1 use rustc_index::vec::IndexVec;
2 use rustc_target::abi::{Integer, Primitive};
3 use rustc_target::spec::{HasTargetSpec, Target};
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> {
34 Some(match ty.kind() {
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 {
62 | ty::Ref(_, pointee_ty, _) => {
63 if has_ptr_meta(tcx, pointee_ty) {
69 ty::Adt(adt_def, _) if adt_def.repr.simd() => {
70 let (element, count) = match &tcx.layout_of(ParamEnv::reveal_all().and(ty)).unwrap().abi
72 Abi::Vector { element, count } => (element.clone(), *count),
76 match scalar_to_clif_type(tcx, element).by(u16::try_from(count).unwrap()) {
77 // Cranelift currently only implements icmp for 128bit vectors.
78 Some(vector_ty) if vector_ty.bits() == 128 => vector_ty,
82 ty::Param(_) => bug!("ty param {:?}", ty),
87 fn clif_pair_type_from_ty<'tcx>(
90 ) -> Option<(types::Type, types::Type)> {
91 Some(match ty.kind() {
92 ty::Tuple(substs) if substs.len() == 2 => {
93 let mut types = substs.types();
94 let a = clif_type_from_ty(tcx, types.next().unwrap())?;
95 let b = clif_type_from_ty(tcx, types.next().unwrap())?;
96 if a.is_vector() || b.is_vector() {
101 ty::RawPtr(TypeAndMut {
105 | ty::Ref(_, pointee_ty, _) => {
106 if has_ptr_meta(tcx, pointee_ty) {
107 (pointer_ty(tcx), pointer_ty(tcx))
116 /// Is a pointer to this type a fat ptr?
117 pub(crate) fn has_ptr_meta<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> bool {
118 let ptr_ty = tcx.mk_ptr(TypeAndMut {
120 mutbl: rustc_hir::Mutability::Not,
123 .layout_of(ParamEnv::reveal_all().and(ptr_ty))
127 Abi::Scalar(_) => false,
128 Abi::ScalarPair(_, _) => true,
129 abi => unreachable!("Abi of ptr to {:?} is {:?}???", ty, abi),
133 pub(crate) fn codegen_icmp_imm(
134 fx: &mut FunctionCx<'_, '_, impl Module>,
139 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
140 if lhs_ty == types::I128 {
141 // FIXME legalize `icmp_imm.i128` in Cranelift
143 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
144 let (rhs_lsb, rhs_msb) = (rhs as u128 as u64 as i64, (rhs as u128 >> 64) as u64 as i64);
148 let lsb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_lsb, rhs_lsb);
149 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
150 fx.bcx.ins().band(lsb_eq, msb_eq)
153 let lsb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_lsb, rhs_lsb);
154 let msb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_msb, rhs_msb);
155 fx.bcx.ins().bor(lsb_ne, msb_ne)
164 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
165 let lsb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_lsb, rhs_lsb);
166 let msb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_msb, rhs_msb);
168 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
172 let rhs = i64::try_from(rhs).expect("codegen_icmp_imm rhs out of range for <128bit int");
173 fx.bcx.ins().icmp_imm(intcc, lhs, rhs)
177 fn resolve_normal_value_imm(func: &Function, val: Value) -> Option<i64> {
178 if let ValueDef::Result(inst, 0 /*param*/) = func.dfg.value_def(val) {
179 if let InstructionData::UnaryImm {
180 opcode: Opcode::Iconst,
193 fn resolve_128bit_value_imm(func: &Function, val: Value) -> Option<u128> {
194 let (lsb, msb) = if let ValueDef::Result(inst, 0 /*param*/) = func.dfg.value_def(val) {
