1 use cranelift_codegen::isa::TargetFrontendConfig;
2 use rustc_index::vec::IndexVec;
3 use rustc_middle::ty::layout::{
4 FnAbiError, FnAbiOfHelpers, FnAbiRequest, LayoutError, LayoutOfHelpers,
6 use rustc_middle::ty::SymbolName;
7 use rustc_target::abi::call::FnAbi;
8 use rustc_target::abi::{Integer, Primitive};
9 use rustc_target::spec::{HasTargetSpec, Target};
11 use crate::constant::ConstantCx;
12 use crate::prelude::*;
14 pub(crate) fn pointer_ty(tcx: TyCtxt<'_>) -> types::Type {
15 match tcx.data_layout.pointer_size.bits() {
19 bits => bug!("ptr_sized_integer: unknown pointer bit size {}", bits),
23 pub(crate) fn scalar_to_clif_type(tcx: TyCtxt<'_>, scalar: Scalar) -> Type {
25 Primitive::Int(int, _sign) => match int {
26 Integer::I8 => types::I8,
27 Integer::I16 => types::I16,
28 Integer::I32 => types::I32,
29 Integer::I64 => types::I64,
30 Integer::I128 => types::I128,
32 Primitive::F32 => types::F32,
33 Primitive::F64 => types::F64,
34 Primitive::Pointer => pointer_ty(tcx),
38 fn clif_type_from_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<types::Type> {
39 Some(match ty.kind() {
40 ty::Bool => types::I8,
41 ty::Uint(size) => match size {
42 UintTy::U8 => types::I8,
43 UintTy::U16 => types::I16,
44 UintTy::U32 => types::I32,
45 UintTy::U64 => types::I64,
46 UintTy::U128 => types::I128,
47 UintTy::Usize => pointer_ty(tcx),
49 ty::Int(size) => match size {
50 IntTy::I8 => types::I8,
51 IntTy::I16 => types::I16,
52 IntTy::I32 => types::I32,
53 IntTy::I64 => types::I64,
54 IntTy::I128 => types::I128,
55 IntTy::Isize => pointer_ty(tcx),
57 ty::Char => types::I32,
58 ty::Float(size) => match size {
59 FloatTy::F32 => types::F32,
60 FloatTy::F64 => types::F64,
62 ty::FnPtr(_) => pointer_ty(tcx),
63 ty::RawPtr(TypeAndMut { ty: pointee_ty, mutbl: _ }) | ty::Ref(_, pointee_ty, _) => {
64 if has_ptr_meta(tcx, *pointee_ty) {
70 ty::Adt(adt_def, _) if adt_def.repr().simd() => {
71 let (element, count) = match &tcx.layout_of(ParamEnv::reveal_all().and(ty)).unwrap().abi
73 Abi::Vector { element, count } => (element.clone(), *count),
77 match scalar_to_clif_type(tcx, element).by(u16::try_from(count).unwrap()) {
78 // Cranelift currently only implements icmp for 128bit vectors.
79 Some(vector_ty) if vector_ty.bits() == 128 => vector_ty,
83 ty::Param(_) => bug!("ty param {:?}", ty),
88 fn clif_pair_type_from_ty<'tcx>(
91 ) -> Option<(types::Type, types::Type)> {
92 Some(match ty.kind() {
93 ty::Tuple(types) if types.len() == 2 => {
94 let a = clif_type_from_ty(tcx, types[0])?;
95 let b = clif_type_from_ty(tcx, types[1])?;
96 if a.is_vector() || b.is_vector() {
101 ty::RawPtr(TypeAndMut { ty: pointee_ty, mutbl: _ }) | ty::Ref(_, pointee_ty, _) => {
102 if has_ptr_meta(tcx, *pointee_ty) {
103 (pointer_ty(tcx), pointer_ty(tcx))
112 /// Is a pointer to this type a fat ptr?
