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::Not });
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),
84 fx: &mut FunctionCx<'_, '_, impl Backend>,
89 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
90 let rhs_ty = fx.bcx.func.dfg.value_type(rhs);
91 assert_eq!(lhs_ty, rhs_ty);
92 if lhs_ty == types::I128 {
93 // FIXME legalize `icmp.i128` in Cranelift
95 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
96 let (rhs_lsb, rhs_msb) = fx.bcx.ins().isplit(rhs);
100 let lsb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_lsb, rhs_lsb);
101 let msb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_msb, rhs_msb);
102 fx.bcx.ins().band(lsb_eq, msb_eq)
105 let lsb_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_lsb, rhs_lsb);
106 let msb_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_msb, rhs_msb);
107 fx.bcx.ins().bor(lsb_ne, msb_ne)
116 let msb_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_msb, rhs_msb);
117 let lsb_cc = fx.bcx.ins().icmp(intcc, lhs_lsb, rhs_lsb);
118 let msb_cc = fx.bcx.ins().icmp(intcc, lhs_msb, rhs_msb);
120 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
124 fx.bcx.ins().icmp(intcc, lhs, rhs)
128 pub fn codegen_icmp_imm(
129 fx: &mut FunctionCx<'_, '_, impl Backend>,
134 let lhs_ty = fx.bcx.func.dfg.value_type(lhs);
135 if lhs_ty == types::I128 {
136 // FIXME legalize `icmp_imm.i128` in Cranelift
138 let (lhs_lsb, lhs_msb) = fx.bcx.ins().isplit(lhs);
139 let (rhs_lsb, rhs_msb) = (rhs as u128 as u64 as i64, (rhs as u128 >> 64) as u64 as i64);
143 let lsb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_lsb, rhs_lsb);
144 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
145 fx.bcx.ins().band(lsb_eq, msb_eq)
148 let lsb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_lsb, rhs_lsb);
149 let msb_ne = fx.bcx.ins().icmp_imm(IntCC::NotEqual, lhs_msb, rhs_msb);
150 fx.bcx.ins().bor(lsb_ne, msb_ne)
159 let msb_eq = fx.bcx.ins().icmp_imm(IntCC::Equal, lhs_msb, rhs_msb);
160 let lsb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_lsb, rhs_lsb);
161 let msb_cc = fx.bcx.ins().icmp_imm(intcc, lhs_msb, rhs_msb);
163 fx.bcx.ins().select(msb_eq, lsb_cc, msb_cc)
167 let rhs = i64::try_from(rhs).expect("codegen_icmp_imm rhs out of range for <128bit int");
168 fx.bcx.ins().icmp_imm(intcc, lhs, rhs)
172 fn resolve_normal_value_imm(func: &Function, val: Value) -> Option<i64> {
173 if let ValueDef::Result(inst, 0 /*param*/) = func.dfg.value_def(val) {
174 if let InstructionData::UnaryImm {
175 opcode: Opcode::Iconst,
188 fn resolve_128bit_value_imm(func: &Function, val: Value) -> Option<u128> {
189 let (lsb, msb) = if let ValueDef::Result(inst, 0 /*param*/) = func.dfg.value_def(val) {
190 if let InstructionData::Binary {
191 opcode: Opcode::Iconcat,
203 let lsb = resolve_normal_value_imm(func, lsb)? as u64 as u128;
204 let msb = resolve_normal_value_imm(func, msb)? as u64 as u128;
206 Some(msb << 64 | lsb)
209 pub fn resolve_value_imm(func: &Function, val: Value) -> Option<u128> {
210 if func.dfg.value_type(val) == types::I128 {
211 resolve_128bit_value_imm(func, val)
213 resolve_normal_value_imm(func, val).map(|imm| imm as u64 as u128)
217 pub fn type_min_max_value(ty: Type, signed: bool) -> (i64, i64) {
218 assert!(ty.is_int());
219 let min = match (ty, signed) {
220 (types::I8, false) | (types::I16, false) | (types::I32, false) | (types::I64, false) => {
223 (types::I8, true) => i8::min_value() as i64,
224 (types::I16, true) => i16::min_value() as i64,
225 (types::I32, true) => i32::min_value() as i64,
226 (types::I64, true) => i64::min_value(),
227 (types::I128, _) => unimplemented!(),
231 let max = match (ty, signed) {
