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 { ty: pointee_ty, mutbl: _ }) | ty::Ref(_, pointee_ty, _) => {
58 if has_ptr_meta(tcx, pointee_ty) {
64 ty::Adt(adt_def, _) if adt_def.repr.simd() => {
65 let (element, count) = match &tcx.layout_of(ParamEnv::reveal_all().and(ty)).unwrap().abi
67 Abi::Vector { element, count } => (element.clone(), *count),
71 match scalar_to_clif_type(tcx, element).by(u16::try_from(count).unwrap()) {
72 // Cranelift currently only implements icmp for 128bit vectors.
73 Some(vector_ty) if vector_ty.bits() == 128 => vector_ty,
77 ty::Param(_) => bug!("ty param {:?}", ty),
82 fn clif_pair_type_from_ty<'tcx>(
85 ) -> Option<(types::Type, types::Type)> {
86 Some(match ty.kind() {
87 ty::Tuple(substs) if substs.len() == 2 => {
88 let mut types = substs.types();
89 let a = clif_type_from_ty(tcx, types.next().unwrap())?;
90 let b = clif_type_from_ty(tcx, types.next().unwrap())?;
91 if a.is_vector() || b.is_vector() {
96 ty::RawPtr(TypeAndMut { ty: pointee_ty, mutbl: _ }) | ty::Ref(_, pointee_ty, _) => {
97 if has_ptr_meta(tcx, pointee_ty) {
98 (pointer_ty(tcx), pointer_ty(tcx))
107 /// Is a pointer to this type a fat ptr?
108 pub(crate) fn has_ptr_meta<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> bool {
109 let ptr_ty = tcx.mk_ptr(TypeAndMut { ty, mutbl: rustc_hir::Mutability::Not });
110 match &tcx.layout_of(ParamEnv::reveal_all().and(ptr_ty)).unwrap().abi {
111 Abi::Scalar(_) => false,
112 Abi::ScalarPair(_, _) => true,
113 abi => unreachable!("Abi of ptr to {:?} is {:?}???", ty, abi),
117 pub(crate) fn codegen_icmp_imm(
118 fx: &mut FunctionCx<'_, '_, '_>,
123 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
124 if lhs_ty == types::I128 {
125 // FIXME legalize `icmp_imm.i128` in Cranelift
127 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
128 let (rhs_lsb, rhs_msb) = (rhs as u128 as u64 as i64, (rhs as u128 >> 64) as u64 as i64);
132 let lsb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_lsb, rhs_lsb);
133 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
134 fx.bcx.ins().band(lsb_eq, msb_eq)
137 let lsb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_lsb, rhs_lsb);
138 let msb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_msb, rhs_msb);
139 fx.bcx.ins().bor(lsb_ne, msb_ne)
148 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
149 let lsb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_lsb, rhs_lsb);
150 let msb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_msb, rhs_msb);
152 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
156 let rhs = i64::try_from(rhs).expect("codegen_icmp_imm rhs out of range for <128bit int");
157 fx.bcx.ins().icmp_imm(intcc, lhs, rhs)
161 pub(crate) fn type_min_max_value(
162 bcx: &mut FunctionBuilder<'_>,
165 ) -> (Value, Value) {
166 assert!(ty.is_int());
168 if ty == types::I128 {
170 let min = i128::MIN as u128;
171 let min_lsb = bcx.ins().iconst(types::I64, min as u64 as i64);
172 let min_msb = bcx.ins().iconst(types::I64, (min >> 64) as u64 as i64);
173 let min = bcx.ins().iconcat(min_lsb, min_msb);
175 let max = i128::MAX as u128;
176 let max_lsb = bcx.ins().iconst(types::I64, max as u64 as i64);
177 let max_msb = bcx.ins().iconst(types::I64, (max >> 64) as u64 as i64);
