84 fn clif_pair_type_from_ty<'tcx>(
87 ) -> Option<(types::Type, types::Type)> {
88 Some(match ty.kind() {
89 ty::Tuple(substs) if substs.len() == 2 => {
90 let mut types = substs.types();
91 let a = clif_type_from_ty(tcx, types.next().unwrap())?;
92 let b = clif_type_from_ty(tcx, types.next().unwrap())?;
93 if a.is_vector() || b.is_vector() {
98 ty::RawPtr(TypeAndMut { ty: pointee_ty, mutbl: _ }) | ty::Ref(_, pointee_ty, _) => {
99 if has_ptr_meta(tcx, pointee_ty) {
100 (pointer_ty(tcx), pointer_ty(tcx))
109 /// Is a pointer to this type a fat ptr?
110 pub(crate) fn has_ptr_meta<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> bool {
111 let ptr_ty = tcx.mk_ptr(TypeAndMut { ty, mutbl: rustc_hir::Mutability::Not });
112 match &tcx.layout_of(ParamEnv::reveal_all().and(ptr_ty)).unwrap().abi {
113 Abi::Scalar(_) => false,
114 Abi::ScalarPair(_, _) => true,
115 abi => unreachable!("Abi of ptr to {:?} is {:?}???", ty, abi),
119 pub(crate) fn codegen_icmp_imm(
120 fx: &mut FunctionCx<'_, '_, '_>,
125 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
126 if lhs_ty == types::I128 {
127 // FIXME legalize `icmp_imm.i128` in Cranelift
129 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
130 let (rhs_lsb, rhs_msb) = (rhs as u128 as u64 as i64, (rhs as u128 >> 64) as u64 as i64);
134 let lsb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_lsb, rhs_lsb);
135 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
136 fx.bcx.ins().band(lsb_eq, msb_eq)
139 let lsb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_lsb, rhs_lsb);
140 let msb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_msb, rhs_msb);
141 fx.bcx.ins().bor(lsb_ne, msb_ne)
150 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
151 let lsb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_lsb, rhs_lsb);
152 let msb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_msb, rhs_msb);
154 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
158 let rhs = i64::try_from(rhs).expect("codegen_icmp_imm rhs out of range for <128bit int");
159 fx.bcx.ins().icmp_imm(intcc, lhs, rhs)
163 pub(crate) fn type_min_max_value(
164 bcx: &mut FunctionBuilder<'_>,
167 ) -> (Value, Value) {
168 assert!(ty.is_int());
170 if ty == types::I128 {
172 let min = i128::MIN as u128;
173 let min_lsb = bcx.ins().iconst(types::I64, min as u64 as i64);
174 let min_msb = bcx.ins().iconst(types::I64, (min >> 64) as u64 as i64);
175 let min = bcx.ins().iconcat(min_lsb, min_msb);
177 let max = i128::MAX as u128;
178 let max_lsb = bcx.ins().iconst(types::I64, max as u64 as i64);
179 let max_msb = bcx.ins().iconst(types::I64, (max >> 64) as u64 as i64);
180 let max = bcx.ins().iconcat(max_lsb, max_msb);
184 let min_half = bcx.ins().iconst(types::I64, 0);
185 let min = bcx.ins().iconcat(min_half, min_half);
187 let max_half = bcx.ins().iconst(types::I64, u64::MAX as i64);
188 let max = bcx.ins().iconcat(max_half, max_half);
194 let min = match (ty, signed) {
195 (types::I8, false) | (types::I16, false) | (types::I32, false) | (types::I64, false) => {
198 (types::I8, true) => i64::from(i8::MIN),
199 (types::I16, true) => i64::from(i16::MIN),
200 (types::I32, true) => i64::from(i32::MIN),
201 (types::I64, true) => i64::MIN,
205 let max = match (ty, signed) {
206 (types::I8, false) => i64::from(u8::MAX),
207 (types::I16, false) => i64::from(u16::MAX),
208 (types::I32, false) => i64::from(u32::MAX),
209 (types::I64, false) => u64::MAX as i64,
210 (types::I8, true) => i64::from(i8::MAX),
211 (types::I16, true) => i64::from(i16::MAX),
212 (types::I32, true) => i64::from(i32::MAX),
213 (types::I64, true) => i64::MAX,
217 let (min, max) = (bcx.ins().iconst(ty, min), bcx.ins().iconst(ty, max));
222 pub(crate) fn type_sign(ty: Ty<'_>) -> bool {
224 ty::Ref(..) | ty::RawPtr(..) | ty::FnPtr(..) | ty::Char | ty::Uint(..) | ty::Bool => false,
226 ty::Float(..) => false, // `signed` is unused for floats
227 _ => panic!("{}", ty),
231 pub(crate) struct FunctionCx<'m, 'clif, 'tcx: 'm> {
232 pub(crate) cx: &'clif mut crate::CodegenCx<'tcx>,
233 pub(crate) module: &'m mut dyn Module,
234 pub(crate) tcx: TyCtxt<'tcx>,
235 pub(crate) pointer_type: Type, // Cached from module
236 pub(crate) constants_cx: ConstantCx,
238 pub(crate) instance: Instance<'tcx>,
239 pub(crate) symbol_name: SymbolName<'tcx>,
240 pub(crate) mir: &'tcx Body<'tcx>,
241 pub(crate) fn_abi: Option<FnAbi<'tcx, Ty<'tcx>>>,
243 pub(crate) bcx: FunctionBuilder<'clif>,
244 pub(crate) block_map: IndexVec<BasicBlock, Block>,
245 pub(crate) local_map: IndexVec<Local, CPlace<'tcx>>,
247 /// When `#[track_caller]` is used, the implicit caller location is stored in this variable.
