1 use rustc_index::vec::IndexVec;
2 use rustc_target::abi::call::FnAbi;
3 use rustc_target::abi::{Integer, Primitive};
4 use rustc_target::spec::{HasTargetSpec, Target};
8 pub(crate) fn pointer_ty(tcx: TyCtxt<'_>) -> types::Type {
9 match tcx.data_layout.pointer_size.bits() {
13 bits => bug!("ptr_sized_integer: unknown pointer bit size {}", bits),
17 pub(crate) fn scalar_to_clif_type(tcx: TyCtxt<'_>, scalar: Scalar) -> Type {
19 Primitive::Int(int, _sign) => match int {
20 Integer::I8 => types::I8,
21 Integer::I16 => types::I16,
22 Integer::I32 => types::I32,
23 Integer::I64 => types::I64,
24 Integer::I128 => types::I128,
26 Primitive::F32 => types::F32,
27 Primitive::F64 => types::F64,
28 Primitive::Pointer => pointer_ty(tcx),
32 fn clif_type_from_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<types::Type> {
33 Some(match ty.kind() {
34 ty::Bool => types::I8,
35 ty::Uint(size) => match size {
36 UintTy::U8 => types::I8,
37 UintTy::U16 => types::I16,
38 UintTy::U32 => types::I32,
39 UintTy::U64 => types::I64,
40 UintTy::U128 => types::I128,
41 UintTy::Usize => pointer_ty(tcx),
43 ty::Int(size) => match size {
44 IntTy::I8 => types::I8,
45 IntTy::I16 => types::I16,
46 IntTy::I32 => types::I32,
47 IntTy::I64 => types::I64,
48 IntTy::I128 => types::I128,
49 IntTy::Isize => pointer_ty(tcx),
51 ty::Char => types::I32,
52 ty::Float(size) => match size {
53 FloatTy::F32 => types::F32,
54 FloatTy::F64 => types::F64,
56 ty::FnPtr(_) => pointer_ty(tcx),
57 ty::RawPtr(TypeAndMut {
61 | ty::Ref(_, pointee_ty, _) => {
62 if has_ptr_meta(tcx, pointee_ty) {
68 ty::Adt(adt_def, _) if adt_def.repr.simd() => {
69 let (element, count) = match &tcx.layout_of(ParamEnv::reveal_all().and(ty)).unwrap().abi
71 Abi::Vector { element, count } => (element.clone(), *count),
75 match scalar_to_clif_type(tcx, element).by(u16::try_from(count).unwrap()) {
76 // Cranelift currently only implements icmp for 128bit vectors.
77 Some(vector_ty) if vector_ty.bits() == 128 => vector_ty,
81 ty::Param(_) => bug!("ty param {:?}", ty),
86 fn clif_pair_type_from_ty<'tcx>(
89 ) -> Option<(types::Type, types::Type)> {
90 Some(match ty.kind() {
91 ty::Tuple(substs) if substs.len() == 2 => {
92 let mut types = substs.types();
93 let a = clif_type_from_ty(tcx, types.next().unwrap())?;
94 let b = clif_type_from_ty(tcx, types.next().unwrap())?;
95 if a.is_vector() || b.is_vector() {
100 ty::RawPtr(TypeAndMut {
104 | ty::Ref(_, pointee_ty, _) => {
105 if has_ptr_meta(tcx, pointee_ty) {
106 (pointer_ty(tcx), pointer_ty(tcx))
115 /// Is a pointer to this type a fat ptr?