232 (types::I8, false) => u8::max_value() as i64,
233 (types::I16, false) => u16::max_value() as i64,
234 (types::I32, false) => u32::max_value() as i64,
235 (types::I64, false) => u64::max_value() as i64,
236 (types::I8, true) => i8::max_value() as i64,
237 (types::I16, true) => i16::max_value() as i64,
238 (types::I32, true) => i32::max_value() as i64,
239 (types::I64, true) => i64::max_value(),
240 (types::I128, _) => unimplemented!(),
247 pub fn type_sign(ty: Ty<'_>) -> bool {
249 ty::Ref(..) | ty::RawPtr(..) | ty::FnPtr(..) | ty::Char | ty::Uint(..) | ty::Bool => false,
251 ty::Float(..) => false, // `signed` is unused for floats
252 _ => panic!("{}", ty),
256 pub struct FunctionCx<'clif, 'tcx, B: Backend + 'static> {
257 // FIXME use a reference to `CodegenCx` instead of `tcx`, `module` and `constants` and `caches`
258 pub tcx: TyCtxt<'tcx>,
259 pub module: &'clif mut Module<B>,
260 pub pointer_type: Type, // Cached from module
262 pub instance: Instance<'tcx>,
263 pub mir: &'tcx Body<'tcx>,
265 pub bcx: FunctionBuilder<'clif>,
266 pub ebb_map: HashMap<BasicBlock, Ebb>,
267 pub local_map: HashMap<Local, CPlace<'tcx>>,
269 pub clif_comments: crate::pretty_clif::CommentWriter,
270 pub constants_cx: &'clif mut crate::constant::ConstantCx,
271 pub caches: &'clif mut Caches<'tcx>,
273 pub source_info_set: indexmap::IndexSet<SourceInfo>,
276 impl<'tcx, B: Backend> LayoutOf for FunctionCx<'_, 'tcx, B> {
278 type TyLayout = TyLayout<'tcx>;
280 fn layout_of(&self, ty: Ty<'tcx>) -> TyLayout<'tcx> {
281 assert!(!ty.needs_subst());
283 .layout_of(ParamEnv::reveal_all().and(&ty))
284 .unwrap_or_else(|e| {
285 if let layout::LayoutError::SizeOverflow(_) = e {
286 self.tcx.sess.fatal(&e.to_string())
288 bug!("failed to get layout for `{}`: {}", ty, e)
294 impl<'tcx, B: Backend + 'static> layout::HasTyCtxt<'tcx> for FunctionCx<'_, 'tcx, B> {
295 fn tcx<'b>(&'b self) -> TyCtxt<'tcx> {
300 impl<'tcx, B: Backend + 'static> layout::HasDataLayout for FunctionCx<'_, 'tcx, B> {
301 fn data_layout(&self) -> &layout::TargetDataLayout {
302 &self.tcx.data_layout
306 impl<'tcx, B: Backend + 'static> layout::HasParamEnv<'tcx> for FunctionCx<'_, 'tcx, B> {
307 fn param_env(&self) -> ParamEnv<'tcx> {
308 ParamEnv::reveal_all()
312 impl<'tcx, B: Backend + 'static> HasTargetSpec for FunctionCx<'_, 'tcx, B> {
313 fn target_spec(&self) -> &Target {
314 &self.tcx.sess.target.target
318 impl<'tcx, B: Backend> BackendTypes for FunctionCx<'_, 'tcx, B> {
320 type Function = Value;
321 type BasicBlock = Ebb;
327 impl<'tcx, B: Backend + 'static> FunctionCx<'_, 'tcx, B> {
328 pub fn monomorphize<T>(&self, value: &T) -> T
330 T: TypeFoldable<'tcx>,
332 self.tcx.subst_and_normalize_erasing_regions(
333 self.instance.substs,
334 ty::ParamEnv::reveal_all(),
339 pub fn clif_type(&self, ty: Ty<'tcx>) -> Option<Type> {
340 clif_type_from_ty(self.tcx, self.monomorphize(&ty))
343 pub fn get_ebb(&self, bb: BasicBlock) -> Ebb {
344 *self.ebb_map.get(&bb).unwrap()
347 pub fn get_local_place(&mut self, local: Local) -> CPlace<'tcx> {
348 *self.local_map.get(&local).unwrap()
351 pub 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 fn get_caller_location(&mut self, span: Span) -> CValue<'tcx> {
357 let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
358 let caller = self.tcx.sess.source_map().lookup_char_pos(topmost.lo());
359 let const_loc = self.tcx.const_caller_location((
360 syntax::symbol::Symbol::intern(&caller.file.name.to_string()),
362 caller.col_display as u32 + 1,
364 crate::constant::trans_const_value(self, const_loc)
367 pub fn triple(&self) -> &target_lexicon::Triple {
368 self.module.isa().triple()