1 use rustc::ty::layout::{Integer, Primitive};
2 use rustc_target::spec::{HasTargetSpec, Target};
4 use cranelift::codegen::ir::{InstructionData, Opcode, ValueDef};
8 pub fn mir_var(loc: Local) -> Variable {
9 Variable::with_u32(loc.index() as u32)
12 pub fn pointer_ty(tcx: TyCtxt) -> types::Type {
13 match tcx.data_layout.pointer_size.bits() {
17 bits => bug!("ptr_sized_integer: unknown pointer bit size {}", bits),
21 pub fn scalar_to_clif_type(tcx: TyCtxt, scalar: Scalar) -> Type {
23 Primitive::Int(int, _sign) => match int {
24 Integer::I8 => types::I8,
25 Integer::I16 => types::I16,
26 Integer::I32 => types::I32,
27 Integer::I64 => types::I64,
28 Integer::I128 => types::I128,
30 Primitive::F32 => types::F32,
31 Primitive::F64 => types::F64,
32 Primitive::Pointer => pointer_ty(tcx),
36 pub fn clif_type_from_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<types::Type> {
38 ty::Bool => types::I8,
39 ty::Uint(size) => match size {
40 UintTy::U8 => types::I8,
41 UintTy::U16 => types::I16,
42 UintTy::U32 => types::I32,
43 UintTy::U64 => types::I64,
44 UintTy::U128 => types::I128,
45 UintTy::Usize => pointer_ty(tcx),
47 ty::Int(size) => match size {
48 IntTy::I8 => types::I8,
49 IntTy::I16 => types::I16,
50 IntTy::I32 => types::I32,
51 IntTy::I64 => types::I64,
52 IntTy::I128 => types::I128,
53 IntTy::Isize => pointer_ty(tcx),
55 ty::Char => types::I32,
56 ty::Float(size) => match size {
57 FloatTy::F32 => types::F32,
58 FloatTy::F64 => types::F64,
60 ty::FnPtr(_) => pointer_ty(tcx),
61 ty::RawPtr(TypeAndMut { ty: pointee_ty, mutbl: _ }) | ty::Ref(_, pointee_ty, _) => {
62 if has_ptr_meta(tcx, pointee_ty) {
68 ty::Param(_) => bug!("ty param {:?}", ty),
73 /// Is a pointer to this type a fat ptr?
74 pub fn has_ptr_meta<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> bool {
75 let ptr_ty = tcx.mk_ptr(TypeAndMut { ty, mutbl: rustc::hir::Mutability::Immutable });
76 match &tcx.layout_of(ParamEnv::reveal_all().and(ptr_ty)).unwrap().abi {
77 Abi::Scalar(_) => false,
78 Abi::ScalarPair(_, _) => true,
79 abi => unreachable!("Abi of ptr to {:?} is {:?}???", ty, abi),
83 pub fn codegen_select(bcx: &mut FunctionBuilder, cond: Value, lhs: Value, rhs: Value) -> Value {
84 let lhs_ty = bcx.func.dfg.value_type(lhs);
85 let rhs_ty = bcx.func.dfg.value_type(rhs);
86 assert_eq!(lhs_ty, rhs_ty);
87 if lhs_ty == types::I8 || lhs_ty == types::I16 {
88 // FIXME workaround for missing encoding for select.i8
89 let lhs = bcx.ins().uextend(types::I32, lhs);
90 let rhs = bcx.ins().uextend(types::I32, rhs);
91 let res = bcx.ins().select(cond, lhs, rhs);
92 bcx.ins().ireduce(lhs_ty, res)
94 bcx.ins().select(cond, lhs, rhs)
99 fx: &mut FunctionCx<'_, '_, impl Backend>,
104 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
105 let rhs_ty = fx.bcx.func.dfg.value_type(rhs);
106 assert_eq!(lhs_ty, rhs_ty);
107 if lhs_ty == types::I128 {
108 // FIXME legalize `icmp.i128` in Cranelift
110 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
111 let (rhs_lsb, rhs_msb) = fx.bcx.ins().isplit(rhs);
115 let lsb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_lsb, rhs_lsb);
116 let msb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_msb, rhs_msb);
117 fx.bcx.ins().band(lsb_eq, msb_eq)
120 let lsb_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_lsb, rhs_lsb);
121 let msb_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_msb, rhs_msb);
122 fx.bcx.ins().bor(lsb_ne, msb_ne)
131 let msb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_msb, rhs_msb);
132 let lsb_cc = fx.bcx.ins().icmp(intcc, lhs_lsb, rhs_lsb);
133 let msb_cc = fx.bcx.ins().icmp(intcc, lhs_msb, rhs_msb);
135 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
139 fx.bcx.ins().icmp(intcc, lhs, rhs)
143 pub fn codegen_icmp_imm(
144 fx: &mut FunctionCx<'_, '_, impl Backend>,