113 pub(crate) fn has_ptr_meta<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> bool {
114 let ptr_ty = tcx.mk_ptr(TypeAndMut { ty, mutbl: rustc_hir::Mutability::Not });
115 match &tcx.layout_of(ParamEnv::reveal_all().and(ptr_ty)).unwrap().abi {
116 Abi::Scalar(_) => false,
117 Abi::ScalarPair(_, _) => true,
118 abi => unreachable!("Abi of ptr to {:?} is {:?}???", ty, abi),
122 pub(crate) fn codegen_icmp_imm(
123 fx: &mut FunctionCx<'_, '_, '_>,
128 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
129 if lhs_ty == types::I128 {
130 // FIXME legalize `icmp_imm.i128` in Cranelift
132 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
133 let (rhs_lsb, rhs_msb) = (rhs as u128 as u64 as i64, (rhs as u128 >> 64) as u64 as i64);
137 let lsb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_lsb, rhs_lsb);
138 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
139 fx.bcx.ins().band(lsb_eq, msb_eq)
142 let lsb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_lsb, rhs_lsb);
143 let msb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_msb, rhs_msb);
144 fx.bcx.ins().bor(lsb_ne, msb_ne)
153 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
154 let lsb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_lsb, rhs_lsb);
155 let msb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_msb, rhs_msb);
157 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
161 let rhs = i64::try_from(rhs).expect("codegen_icmp_imm rhs out of range for <128bit int");
162 fx.bcx.ins().icmp_imm(intcc, lhs, rhs)
166 pub(crate) fn type_min_max_value(
167 bcx: &mut FunctionBuilder<'_>,
170 ) -> (Value, Value) {
171 assert!(ty.is_int());
173 if ty == types::I128 {
175 let min = i128::MIN as u128;
176 let min_lsb = bcx.ins().iconst(types::I64, min as u64 as i64);
177 let min_msb = bcx.ins().iconst(types::I64, (min >> 64) as u64 as i64);
178 let min = bcx.ins().iconcat(min_lsb, min_msb);
180 let max = i128::MAX as u128;
181 let max_lsb = bcx.ins().iconst(types::I64, max as u64 as i64);
182 let max_msb = bcx.ins().iconst(types::I64, (max >> 64) as u64 as i64);
183 let max = bcx.ins().iconcat(max_lsb, max_msb);
187 let min_half = bcx.ins().iconst(types::I64, 0);
188 let min = bcx.ins().iconcat(min_half, min_half);
190 let max_half = bcx.ins().iconst(types::I64, u64::MAX as i64);
191 let max = bcx.ins().iconcat(max_half, max_half);
197 let min = match (ty, signed) {
198 (types::I8, false) | (types::I16, false) | (types::I32, false) | (types::I64, false) => {
201 (types::I8, true) => i64::from(i8::MIN),
202 (types::I16, true) => i64::from(i16::MIN),
203 (types::I32, true) => i64::from(i32::MIN),
204 (types::I64, true) => i64::MIN,
208 let max = match (ty, signed) {
209 (types::I8, false) => i64::from(u8::MAX),
210 (types::I16, false) => i64::from(u16::MAX),
211 (types::I32, false) => i64::from(u32::MAX),
212 (types::I64, false) => u64::MAX as i64,
213 (types::I8, true) => i64::from(i8::MAX),
214 (types::I16, true) => i64::from(i16::MAX),
215 (types::I32, true) => i64::from(i32::MAX),
216 (types::I64, true) => i64::MAX,
220 let (min, max) = (bcx.ins().iconst(ty, min), bcx.ins().iconst(ty, max));
225 pub(crate) fn type_sign(ty: Ty<'_>) -> bool {
227 ty::Ref(..) | ty::RawPtr(..) | ty::FnPtr(..) | ty::Char | ty::Uint(..) | ty::Bool => false,
229 ty::Float(..) => false, // `signed` is unused for floats
230 _ => panic!("{}", ty),
234 pub(crate) struct FunctionCx<'m, 'clif, 'tcx: 'm> {
235 pub(crate) cx: &'clif mut crate::CodegenCx<'tcx>,
236 pub(crate) module: &'m mut dyn Module,
237 pub(crate) tcx: TyCtxt<'tcx>,
238 pub(crate) target_config: TargetFrontendConfig, // Cached from module
239 pub(crate) pointer_type: Type, // Cached from module
240 pub(crate) constants_cx: ConstantCx,
242 pub(crate) instance: Instance<'tcx>,
243 pub(crate) symbol_name: SymbolName<'tcx>,
244 pub(crate) mir: &'tcx Body<'tcx>,
245 pub(crate) fn_abi: Option<&'tcx FnAbi<'tcx, Ty<'tcx>>>,
247 pub(crate) bcx: FunctionBuilder<'clif>,
248 pub(crate) block_map: IndexVec<BasicBlock, Block>,
249 pub(crate) local_map: IndexVec<Local, CPlace<'tcx>>,
251 /// When `#[track_caller]` is used, the implicit caller location is stored in this variable.
