1 use rustc::ty::layout::{FloatTy, 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::Float(flt) => match flt {
31 FloatTy::F32 => types::F32,
32 FloatTy::F64 => types::F64,
34 Primitive::Pointer => pointer_ty(tcx),
38 pub fn clif_type_from_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<types::Type> {
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::Param(_) => bug!("ty param {:?}", ty),
75 /// Is a pointer to this type a fat ptr?
76 pub fn has_ptr_meta<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> bool {
77 let ptr_ty = tcx.mk_ptr(TypeAndMut { ty, mutbl: rustc::hir::Mutability::MutImmutable });
78 match &tcx.layout_of(ParamEnv::reveal_all().and(ptr_ty)).unwrap().abi {
79 Abi::Scalar(_) => false,
80 Abi::ScalarPair(_, _) => true,
81 abi => unreachable!("Abi of ptr to {:?} is {:?}???", ty, abi),
85 pub fn codegen_select(bcx: &mut FunctionBuilder, cond: Value, lhs: Value, rhs: Value) -> Value {
86 let lhs_ty = bcx.func.dfg.value_type(lhs);
87 let rhs_ty = bcx.func.dfg.value_type(rhs);
88 assert_eq!(lhs_ty, rhs_ty);
89 if lhs_ty == types::I8 || lhs_ty == types::I16 {
90 // FIXME workaround for missing encoding for select.i8
91 let lhs = bcx.ins().uextend(types::I32, lhs);
92 let rhs = bcx.ins().uextend(types::I32, rhs);
93 let res = bcx.ins().select(cond, lhs, rhs);
94 bcx.ins().ireduce(lhs_ty, res)
96 bcx.ins().select(cond, lhs, rhs)
101 fx: &mut FunctionCx<'_, '_, impl Backend>,
106 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
107 let rhs_ty = fx.bcx.func.dfg.value_type(rhs);
108 assert_eq!(lhs_ty, rhs_ty);
109 if lhs_ty == types::I128 {
110 // FIXME legalize `icmp.i128` in Cranelift
112 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
113 let (rhs_lsb, rhs_msb) = fx.bcx.ins().isplit(rhs);
117 let lsb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_lsb, rhs_lsb);
118 let msb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_msb, rhs_msb);
119 fx.bcx.ins().band(lsb_eq, msb_eq)
122 let lsb_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_lsb, rhs_lsb);
123 let msb_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_msb, rhs_msb);
124 fx.bcx.ins().bor(lsb_ne, msb_ne)
133 let msb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_msb, rhs_msb);
134 let lsb_cc = fx.bcx.ins().icmp(intcc, lhs_lsb, rhs_lsb);
135 let msb_cc = fx.bcx.ins().icmp(intcc, lhs_msb, rhs_msb);
137 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
141 fx.bcx.ins().icmp(intcc, lhs, rhs)
145 pub fn codegen_icmp_imm(
146 fx: &mut FunctionCx<'_, '_, impl Backend>,
151 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
152 if lhs_ty == types::I128 {
153 // FIXME legalize `icmp_imm.i128` in Cranelift
155 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
156 let (rhs_lsb, rhs_msb) = (rhs as u128 as u64 as i64, (rhs as u128 >> 64) as u64 as i64);
160 let lsb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_lsb, rhs_lsb);
161 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
162 fx.bcx.ins().band(lsb_eq, msb_eq)
165 let lsb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_lsb, rhs_lsb);
166 let msb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_msb, rhs_msb);
167 fx.bcx.ins().bor(lsb_ne, msb_ne)
176 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
177 let lsb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_lsb, rhs_lsb);
178 let msb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_msb, rhs_msb);
180 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
184 let rhs = i64::try_from(rhs).expect("codegen_icmp_imm rhs out of range for <128bit int");