195 if let InstructionData::Binary {
196 opcode: Opcode::Iconcat,
208 let lsb = u128::from(resolve_normal_value_imm(func, lsb)? as u64);
209 let msb = u128::from(resolve_normal_value_imm(func, msb)? as u64);
211 Some(msb << 64 | lsb)
214 pub(crate) fn resolve_value_imm(func: &Function, val: Value) -> Option<u128> {
215 if func.dfg.value_type(val) == types::I128 {
216 resolve_128bit_value_imm(func, val)
218 resolve_normal_value_imm(func, val).map(|imm| u128::from(imm as u64))
222 pub(crate) fn type_min_max_value(
223 bcx: &mut FunctionBuilder<'_>,
226 ) -> (Value, Value) {
227 assert!(ty.is_int());
229 if ty == types::I128 {
231 let min = i128::MIN as u128;
232 let min_lsb = bcx.ins().iconst(types::I64, min as u64 as i64);
233 let min_msb = bcx.ins().iconst(types::I64, (min >> 64) as u64 as i64);
234 let min = bcx.ins().iconcat(min_lsb, min_msb);
236 let max = i128::MIN as u128;
237 let max_lsb = bcx.ins().iconst(types::I64, max as u64 as i64);
238 let max_msb = bcx.ins().iconst(types::I64, (max >> 64) as u64 as i64);
239 let max = bcx.ins().iconcat(max_lsb, max_msb);
243 let min_half = bcx.ins().iconst(types::I64, 0);
244 let min = bcx.ins().iconcat(min_half, min_half);
246 let max_half = bcx.ins().iconst(types::I64, u64::MAX as i64);
247 let max = bcx.ins().iconcat(max_half, max_half);
253 let min = match (ty, signed) {
254 (types::I8, false) | (types::I16, false) | (types::I32, false) | (types::I64, false) => {
257 (types::I8, true) => i64::from(i8::MIN),
258 (types::I16, true) => i64::from(i16::MIN),
259 (types::I32, true) => i64::from(i32::MIN),
260 (types::I64, true) => i64::MIN,
264 let max = match (ty, signed) {
265 (types::I8, false) => i64::from(u8::MAX),
266 (types::I16, false) => i64::from(u16::MAX),
267 (types::I32, false) => i64::from(u32::MAX),
268 (types::I64, false) => u64::MAX as i64,
269 (types::I8, true) => i64::from(i8::MAX),
270 (types::I16, true) => i64::from(i16::MAX),
271 (types::I32, true) => i64::from(i32::MAX),
272 (types::I64, true) => i64::MAX,
276 let (min, max) = (bcx.ins().iconst(ty, min), bcx.ins().iconst(ty, max));
281 pub(crate) fn type_sign(ty: Ty<'_>) -> bool {
283 ty::Ref(..) | ty::RawPtr(..) | ty::FnPtr(..) | ty::Char | ty::Uint(..) | ty::Bool => false,
285 ty::Float(..) => false, // `signed` is unused for floats
286 _ => panic!("{}", ty),
290 pub(crate) struct FunctionCx<'clif, 'tcx, M: Module> {
291 pub(crate) cx: &'clif mut crate::CodegenCx<'tcx, M>,
292 pub(crate) tcx: TyCtxt<'tcx>,
293 pub(crate) pointer_type: Type, // Cached from module
295 pub(crate) instance: Instance<'tcx>,
296 pub(crate) mir: &'tcx Body<'tcx>,
298 pub(crate) bcx: FunctionBuilder<'clif>,
299 pub(crate) block_map: IndexVec<BasicBlock, Block>,
300 pub(crate) local_map: IndexVec<Local, CPlace<'tcx>>,
302 /// When `#[track_caller]` is used, the implicit caller location is stored in this variable.
303 pub(crate) caller_location: Option<CValue<'tcx>>,
305 /// See [`crate::optimize::code_layout`] for more information.
306 pub(crate) cold_blocks: EntitySet<Block>,
308 pub(crate) clif_comments: crate::pretty_clif::CommentWriter,
309 pub(crate) source_info_set: indexmap::IndexSet<SourceInfo>,
311 /// This should only be accessed by `CPlace::new_var`.