252 pub(crate) caller_location: Option<CValue<'tcx>>,
254 pub(crate) clif_comments: crate::pretty_clif::CommentWriter,
255 pub(crate) source_info_set: indexmap::IndexSet<SourceInfo>,
257 /// This should only be accessed by `CPlace::new_var`.
258 pub(crate) next_ssa_var: u32,
261 impl<'tcx> LayoutOfHelpers<'tcx> for FunctionCx<'_, '_, 'tcx> {
262 type LayoutOfResult = TyAndLayout<'tcx>;
265 fn handle_layout_err(&self, err: LayoutError<'tcx>, span: Span, ty: Ty<'tcx>) -> ! {
266 RevealAllLayoutCx(self.tcx).handle_layout_err(err, span, ty)
270 impl<'tcx> FnAbiOfHelpers<'tcx> for FunctionCx<'_, '_, 'tcx> {
271 type FnAbiOfResult = &'tcx FnAbi<'tcx, Ty<'tcx>>;
274 fn handle_fn_abi_err(
276 err: FnAbiError<'tcx>,
278 fn_abi_request: FnAbiRequest<'tcx>,
280 RevealAllLayoutCx(self.tcx).handle_fn_abi_err(err, span, fn_abi_request)
284 impl<'tcx> layout::HasTyCtxt<'tcx> for FunctionCx<'_, '_, 'tcx> {
285 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
290 impl<'tcx> rustc_target::abi::HasDataLayout for FunctionCx<'_, '_, 'tcx> {
291 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
292 &self.tcx.data_layout
296 impl<'tcx> layout::HasParamEnv<'tcx> for FunctionCx<'_, '_, 'tcx> {
297 fn param_env(&self) -> ParamEnv<'tcx> {
298 ParamEnv::reveal_all()
302 impl<'tcx> HasTargetSpec for FunctionCx<'_, '_, 'tcx> {
303 fn target_spec(&self) -> &Target {
304 &self.tcx.sess.target
308 impl<'tcx> FunctionCx<'_, '_, 'tcx> {
309 pub(crate) fn monomorphize<T>(&self, value: T) -> T
311 T: TypeFoldable<'tcx> + Copy,
313 self.instance.subst_mir_and_normalize_erasing_regions(
315 ty::ParamEnv::reveal_all(),
320 pub(crate) fn clif_type(&self, ty: Ty<'tcx>) -> Option<Type> {
321 clif_type_from_ty(self.tcx, ty)
324 pub(crate) fn clif_pair_type(&self, ty: Ty<'tcx>) -> Option<(Type, Type)> {
325 clif_pair_type_from_ty(self.tcx, ty)
328 pub(crate) fn get_block(&self, bb: BasicBlock) -> Block {
329 *self.block_map.get(bb).unwrap()
332 pub(crate) fn get_local_place(&mut self, local: Local) -> CPlace<'tcx> {
333 *self.local_map.get(local).unwrap_or_else(|| {
334 panic!("Local {:?} doesn't exist", local);
338 pub(crate) fn set_debug_loc(&mut self, source_info: mir::SourceInfo) {
339 let (index, _) = self.source_info_set.insert_full(source_info);
340 self.bcx.set_srcloc(SourceLoc::new(index as u32));
343 pub(crate) fn get_caller_location(&mut self, span: Span) -> CValue<'tcx> {
344 if let Some(loc) = self.caller_location {
345 // `#[track_caller]` is used; return caller location instead of current location.