248 pub(crate) caller_location: Option<CValue<'tcx>>,
250 pub(crate) clif_comments: crate::pretty_clif::CommentWriter,
251 pub(crate) source_info_set: indexmap::IndexSet<SourceInfo>,
253 /// This should only be accessed by `CPlace::new_var`.
254 pub(crate) next_ssa_var: u32,
256 pub(crate) inline_asm_index: u32,
259 impl<'tcx> LayoutOf for FunctionCx<'_, '_, 'tcx> {
261 type TyAndLayout = TyAndLayout<'tcx>;
263 fn layout_of(&self, ty: Ty<'tcx>) -> TyAndLayout<'tcx> {
264 RevealAllLayoutCx(self.tcx).layout_of(ty)
268 impl<'tcx> layout::HasTyCtxt<'tcx> for FunctionCx<'_, '_, 'tcx> {
269 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
274 impl<'tcx> rustc_target::abi::HasDataLayout for FunctionCx<'_, '_, 'tcx> {
275 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
276 &self.tcx.data_layout
280 impl<'tcx> layout::HasParamEnv<'tcx> for FunctionCx<'_, '_, 'tcx> {
281 fn param_env(&self) -> ParamEnv<'tcx> {
282 ParamEnv::reveal_all()
286 impl<'tcx> HasTargetSpec for FunctionCx<'_, '_, 'tcx> {
287 fn target_spec(&self) -> &Target {
288 &self.tcx.sess.target
292 impl<'tcx> FunctionCx<'_, '_, 'tcx> {
293 pub(crate) fn monomorphize<T>(&self, value: T) -> T
295 T: TypeFoldable<'tcx> + Copy,
297 self.instance.subst_mir_and_normalize_erasing_regions(
299 ty::ParamEnv::reveal_all(),
304 pub(crate) fn clif_type(&self, ty: Ty<'tcx>) -> Option<Type> {
305 clif_type_from_ty(self.tcx, ty)
308 pub(crate) fn clif_pair_type(&self, ty: Ty<'tcx>) -> Option<(Type, Type)> {
309 clif_pair_type_from_ty(self.tcx, ty)
312 pub(crate) fn get_block(&self, bb: BasicBlock) -> Block {
313 *self.block_map.get(bb).unwrap()
316 pub(crate) fn get_local_place(&mut self, local: Local) -> CPlace<'tcx> {
317 *self.local_map.get(local).unwrap_or_else(|| {
318 panic!("Local {:?} doesn't exist", local);
322 pub(crate) fn set_debug_loc(&mut self, source_info: mir::SourceInfo) {
323 let (index, _) = self.source_info_set.insert_full(source_info);
324 self.bcx.set_srcloc(SourceLoc::new(index as u32));
327 pub(crate) fn get_caller_location(&mut self, span: Span) -> CValue<'tcx> {
328 if let Some(loc) = self.caller_location {
329 // `#[track_caller]` is used; return caller location instead of current location.
333 let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
334 let caller = self.tcx.sess.source_map().lookup_char_pos(topmost.lo());
335 let const_loc = self.tcx.const_caller_location((
336 rustc_span::symbol::Symbol::intern(
337 &caller.file.name.prefer_remapped().to_string_lossy(),
340 caller.col_display as u32 + 1,
342 crate::constant::codegen_const_value(self, const_loc, self.tcx.caller_location_ty())
345 pub(crate) fn triple(&self) -> &target_lexicon::Triple {
346 self.module.isa().triple()
349 pub(crate) fn anonymous_str(&mut self, msg: &str) -> Value {
350 let mut data_ctx = DataContext::new();
351 data_ctx.define(msg.as_bytes().to_vec().into_boxed_slice());
352 let msg_id = self.module.declare_anonymous_data(false, false).unwrap();
354 // Ignore DuplicateDefinition error, as the data will be the same
355 let _ = self.module.define_data(msg_id, &data_ctx);
357 let local_msg_id = self.module.declare_data_in_func(msg_id, self.bcx.func);
358 if self.clif_comments.enabled() {
359 self.add_comment(local_msg_id, msg);
361 self.bcx.ins().global_value(self.pointer_type, local_msg_id)
365 pub(crate) struct RevealAllLayoutCx<'tcx>(pub(crate) TyCtxt<'tcx>);
367 impl<'tcx> LayoutOf for RevealAllLayoutCx<'tcx> {
369 type TyAndLayout = TyAndLayout<'tcx>;
371 fn layout_of(&self, ty: Ty<'tcx>) -> TyAndLayout<'tcx> {
372 assert!(!ty.still_further_specializable());
373 self.0.layout_of(ParamEnv::reveal_all().and(&ty)).unwrap_or_else(|e| {
374 if let layout::LayoutError::SizeOverflow(_) = e {
375 self.0.sess.fatal(&e.to_string())
377 bug!("failed to get layout for `{}`: {}", ty, e)
383 impl<'tcx> layout::HasTyCtxt<'tcx> for RevealAllLayoutCx<'tcx> {
384 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
389 impl<'tcx> rustc_target::abi::HasDataLayout for RevealAllLayoutCx<'tcx> {
390 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
395 impl<'tcx> layout::HasParamEnv<'tcx> for RevealAllLayoutCx<'tcx> {
396 fn param_env(&self) -> ParamEnv<'tcx> {
397 ParamEnv::reveal_all()
401 impl<'tcx> HasTargetSpec for RevealAllLayoutCx<'tcx> {
402 fn target_spec(&self) -> &Target {