1 use rustc_target::abi::{Integer, Primitive};
2 use rustc_target::spec::{HasTargetSpec, Target};
3 use rustc_index::vec::IndexVec;
5 use cranelift_codegen::ir::{InstructionData, Opcode, ValueDef};
9 pub(crate) fn pointer_ty(tcx: TyCtxt<'_>) -> types::Type {
10 match tcx.data_layout.pointer_size.bits() {
14 bits => bug!("ptr_sized_integer: unknown pointer bit size {}", bits),
18 pub(crate) fn scalar_to_clif_type(tcx: TyCtxt<'_>, scalar: Scalar) -> Type {
20 Primitive::Int(int, _sign) => match int {
21 Integer::I8 => types::I8,
22 Integer::I16 => types::I16,
23 Integer::I32 => types::I32,
24 Integer::I64 => types::I64,
25 Integer::I128 => types::I128,
27 Primitive::F32 => types::F32,
28 Primitive::F64 => types::F64,
29 Primitive::Pointer => pointer_ty(tcx),
33 fn clif_type_from_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<types::Type> {
35 ty::Bool => types::I8,
36 ty::Uint(size) => match size {
37 UintTy::U8 => types::I8,
38 UintTy::U16 => types::I16,
39 UintTy::U32 => types::I32,
40 UintTy::U64 => types::I64,
41 UintTy::U128 => types::I128,
42 UintTy::Usize => pointer_ty(tcx),
44 ty::Int(size) => match size {
45 IntTy::I8 => types::I8,
46 IntTy::I16 => types::I16,
47 IntTy::I32 => types::I32,
48 IntTy::I64 => types::I64,
49 IntTy::I128 => types::I128,
50 IntTy::Isize => pointer_ty(tcx),
52 ty::Char => types::I32,
53 ty::Float(size) => match size {
54 FloatTy::F32 => types::F32,
55 FloatTy::F64 => types::F64,
57 ty::FnPtr(_) => pointer_ty(tcx),
58 ty::RawPtr(TypeAndMut { ty: pointee_ty, mutbl: _ }) | ty::Ref(_, pointee_ty, _) => {
59 if has_ptr_meta(tcx, pointee_ty) {
65 ty::Param(_) => bug!("ty param {:?}", ty),
70 fn clif_pair_type_from_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<(types::Type, types::Type)> {
72 ty::Tuple(substs) if substs.len() == 2 => {
73 let mut types = substs.types();
75 clif_type_from_ty(tcx, types.next().unwrap())?,
76 clif_type_from_ty(tcx, types.next().unwrap())?,
83 /// Is a pointer to this type a fat ptr?
84 pub(crate) fn has_ptr_meta<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> bool {
85 let ptr_ty = tcx.mk_ptr(TypeAndMut { ty, mutbl: rustc_hir::Mutability::Not });
86 match &tcx.layout_of(ParamEnv::reveal_all().and(ptr_ty)).unwrap().abi {
87 Abi::Scalar(_) => false,
88 Abi::ScalarPair(_, _) => true,
89 abi => unreachable!("Abi of ptr to {:?} is {:?}???", ty, abi),
93 pub(crate) fn codegen_icmp_imm(
94 fx: &mut FunctionCx<'_, '_, impl Backend>,
99 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
100 if lhs_ty == types::I128 {
101 // FIXME legalize `icmp_imm.i128` in Cranelift
103 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
104 let (rhs_lsb, rhs_msb) = (rhs as u128 as u64 as i64, (rhs as u128 >> 64) as u64 as i64);
108 let lsb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_lsb, rhs_lsb);
109 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
110 fx.bcx.ins().band(lsb_eq, msb_eq)
113 let lsb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_lsb, rhs_lsb);
114 let msb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_msb, rhs_msb);
115 fx.bcx.ins().bor(lsb_ne, msb_ne)
124 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
125 let lsb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_lsb, rhs_lsb);
126 let msb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_msb, rhs_msb);
128 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
132 let rhs = i64::try_from(rhs).expect("codegen_icmp_imm rhs out of range for <128bit int");
133 fx.bcx.ins().icmp_imm(intcc, lhs, rhs)
137 fn resolve_normal_value_imm(func: &Function, val: Value) -> Option<i64> {
138 if let ValueDef::Result(inst, 0 /*param*/) = func.dfg.value_def(val) {