349 let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
350 let caller = self.tcx.sess.source_map().lookup_char_pos(topmost.lo());
351 let const_loc = self.tcx.const_caller_location((
352 rustc_span::symbol::Symbol::intern(
353 &caller.file.name.prefer_remapped().to_string_lossy(),
356 caller.col_display as u32 + 1,
358 crate::constant::codegen_const_value(self, const_loc, self.tcx.caller_location_ty())
361 pub(crate) fn anonymous_str(&mut self, msg: &str) -> Value {
362 let mut data_ctx = DataContext::new();
363 data_ctx.define(msg.as_bytes().to_vec().into_boxed_slice());
364 let msg_id = self.module.declare_anonymous_data(false, false).unwrap();
366 // Ignore DuplicateDefinition error, as the data will be the same
367 let _ = self.module.define_data(msg_id, &data_ctx);
369 let local_msg_id = self.module.declare_data_in_func(msg_id, self.bcx.func);
370 if self.clif_comments.enabled() {
371 self.add_comment(local_msg_id, msg);
373 self.bcx.ins().global_value(self.pointer_type, local_msg_id)
377 pub(crate) struct RevealAllLayoutCx<'tcx>(pub(crate) TyCtxt<'tcx>);
379 impl<'tcx> LayoutOfHelpers<'tcx> for RevealAllLayoutCx<'tcx> {
380 type LayoutOfResult = TyAndLayout<'tcx>;
383 fn handle_layout_err(&self, err: LayoutError<'tcx>, span: Span, ty: Ty<'tcx>) -> ! {
384 if let layout::LayoutError::SizeOverflow(_) = err {
385 self.0.sess.span_fatal(span, &err.to_string())
387 span_bug!(span, "failed to get layout for `{}`: {}", ty, err)
392 impl<'tcx> FnAbiOfHelpers<'tcx> for RevealAllLayoutCx<'tcx> {
393 type FnAbiOfResult = &'tcx FnAbi<'tcx, Ty<'tcx>>;
396 fn handle_fn_abi_err(
398 err: FnAbiError<'tcx>,
400 fn_abi_request: FnAbiRequest<'tcx>,
402 if let FnAbiError::Layout(LayoutError::SizeOverflow(_)) = err {
403 self.0.sess.span_fatal(span, &err.to_string())
405 match fn_abi_request {
406 FnAbiRequest::OfFnPtr { sig, extra_args } => {
409 "`fn_abi_of_fn_ptr({}, {:?})` failed: {}",
415 FnAbiRequest::OfInstance { instance, extra_args } => {
418 "`fn_abi_of_instance({}, {:?})` failed: {}",
429 impl<'tcx> layout::HasTyCtxt<'tcx> for RevealAllLayoutCx<'tcx> {
430 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
435 impl<'tcx> rustc_target::abi::HasDataLayout for RevealAllLayoutCx<'tcx> {
436 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
441 impl<'tcx> layout::HasParamEnv<'tcx> for RevealAllLayoutCx<'tcx> {
442 fn param_env(&self) -> ParamEnv<'tcx> {
443 ParamEnv::reveal_all()
447 impl<'tcx> HasTargetSpec for RevealAllLayoutCx<'tcx> {
448 fn target_spec(&self) -> &Target {