178 let max = bcx.ins().iconcat(max_lsb, max_msb);
182 let min_half = bcx.ins().iconst(types::I64, 0);
183 let min = bcx.ins().iconcat(min_half, min_half);
185 let max_half = bcx.ins().iconst(types::I64, u64::MAX as i64);
186 let max = bcx.ins().iconcat(max_half, max_half);
192 let min = match (ty, signed) {
193 (types::I8, false) | (types::I16, false) | (types::I32, false) | (types::I64, false) => {
196 (types::I8, true) => i64::from(i8::MIN),
197 (types::I16, true) => i64::from(i16::MIN),
198 (types::I32, true) => i64::from(i32::MIN),
199 (types::I64, true) => i64::MIN,
203 let max = match (ty, signed) {
204 (types::I8, false) => i64::from(u8::MAX),
205 (types::I16, false) => i64::from(u16::MAX),
206 (types::I32, false) => i64::from(u32::MAX),
207 (types::I64, false) => u64::MAX as i64,
208 (types::I8, true) => i64::from(i8::MAX),
209 (types::I16, true) => i64::from(i16::MAX),
210 (types::I32, true) => i64::from(i32::MAX),
211 (types::I64, true) => i64::MAX,
215 let (min, max) = (bcx.ins().iconst(ty, min), bcx.ins().iconst(ty, max));
220 pub(crate) fn type_sign(ty: Ty<'_>) -> bool {
222 ty::Ref(..) | ty::RawPtr(..) | ty::FnPtr(..) | ty::Char | ty::Uint(..) | ty::Bool => false,
224 ty::Float(..) => false, // `signed` is unused for floats
225 _ => panic!("{}", ty),
229 pub(crate) struct FunctionCx<'m, 'clif, 'tcx> {
230 pub(crate) cx: &'clif mut crate::CodegenCx<'m, 'tcx>,
231 pub(crate) tcx: TyCtxt<'tcx>,
232 pub(crate) pointer_type: Type, // Cached from module
234 pub(crate) instance: Instance<'tcx>,
235 pub(crate) mir: &'tcx Body<'tcx>,
236 pub(crate) fn_abi: Option<FnAbi<'tcx, Ty<'tcx>>>,
238 pub(crate) bcx: FunctionBuilder<'clif>,
239 pub(crate) block_map: IndexVec<BasicBlock, Block>,
240 pub(crate) local_map: IndexVec<Local, CPlace<'tcx>>,
242 /// When `#[track_caller]` is used, the implicit caller location is stored in this variable.
243 pub(crate) caller_location: Option<CValue<'tcx>>,
245 /// See [`crate::optimize::code_layout`] for more information.
246 pub(crate) cold_blocks: EntitySet<Block>,
248 pub(crate) clif_comments: crate::pretty_clif::CommentWriter,
249 pub(crate) source_info_set: indexmap::IndexSet<SourceInfo>,
251 /// This should only be accessed by `CPlace::new_var`.
252 pub(crate) next_ssa_var: u32,
254 pub(crate) inline_asm_index: u32,
257 impl<'tcx> LayoutOf for FunctionCx<'_, '_, 'tcx> {
259 type TyAndLayout = TyAndLayout<'tcx>;
261 fn layout_of(&self, ty: Ty<'tcx>) -> TyAndLayout<'tcx> {
262 RevealAllLayoutCx(self.tcx).layout_of(ty)
266 impl<'tcx> layout::HasTyCtxt<'tcx> for FunctionCx<'_, '_, 'tcx> {
267 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
272 impl<'tcx> rustc_target::abi::HasDataLayout for FunctionCx<'_, '_, 'tcx> {
273 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
274 &self.tcx.data_layout
278 impl<'tcx> layout::HasParamEnv<'tcx> for FunctionCx<'_, '_, 'tcx> {
279 fn param_env(&self) -> ParamEnv<'tcx> {
280 ParamEnv::reveal_all()
284 impl<'tcx> HasTargetSpec for FunctionCx<'_, '_, 'tcx> {
285 fn target_spec(&self) -> &Target {
286 &self.tcx.sess.target
290 impl<'tcx> FunctionCx<'_, '_, 'tcx> {
291 pub(crate) fn monomorphize<T>(&self, value: T) -> T
293 T: TypeFoldable<'tcx> + Copy,
295 self.instance.subst_mir_and_normalize_erasing_regions(