139 if let InstructionData::UnaryImm {
140 opcode: Opcode::Iconst,
153 fn resolve_128bit_value_imm(func: &Function, val: Value) -> Option<u128> {
154 let (lsb, msb) = if let ValueDef::Result(inst, 0 /*param*/) = func.dfg.value_def(val) {
155 if let InstructionData::Binary {
156 opcode: Opcode::Iconcat,
168 let lsb = resolve_normal_value_imm(func, lsb)? as u64 as u128;
169 let msb = resolve_normal_value_imm(func, msb)? as u64 as u128;
171 Some(msb << 64 | lsb)
174 pub(crate) fn resolve_value_imm(func: &Function, val: Value) -> Option<u128> {
175 if func.dfg.value_type(val) == types::I128 {
176 resolve_128bit_value_imm(func, val)
178 resolve_normal_value_imm(func, val).map(|imm| imm as u64 as u128)
182 pub(crate) fn type_min_max_value(bcx: &mut FunctionBuilder<'_>, ty: Type, signed: bool) -> (Value, Value) {
183 assert!(ty.is_int());
185 if ty == types::I128 {
187 let min = i128::MIN as u128;
188 let min_lsb = bcx.ins().iconst(types::I64, min as u64 as i64);
189 let min_msb = bcx.ins().iconst(types::I64, (min >> 64) as u64 as i64);
190 let min = bcx.ins().iconcat(min_lsb, min_msb);
192 let max = i128::MIN as u128;
193 let max_lsb = bcx.ins().iconst(types::I64, max as u64 as i64);
194 let max_msb = bcx.ins().iconst(types::I64, (max >> 64) as u64 as i64);
195 let max = bcx.ins().iconcat(max_lsb, max_msb);
199 let min_half = bcx.ins().iconst(types::I64, 0);
200 let min = bcx.ins().iconcat(min_half, min_half);
202 let max_half = bcx.ins().iconst(types::I64, u64::MAX as i64);
203 let max = bcx.ins().iconcat(max_half, max_half);
209 let min = match (ty, signed) {
210 (types::I8, false) | (types::I16, false) | (types::I32, false) | (types::I64, false) => {
213 (types::I8, true) => i8::MIN as i64,
214 (types::I16, true) => i16::MIN as i64,
215 (types::I32, true) => i32::MIN as i64,
216 (types::I64, true) => i64::MIN,
220 let max = match (ty, signed) {
221 (types::I8, false) => u8::MAX as i64,
222 (types::I16, false) => u16::MAX as i64,
223 (types::I32, false) => u32::MAX as i64,
224 (types::I64, false) => u64::MAX as i64,
225 (types::I8, true) => i8::MAX as i64,
226 (types::I16, true) => i16::MAX as i64,
227 (types::I32, true) => i32::MAX as i64,
228 (types::I64, true) => i64::MAX,
232 let (min, max) = (bcx.ins().iconst(ty, min), bcx.ins().iconst(ty, max));
237 pub(crate) fn type_sign(ty: Ty<'_>) -> bool {
239 ty::Ref(..) | ty::RawPtr(..) | ty::FnPtr(..) | ty::Char | ty::Uint(..) | ty::Bool => false,
241 ty::Float(..) => false, // `signed` is unused for floats
242 _ => panic!("{}", ty),
246 pub(crate) struct FunctionCx<'clif, 'tcx, B: Backend + 'static> {
247 // FIXME use a reference to `CodegenCx` instead of `tcx`, `module` and `constants` and `caches`
248 pub(crate) tcx: TyCtxt<'tcx>,
249 pub(crate) module: &'clif mut Module<B>,
250 pub(crate) pointer_type: Type, // Cached from module
252 pub(crate) instance: Instance<'tcx>,
253 pub(crate) mir: &'tcx Body<'tcx>,
255 pub(crate) bcx: FunctionBuilder<'clif>,
256 pub(crate) block_map: IndexVec<BasicBlock, Block>,
257 pub(crate) local_map: FxHashMap<Local, CPlace<'tcx>>,
259 /// When `#[track_caller]` is used, the implicit caller location is stored in this variable.
260 pub(crate) caller_location: Option<CValue<'tcx>>,
262 /// See [crate::optimize::code_layout] for more information.
263 pub(crate) cold_blocks: EntitySet<Block>,
265 pub(crate) clif_comments: crate::pretty_clif::CommentWriter,
266 pub(crate) constants_cx: &'clif mut crate::constant::ConstantCx,
267 pub(crate) vtables: &'clif mut FxHashMap<(Ty<'tcx>, Option<ty::PolyExistentialTraitRef<'tcx>>), DataId>,
269 pub(crate) source_info_set: indexmap::IndexSet<SourceInfo>,
271 /// This should only be accessed by `CPlace::new_var`.
