1 use rustc_index::vec::IndexVec;
2 use rustc_middle::ty::layout::LayoutError;
3 use rustc_middle::ty::SymbolName;
4 use rustc_target::abi::call::FnAbi;
5 use rustc_target::abi::{Integer, Primitive};
6 use rustc_target::spec::{HasTargetSpec, Target};
8 use crate::constant::ConstantCx;
11 pub(crate) fn pointer_ty(tcx: TyCtxt<'_>) -> types::Type {
12 match tcx.data_layout.pointer_size.bits() {
16 bits => bug!("ptr_sized_integer: unknown pointer bit size {}", bits),
20 pub(crate) fn scalar_to_clif_type(tcx: TyCtxt<'_>, scalar: Scalar) -> Type {
22 Primitive::Int(int, _sign) => match int {
23 Integer::I8 => types::I8,
24 Integer::I16 => types::I16,
25 Integer::I32 => types::I32,
26 Integer::I64 => types::I64,
27 Integer::I128 => types::I128,
29 Primitive::F32 => types::F32,
30 Primitive::F64 => types::F64,
31 Primitive::Pointer => pointer_ty(tcx),
35 fn clif_type_from_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<types::Type> {
36 Some(match ty.kind() {
37 ty::Bool => types::I8,
38 ty::Uint(size) => match size {
39 UintTy::U8 => types::I8,
40 UintTy::U16 => types::I16,
41 UintTy::U32 => types::I32,
42 UintTy::U64 => types::I64,
43 UintTy::U128 => types::I128,
44 UintTy::Usize => pointer_ty(tcx),
46 ty::Int(size) => match size {
47 IntTy::I8 => types::I8,
48 IntTy::I16 => types::I16,
49 IntTy::I32 => types::I32,
50 IntTy::I64 => types::I64,
51 IntTy::I128 => types::I128,
52 IntTy::Isize => pointer_ty(tcx),
54 ty::Char => types::I32,
55 ty::Float(size) => match size {
56 FloatTy::F32 => types::F32,
57 FloatTy::F64 => types::F64,
59 ty::FnPtr(_) => pointer_ty(tcx),
60 ty::RawPtr(TypeAndMut { ty: pointee_ty, mutbl: _ }) | ty::Ref(_, pointee_ty, _) => {
61 if has_ptr_meta(tcx, pointee_ty) {
67 ty::Adt(adt_def, _) if adt_def.repr.simd() => {
68 let (element, count) = match &tcx.layout_of(ParamEnv::reveal_all().and(ty)).unwrap().abi
70 Abi::Vector { element, count } => (element.clone(), *count),
74 match scalar_to_clif_type(tcx, element).by(u16::try_from(count).unwrap()) {
75 // Cranelift currently only implements icmp for 128bit vectors.
76 Some(vector_ty) if vector_ty.bits() == 128 => vector_ty,
80 ty::Param(_) => bug!("ty param {:?}", ty),
85 fn clif_pair_type_from_ty<'tcx>(
88 ) -> Option<(types::Type, types::Type)> {
89 Some(match ty.kind() {
90 ty::Tuple(substs) if substs.len() == 2 => {
91 let mut types = substs.types();
92 let a = clif_type_from_ty(tcx, types.next().unwrap())?;
93 let b = clif_type_from_ty(tcx, types.next().unwrap())?;
94 if a.is_vector() || b.is_vector() {
99 ty::RawPtr(TypeAndMut { ty: pointee_ty, mutbl: _ }) | ty::Ref(_, pointee_ty, _) => {
100 if has_ptr_meta(tcx, pointee_ty) {
101 (pointer_ty(tcx), pointer_ty(tcx))
110 /// Is a pointer to this type a fat ptr?