149 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
150 if lhs_ty == types::I128 {
151 // FIXME legalize `icmp_imm.i128` in Cranelift
153 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
154 let (rhs_lsb, rhs_msb) = (rhs as u128 as u64 as i64, (rhs as u128 >> 64) as u64 as i64);
158 let lsb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_lsb, rhs_lsb);
159 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
160 fx.bcx.ins().band(lsb_eq, msb_eq)
163 let lsb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_lsb, rhs_lsb);
164 let msb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_msb, rhs_msb);
165 fx.bcx.ins().bor(lsb_ne, msb_ne)
174 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
175 let lsb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_lsb, rhs_lsb);
176 let msb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_msb, rhs_msb);
178 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
182 let rhs = i64::try_from(rhs).expect("codegen_icmp_imm rhs out of range for <128bit int");
183 fx.bcx.ins().icmp_imm(intcc, lhs, rhs)
187 fn resolve_normal_value_imm(func: &Function, val: Value) -> Option<i64> {
188 if let ValueDef::Result(inst, 0 /*param*/) = func.dfg.value_def(val) {
189 if let InstructionData::UnaryImm {
190 opcode: Opcode::Iconst,
203 fn resolve_128bit_value_imm(func: &Function, val: Value) -> Option<u128> {
204 let (lsb, msb) = if let ValueDef::Result(inst, 0 /*param*/) = func.dfg.value_def(val) {
205 if let InstructionData::Binary {
206 opcode: Opcode::Iconcat,
218 let lsb = resolve_normal_value_imm(func, lsb)? as u64 as u128;
219 let msb = resolve_normal_value_imm(func, msb)? as u64 as u128;
221 Some(msb << 64 | lsb)
224 pub fn resolve_value_imm(func: &Function, val: Value) -> Option<u128> {
225 if func.dfg.value_type(val) == types::I128 {
226 resolve_128bit_value_imm(func, val)
228 resolve_normal_value_imm(func, val).map(|imm| imm as u64 as u128)
232 pub fn type_min_max_value(ty: Type, signed: bool) -> (i64, i64) {
233 assert!(ty.is_int());
234 let min = match (ty, signed) {
235 (types::I8, false) | (types::I16, false) | (types::I32, false) | (types::I64, false) => {
238 (types::I8, true) => i8::min_value() as i64,
239 (types::I16, true) => i16::min_value() as i64,
240 (types::I32, true) => i32::min_value() as i64,
241 (types::I64, true) => i64::min_value(),
242 (types::I128, _) => unimplemented!(),
246 let max = match (ty, signed) {
247 (types::I8, false) => u8::max_value() as i64,
248 (types::I16, false) => u16::max_value() as i64,
249 (types::I32, false) => u32::max_value() as i64,
250 (types::I64, false) => u64::max_value() as i64,
251 (types::I8, true) => i8::max_value() as i64,
252 (types::I16, true) => i16::max_value() as i64,
253 (types::I32, true) => i32::max_value() as i64,
254 (types::I64, true) => i64::max_value(),
255 (types::I128, _) => unimplemented!(),
262 pub fn type_sign(ty: Ty<'_>) -> bool {
264 ty::Ref(..) | ty::RawPtr(..) | ty::FnPtr(..) | ty::Char | ty::Uint(..) | ty::Bool => false,
266 ty::Float(..) => false, // `signed` is unused for floats
267 _ => panic!("{}", ty),
271 pub struct FunctionCx<'clif, 'tcx, B: Backend + 'static> {
272 // FIXME use a reference to `CodegenCx` instead of `tcx`, `module` and `constants` and `caches`
273 pub tcx: TyCtxt<'tcx>,
274 pub module: &'clif mut Module<B>,
275 pub pointer_type: Type, // Cached from module
277 pub instance: Instance<'tcx>,
278 pub mir: &'tcx Body<'tcx>,
280 pub bcx: FunctionBuilder<'clif>,
281 pub ebb_map: HashMap<BasicBlock, Ebb>,
282 pub local_map: HashMap<Local, CPlace<'tcx>>,
284 pub clif_comments: crate::pretty_clif::CommentWriter,
285 pub constants_cx: &'clif mut crate::constant::ConstantCx,
286 pub caches: &'clif mut Caches<'tcx>,
288 // FIXME switch back to `SourceInfo`, once it derives `Eq` and `Hash` again.