297 ty::ParamEnv::reveal_all(),
302 pub(crate) fn clif_type(&self, ty: Ty<'tcx>) -> Option<Type> {
303 clif_type_from_ty(self.tcx, ty)
306 pub(crate) fn clif_pair_type(&self, ty: Ty<'tcx>) -> Option<(Type, Type)> {
307 clif_pair_type_from_ty(self.tcx, ty)
310 pub(crate) fn get_block(&self, bb: BasicBlock) -> Block {
311 *self.block_map.get(bb).unwrap()
314 pub(crate) fn get_local_place(&mut self, local: Local) -> CPlace<'tcx> {
315 *self.local_map.get(local).unwrap_or_else(|| {
316 panic!("Local {:?} doesn't exist", local);
320 pub(crate) fn set_debug_loc(&mut self, source_info: mir::SourceInfo) {
321 let (index, _) = self.source_info_set.insert_full(source_info);
322 self.bcx.set_srcloc(SourceLoc::new(index as u32));
325 pub(crate) fn get_caller_location(&mut self, span: Span) -> CValue<'tcx> {
326 if let Some(loc) = self.caller_location {
327 // `#[track_caller]` is used; return caller location instead of current location.
331 let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
332 let caller = self.tcx.sess.source_map().lookup_char_pos(topmost.lo());
333 let const_loc = self.tcx.const_caller_location((
334 rustc_span::symbol::Symbol::intern(&caller.file.name.to_string()),
336 caller.col_display as u32 + 1,
338 crate::constant::codegen_const_value(self, const_loc, self.tcx.caller_location_ty())
341 pub(crate) fn triple(&self) -> &target_lexicon::Triple {
342 self.cx.module.isa().triple()
345 pub(crate) fn anonymous_str(&mut self, prefix: &str, msg: &str) -> Value {
346 use std::collections::hash_map::DefaultHasher;
347 use std::hash::{Hash, Hasher};
349 let mut hasher = DefaultHasher::new();
350 msg.hash(&mut hasher);
351 let msg_hash = hasher.finish();
352 let mut data_ctx = DataContext::new();
353 data_ctx.define(msg.as_bytes().to_vec().into_boxed_slice());
357 .declare_data(&format!("__{}_{:08x}", prefix, msg_hash), Linkage::Local, false, false)
360 // Ignore DuplicateDefinition error, as the data will be the same
361 let _ = self.cx.module.define_data(msg_id, &data_ctx);
363 let local_msg_id = self.cx.module.declare_data_in_func(msg_id, self.bcx.func);
364 #[cfg(debug_assertions)]
366 self.add_comment(local_msg_id, msg);
368 self.bcx.ins().global_value(self.pointer_type, local_msg_id)
372 pub(crate) struct RevealAllLayoutCx<'tcx>(pub(crate) TyCtxt<'tcx>);
374 impl<'tcx> LayoutOf for RevealAllLayoutCx<'tcx> {
376 type TyAndLayout = TyAndLayout<'tcx>;
378 fn layout_of(&self, ty: Ty<'tcx>) -> TyAndLayout<'tcx> {
379 assert!(!ty.still_further_specializable());
380 self.0.layout_of(ParamEnv::reveal_all().and(&ty)).unwrap_or_else(|e| {
381 if let layout::LayoutError::SizeOverflow(_) = e {
382 self.0.sess.fatal(&e.to_string())
384 bug!("failed to get layout for `{}`: {}", ty, e)
390 impl<'tcx> layout::HasTyCtxt<'tcx> for RevealAllLayoutCx<'tcx> {
391 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
396 impl<'tcx> rustc_target::abi::HasDataLayout for RevealAllLayoutCx<'tcx> {
397 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
402 impl<'tcx> layout::HasParamEnv<'tcx> for RevealAllLayoutCx<'tcx> {
403 fn param_env(&self) -> ParamEnv<'tcx> {
404 ParamEnv::reveal_all()
408 impl<'tcx> HasTargetSpec for RevealAllLayoutCx<'tcx> {
409 fn target_spec(&self) -> &Target {