312 pub(crate) next_ssa_var: u32,
314 pub(crate) inline_asm_index: u32,
317 impl<'tcx, M: Module> LayoutOf for FunctionCx<'_, 'tcx, M> {
319 type TyAndLayout = TyAndLayout<'tcx>;
321 fn layout_of(&self, ty: Ty<'tcx>) -> TyAndLayout<'tcx> {
322 assert!(!ty.still_further_specializable());
324 .layout_of(ParamEnv::reveal_all().and(&ty))
325 .unwrap_or_else(|e| {
326 if let layout::LayoutError::SizeOverflow(_) = e {
327 self.tcx.sess.fatal(&e.to_string())
329 bug!("failed to get layout for `{}`: {}", ty, e)
335 impl<'tcx, M: Module> layout::HasTyCtxt<'tcx> for FunctionCx<'_, 'tcx, M> {
336 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
341 impl<'tcx, M: Module> rustc_target::abi::HasDataLayout for FunctionCx<'_, 'tcx, M> {
342 fn data_layout(&self) -> &rustc_target::abi::TargetDataLayout {
343 &self.tcx.data_layout
347 impl<'tcx, M: Module> layout::HasParamEnv<'tcx> for FunctionCx<'_, 'tcx, M> {
348 fn param_env(&self) -> ParamEnv<'tcx> {
349 ParamEnv::reveal_all()
353 impl<'tcx, M: Module> HasTargetSpec for FunctionCx<'_, 'tcx, M> {
354 fn target_spec(&self) -> &Target {
355 &self.tcx.sess.target
359 impl<'tcx, M: Module> FunctionCx<'_, 'tcx, M> {
360 pub(crate) fn monomorphize<T>(&self, value: &T) -> T
362 T: TypeFoldable<'tcx> + Copy,
364 if let Some(substs) = self.instance.substs_for_mir_body() {
366 .subst_and_normalize_erasing_regions(substs, ty::ParamEnv::reveal_all(), value)
369 .normalize_erasing_regions(ty::ParamEnv::reveal_all(), *value)
373 pub(crate) fn clif_type(&self, ty: Ty<'tcx>) -> Option<Type> {
374 clif_type_from_ty(self.tcx, ty)
377 pub(crate) fn clif_pair_type(&self, ty: Ty<'tcx>) -> Option<(Type, Type)> {
378 clif_pair_type_from_ty(self.tcx, ty)
381 pub(crate) fn get_block(&self, bb: BasicBlock) -> Block {
382 *self.block_map.get(bb).unwrap()
385 pub(crate) fn get_local_place(&mut self, local: Local) -> CPlace<'tcx> {
386 *self.local_map.get(local).unwrap_or_else(|| {
387 panic!("Local {:?} doesn't exist", local);
391 pub(crate) fn set_debug_loc(&mut self, source_info: mir::SourceInfo) {
392 let (index, _) = self.source_info_set.insert_full(source_info);
393 self.bcx.set_srcloc(SourceLoc::new(index as u32));
396 pub(crate) fn get_caller_location(&mut self, span: Span) -> CValue<'tcx> {
397 if let Some(loc) = self.caller_location {
398 // `#[track_caller]` is used; return caller location instead of current location.
402 let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
403 let caller = self.tcx.sess.source_map().lookup_char_pos(topmost.lo());
404 let const_loc = self.tcx.const_caller_location((
405 rustc_span::symbol::Symbol::intern(&caller.file.name.to_string()),
407 caller.col_display as u32 + 1,
409 crate::constant::codegen_const_value(self, const_loc, self.tcx.caller_location_ty())
412 pub(crate) fn triple(&self) -> &target_lexicon::Triple {
413 self.cx.module.isa().triple()
416 pub(crate) fn anonymous_str(&mut self, prefix: &str, msg: &str) -> Value {
417 use std::collections::hash_map::DefaultHasher;
418 use std::hash::{Hash, Hasher};
420 let mut hasher = DefaultHasher::new();
421 msg.hash(&mut hasher);
422 let msg_hash = hasher.finish();
423 let mut data_ctx = DataContext::new();
424 data_ctx.define(msg.as_bytes().to_vec().into_boxed_slice());
429 &format!("__{}_{:08x}", prefix, msg_hash),
436 // Ignore DuplicateDefinition error, as the data will be the same
437 let _ = self.cx.module.define_data(msg_id, &data_ctx);
439 let local_msg_id = self.cx.module.declare_data_in_func(msg_id, self.bcx.func);
440 #[cfg(debug_assertions)]
442 self.add_comment(local_msg_id, msg);
444 self.bcx.ins().global_value(self.pointer_type, local_msg_id)