289 pub source_info_set: indexmap::IndexSet<(Span, mir::SourceScope)>,
292 impl<'tcx, B: Backend> LayoutOf for FunctionCx<'_, 'tcx, B> {
294 type TyLayout = TyLayout<'tcx>;
296 fn layout_of(&self, ty: Ty<'tcx>) -> TyLayout<'tcx> {
297 let ty = self.monomorphize(&ty);
299 .layout_of(ParamEnv::reveal_all().and(&ty))
300 .unwrap_or_else(|e| {
301 if let layout::LayoutError::SizeOverflow(_) = e {
302 self.tcx.sess.fatal(&e.to_string())
304 bug!("failed to get layout for `{}`: {}", ty, e)
310 impl<'tcx, B: Backend + 'static> layout::HasTyCtxt<'tcx> for FunctionCx<'_, 'tcx, B> {
311 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
316 impl<'tcx, B: Backend + 'static> layout::HasDataLayout for FunctionCx<'_, 'tcx, B> {
317 fn data_layout(&self) -> &layout::TargetDataLayout {
318 &self.tcx.data_layout
322 impl<'tcx, B: Backend + 'static> layout::HasParamEnv<'tcx> for FunctionCx<'_, 'tcx, B> {
323 fn param_env(&self) -> ParamEnv<'tcx> {
324 ParamEnv::reveal_all()
328 impl<'tcx, B: Backend + 'static> HasTargetSpec for FunctionCx<'_, 'tcx, B> {
329 fn target_spec(&self) -> &Target {
330 &self.tcx.sess.target.target
334 impl<'tcx, B: Backend> BackendTypes for FunctionCx<'_, 'tcx, B> {
336 type Function = Value;
337 type BasicBlock = Ebb;
343 impl<'tcx, B: Backend + 'static> FunctionCx<'_, 'tcx, B> {
344 pub fn monomorphize<T>(&self, value: &T) -> T
346 T: TypeFoldable<'tcx>,
348 self.tcx.subst_and_normalize_erasing_regions(
349 self.instance.substs,
350 ty::ParamEnv::reveal_all(),
355 pub fn clif_type(&self, ty: Ty<'tcx>) -> Option<Type> {
356 clif_type_from_ty(self.tcx, self.monomorphize(&ty))
359 pub fn get_ebb(&self, bb: BasicBlock) -> Ebb {
360 *self.ebb_map.get(&bb).unwrap()
363 pub fn get_local_place(&mut self, local: Local) -> CPlace<'tcx> {
364 *self.local_map.get(&local).unwrap()
367 pub fn set_debug_loc(&mut self, source_info: mir::SourceInfo) {
368 let (index, _) = self.source_info_set.insert_full((source_info.span, source_info.scope));
369 self.bcx.set_srcloc(SourceLoc::new(index as u32));
372 pub fn get_caller_location(&mut self, span: Span) -> CValue<'tcx> {
373 let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
374 let caller = self.tcx.sess.source_map().lookup_char_pos(topmost.lo());
375 let const_loc = self.tcx.const_caller_location((
376 syntax::symbol::Symbol::intern(&caller.file.name.to_string()),
378 caller.col_display as u32 + 1,
380 crate::constant::trans_const_value(self, const_loc)