185 fx.bcx.ins().icmp_imm(intcc, lhs, rhs)
189 fn resolve_normal_value_imm(func: &Function, val: Value) -> Option<i64> {
190 if let ValueDef::Result(inst, 0 /*param*/) = func.dfg.value_def(val) {
191 if let InstructionData::UnaryImm {
192 opcode: Opcode::Iconst,
205 fn resolve_128bit_value_imm(func: &Function, val: Value) -> Option<u128> {
206 let (lsb, msb) = if let ValueDef::Result(inst, 0 /*param*/) = func.dfg.value_def(val) {
207 if let InstructionData::Binary {
208 opcode: Opcode::Iconcat,
220 let lsb = resolve_normal_value_imm(func, lsb)? as u64 as u128;
221 let msb = resolve_normal_value_imm(func, msb)? as u64 as u128;
223 Some(msb << 64 | lsb)
226 pub fn resolve_value_imm(func: &Function, val: Value) -> Option<u128> {
227 if func.dfg.value_type(val) == types::I128 {
228 resolve_128bit_value_imm(func, val)
230 resolve_normal_value_imm(func, val).map(|imm| imm as u64 as u128)
234 pub fn type_min_max_value(ty: Type, signed: bool) -> (i64, i64) {
235 assert!(ty.is_int());
236 let min = match (ty, signed) {
237 (types::I8, false) | (types::I16, false) | (types::I32, false) | (types::I64, false) => {
240 (types::I8, true) => i8::min_value() as i64,
241 (types::I16, true) => i16::min_value() as i64,
242 (types::I32, true) => i32::min_value() as i64,
243 (types::I64, true) => i64::min_value(),
244 (types::I128, _) => unimplemented!(),
248 let max = match (ty, signed) {
249 (types::I8, false) => u8::max_value() as i64,
250 (types::I16, false) => u16::max_value() as i64,
251 (types::I32, false) => u32::max_value() as i64,
252 (types::I64, false) => u64::max_value() as i64,
253 (types::I8, true) => i8::max_value() as i64,
254 (types::I16, true) => i16::max_value() as i64,
255 (types::I32, true) => i32::max_value() as i64,
256 (types::I64, true) => i64::max_value(),
257 (types::I128, _) => unimplemented!(),
264 pub fn type_sign(ty: Ty<'_>) -> bool {
266 ty::Ref(..) | ty::RawPtr(..) | ty::FnPtr(..) | ty::Char | ty::Uint(..) | ty::Bool => false,
268 ty::Float(..) => false, // `signed` is unused for floats
269 _ => panic!("{}", ty),
273 pub struct FunctionCx<'clif, 'tcx, B: Backend + 'static> {
274 // FIXME use a reference to `CodegenCx` instead of `tcx`, `module` and `constants` and `caches`
275 pub tcx: TyCtxt<'tcx>,
276 pub module: &'clif mut Module<B>,
277 pub pointer_type: Type, // Cached from module
279 pub instance: Instance<'tcx>,
280 pub mir: &'tcx Body<'tcx>,
282 pub bcx: FunctionBuilder,
283 pub ebb_map: HashMap<BasicBlock, Ebb>,
284 pub local_map: HashMap<Local, CPlace<'tcx>>,
286 pub clif_comments: crate::pretty_clif::CommentWriter,
287 pub constants_cx: &'clif mut crate::constant::ConstantCx,
288 pub caches: &'clif mut Caches<'tcx>,
289 pub source_info_set: indexmap::IndexSet<SourceInfo>,
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 BasicBlock = Ebb;
342 impl<'tcx, B: Backend + 'static> FunctionCx<'_, 'tcx, B> {
343 pub fn monomorphize<T>(&self, value: &T) -> T
345 T: TypeFoldable<'tcx>,
347 self.tcx.subst_and_normalize_erasing_regions(
348 self.instance.substs,
349 ty::ParamEnv::reveal_all(),
354 pub fn clif_type(&self, ty: Ty<'tcx>) -> Option<Type> {
355 clif_type_from_ty(self.tcx, self.monomorphize(&ty))
358 pub fn get_ebb(&self, bb: BasicBlock) -> Ebb {
359 *self.ebb_map.get(&bb).unwrap()
362 pub fn get_local_place(&mut self, local: Local) -> CPlace<'tcx> {
363 *self.local_map.get(&local).unwrap()
366 pub fn set_debug_loc(&mut self, source_info: mir::SourceInfo) {
367 let (index, _) = self.source_info_set.insert_full(source_info);
368 self.bcx.set_srcloc(SourceLoc::new(index as u32));