111 pub(crate) fn has_ptr_meta<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> bool {
112 let ptr_ty = tcx.mk_ptr(TypeAndMut { ty, mutbl: rustc_hir::Mutability::Not });
113 match &tcx.layout_of(ParamEnv::reveal_all().and(ptr_ty)).unwrap().abi {
114 Abi::Scalar(_) => false,
115 Abi::ScalarPair(_, _) => true,
116 abi => unreachable!("Abi of ptr to {:?} is {:?}???", ty, abi),
120 pub(crate) fn codegen_icmp_imm(
121 fx: &mut FunctionCx<'_, '_, '_>,
126 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
127 if lhs_ty == types::I128 {
128 // FIXME legalize `icmp_imm.i128` in Cranelift
130 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
131 let (rhs_lsb, rhs_msb) = (rhs as u128 as u64 as i64, (rhs as u128 >> 64) as u64 as i64);
135 let lsb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_lsb, rhs_lsb);
136 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
137 fx.bcx.ins().band(lsb_eq, msb_eq)
140 let lsb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_lsb, rhs_lsb);
141 let msb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_msb, rhs_msb);
142 fx.bcx.ins().bor(lsb_ne, msb_ne)
151 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
152 let lsb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_lsb, rhs_lsb);
153 let msb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_msb, rhs_msb);
155 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
159 let rhs = i64::try_from(rhs).expect("codegen_icmp_imm rhs out of range for <128bit int");
160 fx.bcx.ins().icmp_imm(intcc, lhs, rhs)
164 pub(crate) fn type_min_max_value(
165 bcx: &mut FunctionBuilder<'_>,
168 ) -> (Value, Value) {
169 assert!(ty.is_int());
171 if ty == types::I128 {
173 let min = i128::MIN as u128;
174 let min_lsb = bcx.ins().iconst(types::I64, min as u64 as i64);
175 let min_msb = bcx.ins().iconst(types::I64, (min >> 64) as u64 as i64);
176 let min = bcx.ins().iconcat(min_lsb, min_msb);
178 let max = i128::MAX as u128;
179 let max_lsb = bcx.ins().iconst(types::I64, max as u64 as i64);
180 let max_msb = bcx.ins().iconst(types::I64, (max >> 64) as u64 as i64);
181 let max = bcx.ins().iconcat(max_lsb, max_msb);
185 let min_half = bcx.ins().iconst(types::I64, 0);
186 let min = bcx.ins().iconcat(min_half, min_half);
188 let max_half = bcx.ins().iconst(types::I64, u64::MAX as i64);
189 let max = bcx.ins().iconcat(max_half, max_half);
195 let min = match (ty, signed) {
196 (types::I8, false) | (types::I16, false) | (types::I32, false) | (types::I64, false) => {
199 (types::I8, true) => i64::from(i8::MIN),
200 (types::I16, true) => i64::from(i16::MIN),
201 (types::I32, true) => i64::from(i32::MIN),
202 (types::I64, true) => i64::MIN,
206 let max = match (ty, signed) {
207 (types::I8, false) => i64::from(u8::MAX),
208 (types::I16, false) => i64::from(u16::MAX),
209 (types::I32, false) => i64::from(u32::MAX),
210 (types::I64, false) => u64::MAX as i64,
211 (types::I8, true) => i64::from(i8::MAX),
212 (types::I16, true) => i64::from(i16::MAX),
213 (types::I32, true) => i64::from(i32::MAX),
214 (types::I64, true) => i64::MAX,
218 let (min, max) = (bcx.ins().iconst(ty, min), bcx.ins().iconst(ty, max));
223 pub(crate) fn type_sign(ty: Ty<'_>) -> bool {
225 ty::Ref(..) | ty::RawPtr(..) | ty::FnPtr(..) | ty::Char | ty::Uint(..) | ty::Bool => false,
227 ty::Float(..) => false, // `signed` is unused for floats
228 _ => panic!("{}", ty),
232 pub(crate) struct FunctionCx<'m, 'clif, 'tcx: 'm> {
233 pub(crate) cx: &'clif mut crate::CodegenCx<'tcx>,
234 pub(crate) module: &'m mut dyn Module,
235 pub(crate) tcx: TyCtxt<'tcx>,
236 pub(crate) pointer_type: Type, // Cached from module
237 pub(crate) constants_cx: ConstantCx,
239 pub(crate) instance: Instance<'tcx>,
240 pub(crate) symbol_name: SymbolName<'tcx>,
241 pub(crate) mir: &'tcx Body<'tcx>,
242 pub(crate) fn_abi: Option<FnAbi<'tcx, Ty<'tcx>>>,
244 pub(crate) bcx: FunctionBuilder<'clif>,
245 pub(crate) block_map: IndexVec<BasicBlock, Block>,
246 pub(crate) local_map: IndexVec<Local, CPlace<'tcx>>,
248 /// When `#[track_caller]` is used, the implicit caller location is stored in this variable.
249 pub(crate) caller_location: Option<CValue<'tcx>>,
251 pub(crate) clif_comments: crate::pretty_clif::CommentWriter,
252 pub(crate) source_info_set: indexmap::IndexSet<SourceInfo>,
254 /// This should only be accessed by `CPlace::new_var`.