116 pub(crate) fn has_ptr_meta<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> bool {
117 let ptr_ty = tcx.mk_ptr(TypeAndMut {
119 mutbl: rustc_hir::Mutability::Not,
122 .layout_of(ParamEnv::reveal_all().and(ptr_ty))
126 Abi::Scalar(_) => false,
127 Abi::ScalarPair(_, _) => true,
128 abi => unreachable!("Abi of ptr to {:?} is {:?}???", ty, abi),
132 pub(crate) fn codegen_icmp_imm(
133 fx: &mut FunctionCx<'_, '_, impl Module>,
138 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
139 if lhs_ty == types::I128 {
140 // FIXME legalize `icmp_imm.i128` in Cranelift
142 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
143 let (rhs_lsb, rhs_msb) = (rhs as u128 as u64 as i64, (rhs as u128 >> 64) as u64 as i64);
147 let lsb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_lsb, rhs_lsb);
148 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
149 fx.bcx.ins().band(lsb_eq, msb_eq)
152 let lsb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_lsb, rhs_lsb);
153 let msb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_msb, rhs_msb);
154 fx.bcx.ins().bor(lsb_ne, msb_ne)
163 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
164 let lsb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_lsb, rhs_lsb);
165 let msb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_msb, rhs_msb);
167 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
171 let rhs = i64::try_from(rhs).expect("codegen_icmp_imm rhs out of range for <128bit int");
172 fx.bcx.ins().icmp_imm(intcc, lhs, rhs)
176 pub(crate) fn type_min_max_value(
177 bcx: &mut FunctionBuilder<'_>,
180 ) -> (Value, Value) {
181 assert!(ty.is_int());
183 if ty == types::I128 {
185 let min = i128::MIN as u128;
186 let min_lsb = bcx.ins().iconst(types::I64, min as u64 as i64);
187 let min_msb = bcx.ins().iconst(types::I64, (min >> 64) as u64 as i64);
188 let min = bcx.ins().iconcat(min_lsb, min_msb);
190 let max = i128::MAX as u128;
191 let max_lsb = bcx.ins().iconst(types::I64, max as u64 as i64);
192 let max_msb = bcx.ins().iconst(types::I64, (max >> 64) as u64 as i64);
193 let max = bcx.ins().iconcat(max_lsb, max_msb);
197 let min_half = bcx.ins().iconst(types::I64, 0);
198 let min = bcx.ins().iconcat(min_half, min_half);
200 let max_half = bcx.ins().iconst(types::I64, u64::MAX as i64);
201 let max = bcx.ins().iconcat(max_half, max_half);
207 let min = match (ty, signed) {
208 (types::I8, false) | (types::I16, false) | (types::I32, false) | (types::I64, false) => {
211 (types::I8, true) => i64::from(i8::MIN),
212 (types::I16, true) => i64::from(i16::MIN),
213 (types::I32, true) => i64::from(i32::MIN),
214 (types::I64, true) => i64::MIN,
218 let max = match (ty, signed) {
219 (types::I8, false) => i64::from(u8::MAX),
220 (types::I16, false) => i64::from(u16::MAX),
221 (types::I32, false) => i64::from(u32::MAX),
222 (types::I64, false) => u64::MAX as i64,
223 (types::I8, true) => i64::from(i8::MAX),
224 (types::I16, true) => i64::from(i16::MAX),
225 (types::I32, true) => i64::from(i32::MAX),
226 (types::I64, true) => i64::MAX,
230 let (min, max) = (bcx.ins().iconst(ty, min), bcx.ins().iconst(ty, max));
235 pub(crate) fn type_sign(ty: Ty<'_>) -> bool {
237 ty::Ref(..) | ty::RawPtr(..) | ty::FnPtr(..) | ty::Char | ty::Uint(..) | ty::Bool => false,
239 ty::Float(..) => false, // `signed` is unused for floats
240 _ => panic!("{}", ty),
244 pub(crate) struct FunctionCx<'clif, 'tcx, M: Module> {
245 pub(crate) cx: &'clif mut crate::CodegenCx<'tcx, M>,
246 pub(crate) tcx: TyCtxt<'tcx>,
247 pub(crate) pointer_type: Type, // Cached from module
249 pub(crate) instance: Instance<'tcx>,
250 pub(crate) mir: &'tcx Body<'tcx>,
251 pub(crate) fn_abi: Option<FnAbi<'tcx, Ty<'tcx>>>,
253 pub(crate) bcx: FunctionBuilder<'clif>,
254 pub(crate) block_map: IndexVec<BasicBlock, Block>,
255 pub(crate) local_map: IndexVec<Local, CPlace<'tcx>>,
257 /// When `#[track_caller]` is used, the implicit caller location is stored in this variable.
258 pub(crate) caller_location: Option<CValue<'tcx>>,
260 /// See [`crate::optimize::code_layout`] for more information.
261 pub(crate) cold_blocks: EntitySet<Block>,
263 pub(crate) clif_comments: crate::pretty_clif::CommentWriter,
264 pub(crate) source_info_set: indexmap::IndexSet<SourceInfo>,
266 /// This should only be accessed by `CPlace::new_var`.