272 pub(crate) next_ssa_var: u32,
275 impl<'tcx, B: Backend> LayoutOf for FunctionCx<'_, 'tcx, B> {
277 type TyAndLayout = TyAndLayout<'tcx>;
279 fn layout_of(&self, ty: Ty<'tcx>) -> TyAndLayout<'tcx> {
280 assert!(!ty.needs_subst());
282 .layout_of(ParamEnv::reveal_all().and(&ty))
283 .unwrap_or_else(|e| {
284 if let layout::LayoutError::SizeOverflow(_) = e {
285 self.tcx.sess.fatal(&e.to_string())
287 bug!("failed to get layout for `{}`: {}", ty, e)
293 impl<'tcx, B: Backend + 'static> layout::HasTyCtxt<'tcx> for FunctionCx<'_, 'tcx, B> {
294 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
299 impl<'tcx, B: Backend + 'static> rustc_target::abi::HasDataLayout for FunctionCx<'_, 'tcx, B> {
300 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
301 &self.tcx.data_layout
305 impl<'tcx, B: Backend + 'static> layout::HasParamEnv<'tcx> for FunctionCx<'_, 'tcx, B> {
306 fn param_env(&self) -> ParamEnv<'tcx> {
307 ParamEnv::reveal_all()
311 impl<'tcx, B: Backend + 'static> HasTargetSpec for FunctionCx<'_, 'tcx, B> {
312 fn target_spec(&self) -> &Target {
313 &self.tcx.sess.target.target
317 impl<'tcx, B: Backend + 'static> FunctionCx<'_, 'tcx, B> {
318 pub(crate) fn monomorphize<T>(&self, value: &T) -> T
320 T: TypeFoldable<'tcx> + Copy,
322 if let Some(substs) = self.instance.substs_for_mir_body() {
323 self.tcx.subst_and_normalize_erasing_regions(
325 ty::ParamEnv::reveal_all(),
329 self.tcx.normalize_erasing_regions(ty::ParamEnv::reveal_all(), *value)
333 pub(crate) fn clif_type(&self, ty: Ty<'tcx>) -> Option<Type> {
334 clif_type_from_ty(self.tcx, ty)
337 pub(crate) fn clif_pair_type(&self, ty: Ty<'tcx>) -> Option<(Type, Type)> {
338 clif_pair_type_from_ty(self.tcx, ty)
341 pub(crate) fn get_block(&self, bb: BasicBlock) -> Block {
342 *self.block_map.get(bb).unwrap()
345 pub(crate) fn get_local_place(&mut self, local: Local) -> CPlace<'tcx> {
346 *self.local_map.get(&local).unwrap_or_else(|| {
347 panic!("Local {:?} doesn't exist", local);
351 pub(crate) fn set_debug_loc(&mut self, source_info: mir::SourceInfo) {
352 let (index, _) = self.source_info_set.insert_full(source_info);
353 self.bcx.set_srcloc(SourceLoc::new(index as u32));
356 pub(crate) fn get_caller_location(&mut self, span: Span) -> CValue<'tcx> {
357 if let Some(loc) = self.caller_location {
358 // `#[track_caller]` is used; return caller location instead of current location.
362 let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
363 let caller = self.tcx.sess.source_map().lookup_char_pos(topmost.lo());
364 let const_loc = self.tcx.const_caller_location((
365 rustc_span::symbol::Symbol::intern(&caller.file.name.to_string()),
367 caller.col_display as u32 + 1,
369 crate::constant::trans_const_value(
371 ty::Const::from_value(self.tcx, const_loc, self.tcx.caller_location_ty()),
375 pub(crate) fn triple(&self) -> &target_lexicon::Triple {
376 self.module.isa().triple()
379 pub(crate) fn anonymous_str(&mut self, prefix: &str, msg: &str) -> Value {
380 use std::collections::hash_map::DefaultHasher;
381 use std::hash::{Hash, Hasher};
383 let mut hasher = DefaultHasher::new();
384 msg.hash(&mut hasher);
385 let msg_hash = hasher.finish();
386 let mut data_ctx = DataContext::new();
387 data_ctx.define(msg.as_bytes().to_vec().into_boxed_slice());
391 &format!("__{}_{:08x}", prefix, msg_hash),
399 // Ignore DuplicateDefinition error, as the data will be the same
400 let _ = self.module.define_data(msg_id, &data_ctx);
402 let local_msg_id = self.module.declare_data_in_func(msg_id, self.bcx.func);
403 #[cfg(debug_assertions)]
405 self.add_comment(local_msg_id, msg);
407 self.bcx.ins().global_value(self.pointer_type, local_msg_id)