255 pub(crate) next_ssa_var: u32,
257 pub(crate) inline_asm_index: u32,
260 impl<'tcx> LayoutOf<'tcx> for FunctionCx<'_, '_, 'tcx> {
261 type LayoutOfResult = TyAndLayout<'tcx>;
264 fn handle_layout_err(&self, err: LayoutError<'tcx>, span: Span, ty: Ty<'tcx>) -> ! {
265 RevealAllLayoutCx(self.tcx).handle_layout_err(err, span, ty)
269 impl<'tcx> layout::HasTyCtxt<'tcx> for FunctionCx<'_, '_, 'tcx> {
270 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
275 impl<'tcx> rustc_target::abi::HasDataLayout for FunctionCx<'_, '_, 'tcx> {
276 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
277 &self.tcx.data_layout
281 impl<'tcx> layout::HasParamEnv<'tcx> for FunctionCx<'_, '_, 'tcx> {
282 fn param_env(&self) -> ParamEnv<'tcx> {
283 ParamEnv::reveal_all()
287 impl<'tcx> HasTargetSpec for FunctionCx<'_, '_, 'tcx> {
288 fn target_spec(&self) -> &Target {
289 &self.tcx.sess.target
293 impl<'tcx> FunctionCx<'_, '_, 'tcx> {
294 pub(crate) fn monomorphize<T>(&self, value: T) -> T
296 T: TypeFoldable<'tcx> + Copy,
298 self.instance.subst_mir_and_normalize_erasing_regions(
300 ty::ParamEnv::reveal_all(),
305 pub(crate) fn clif_type(&self, ty: Ty<'tcx>) -> Option<Type> {
306 clif_type_from_ty(self.tcx, ty)
309 pub(crate) fn clif_pair_type(&self, ty: Ty<'tcx>) -> Option<(Type, Type)> {
310 clif_pair_type_from_ty(self.tcx, ty)
313 pub(crate) fn get_block(&self, bb: BasicBlock) -> Block {
314 *self.block_map.get(bb).unwrap()
317 pub(crate) fn get_local_place(&mut self, local: Local) -> CPlace<'tcx> {
318 *self.local_map.get(local).unwrap_or_else(|| {
319 panic!("Local {:?} doesn't exist", local);
323 pub(crate) fn set_debug_loc(&mut self, source_info: mir::SourceInfo) {
324 let (index, _) = self.source_info_set.insert_full(source_info);
325 self.bcx.set_srcloc(SourceLoc::new(index as u32));
328 pub(crate) fn get_caller_location(&mut self, span: Span) -> CValue<'tcx> {
329 if let Some(loc) = self.caller_location {
330 // `#[track_caller]` is used; return caller location instead of current location.
334 let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
335 let caller = self.tcx.sess.source_map().lookup_char_pos(topmost.lo());
336 let const_loc = self.tcx.const_caller_location((
337 rustc_span::symbol::Symbol::intern(
338 &caller.file.name.prefer_remapped().to_string_lossy(),
341 caller.col_display as u32 + 1,
343 crate::constant::codegen_const_value(self, const_loc, self.tcx.caller_location_ty())
346 pub(crate) fn triple(&self) -> &target_lexicon::Triple {
347 self.module.isa().triple()
350 pub(crate) fn anonymous_str(&mut self, msg: &str) -> Value {
351 let mut data_ctx = DataContext::new();
352 data_ctx.define(msg.as_bytes().to_vec().into_boxed_slice());
353 let msg_id = self.module.declare_anonymous_data(false, false).unwrap();
355 // Ignore DuplicateDefinition error, as the data will be the same
356 let _ = self.module.define_data(msg_id, &data_ctx);
358 let local_msg_id = self.module.declare_data_in_func(msg_id, self.bcx.func);
359 if self.clif_comments.enabled() {
360 self.add_comment(local_msg_id, msg);
362 self.bcx.ins().global_value(self.pointer_type, local_msg_id)
366 pub(crate) struct RevealAllLayoutCx<'tcx>(pub(crate) TyCtxt<'tcx>);
368 impl<'tcx> LayoutOf<'tcx> for RevealAllLayoutCx<'tcx> {
369 type LayoutOfResult = TyAndLayout<'tcx>;
372 fn handle_layout_err(&self, err: LayoutError<'tcx>, span: Span, ty: Ty<'tcx>) -> ! {
373 if let layout::LayoutError::SizeOverflow(_) = err {
374 self.0.sess.span_fatal(span, &err.to_string())
376 span_bug!(span, "failed to get layout for `{}`: {}", ty, err)
381 impl<'tcx> layout::HasTyCtxt<'tcx> for RevealAllLayoutCx<'tcx> {
382 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
387 impl<'tcx> rustc_target::abi::HasDataLayout for RevealAllLayoutCx<'tcx> {
388 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
393 impl<'tcx> layout::HasParamEnv<'tcx> for RevealAllLayoutCx<'tcx> {
394 fn param_env(&self) -> ParamEnv<'tcx> {
395 ParamEnv::reveal_all()
399 impl<'tcx> HasTargetSpec for RevealAllLayoutCx<'tcx> {
400 fn target_spec(&self) -> &Target {