267 pub(crate) next_ssa_var: u32,
269 pub(crate) inline_asm_index: u32,
272 impl<'tcx, M: Module> LayoutOf for FunctionCx<'_, 'tcx, M> {
274 type TyAndLayout = TyAndLayout<'tcx>;
276 fn layout_of(&self, ty: Ty<'tcx>) -> TyAndLayout<'tcx> {
277 RevealAllLayoutCx(self.tcx).layout_of(ty)
281 impl<'tcx, M: Module> layout::HasTyCtxt<'tcx> for FunctionCx<'_, 'tcx, M> {
282 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
287 impl<'tcx, M: Module> rustc_target::abi::HasDataLayout for FunctionCx<'_, 'tcx, M> {
288 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
289 &self.tcx.data_layout
293 impl<'tcx, M: Module> layout::HasParamEnv<'tcx> for FunctionCx<'_, 'tcx, M> {
294 fn param_env(&self) -> ParamEnv<'tcx> {
295 ParamEnv::reveal_all()
299 impl<'tcx, M: Module> HasTargetSpec for FunctionCx<'_, 'tcx, M> {
300 fn target_spec(&self) -> &Target {
301 &self.tcx.sess.target
305 impl<'tcx, M: Module> FunctionCx<'_, 'tcx, M> {
306 pub(crate) fn monomorphize<T>(&self, value: T) -> T
308 T: TypeFoldable<'tcx> + Copy,
310 self.instance.subst_mir_and_normalize_erasing_regions(
312 ty::ParamEnv::reveal_all(),
317 pub(crate) fn clif_type(&self, ty: Ty<'tcx>) -> Option<Type> {
318 clif_type_from_ty(self.tcx, ty)
321 pub(crate) fn clif_pair_type(&self, ty: Ty<'tcx>) -> Option<(Type, Type)> {
322 clif_pair_type_from_ty(self.tcx, ty)
325 pub(crate) fn get_block(&self, bb: BasicBlock) -> Block {
326 *self.block_map.get(bb).unwrap()
329 pub(crate) fn get_local_place(&mut self, local: Local) -> CPlace<'tcx> {
330 *self.local_map.get(local).unwrap_or_else(|| {
331 panic!("Local {:?} doesn't exist", local);
335 pub(crate) fn set_debug_loc(&mut self, source_info: mir::SourceInfo) {
336 let (index, _) = self.source_info_set.insert_full(source_info);
337 self.bcx.set_srcloc(SourceLoc::new(index as u32));
340 pub(crate) fn get_caller_location(&mut self, span: Span) -> CValue<'tcx> {
341 if let Some(loc) = self.caller_location {
342 // `#[track_caller]` is used; return caller location instead of current location.
346 let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
347 let caller = self.tcx.sess.source_map().lookup_char_pos(topmost.lo());
348 let const_loc = self.tcx.const_caller_location((
349 rustc_span::symbol::Symbol::intern(&caller.file.name.to_string()),
351 caller.col_display as u32 + 1,
353 crate::constant::codegen_const_value(self, const_loc, self.tcx.caller_location_ty())
356 pub(crate) fn triple(&self) -> &target_lexicon::Triple {
357 self.cx.module.isa().triple()
360 pub(crate) fn anonymous_str(&mut self, prefix: &str, msg: &str) -> Value {
361 use std::collections::hash_map::DefaultHasher;
362 use std::hash::{Hash, Hasher};
364 let mut hasher = DefaultHasher::new();
365 msg.hash(&mut hasher);
366 let msg_hash = hasher.finish();
367 let mut data_ctx = DataContext::new();
368 data_ctx.define(msg.as_bytes().to_vec().into_boxed_slice());
373 &format!("__{}_{:08x}", prefix, msg_hash),
380 // Ignore DuplicateDefinition error, as the data will be the same
381 let _ = self.cx.module.define_data(msg_id, &data_ctx);
383 let local_msg_id = self.cx.module.declare_data_in_func(msg_id, self.bcx.func);
384 #[cfg(debug_assertions)]
386 self.add_comment(local_msg_id, msg);
388 self.bcx.ins().global_value(self.pointer_type, local_msg_id)
392 pub(crate) struct RevealAllLayoutCx<'tcx>(pub(crate) TyCtxt<'tcx>);
394 impl<'tcx> LayoutOf for RevealAllLayoutCx<'tcx> {
396 type TyAndLayout = TyAndLayout<'tcx>;
398 fn layout_of(&self, ty: Ty<'tcx>) -> TyAndLayout<'tcx> {
399 assert!(!ty.still_further_specializable());
401 .layout_of(ParamEnv::reveal_all().and(&ty))
402 .unwrap_or_else(|e| {
403 if let layout::LayoutError::SizeOverflow(_) = e {
404 self.0.sess.fatal(&e.to_string())
406 bug!("failed to get layout for `{}`: {}", ty, e)
412 impl<'tcx> layout::HasTyCtxt<'tcx> for RevealAllLayoutCx<'tcx> {
413 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
418 impl<'tcx> rustc_target::abi::HasDataLayout for RevealAllLayoutCx<'tcx> {
419 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
424 impl<'tcx> layout::HasParamEnv<'tcx> for RevealAllLayoutCx<'tcx> {
425 fn param_env(&self) -> ParamEnv<'tcx> {
426 ParamEnv::reveal_all()
430 impl<'tcx> HasTargetSpec for RevealAllLayoutCx<'tcx> {
431 fn target_spec(&self) -> &Target {