3 struct PrintOnPanic(String);
4 impl Drop for PrintOnPanic {
6 if ::std::thread::panicking() {
7 println!("{}", self.0);
12 pub fn trans_mono_item<'a, 'tcx: 'a>(cx: &mut CodegenCx<'a, 'tcx>, mono_item: MonoItem<'tcx>) {
14 let context = &mut cx.context;
17 MonoItem::Fn(inst) => match inst {
19 def: InstanceDef::Item(def_id),
22 let mut mir = ::std::io::Cursor::new(Vec::new());
23 ::rustc_mir::util::write_mir_pretty(tcx, Some(def_id), &mut mir).unwrap();
24 let mir_file_name = "target/out/mir/".to_string() + &format!("{:?}", def_id).replace('/', "@");
25 ::std::fs::write(mir_file_name, mir.into_inner()).unwrap();
26 let _print_guard = PrintOnPanic(format!("{:?}", inst));
28 let res = each_module!(cx, |(ccx, m)| trans_fn(tcx, *m, ccx, context, inst));
29 if let Some(func_id) = res.jit {
30 cx.defined_functions.push(func_id);
34 def: InstanceDef::DropGlue(_, _),
36 } => unimpl!("Unimplemented drop glue instance"),
37 inst => unimpl!("Unimplemented instance {:?}", inst),
39 MonoItem::Static(def_id) => {
40 each_module!(cx, |(ccx, _m)| {
41 crate::constant::codegen_static(ccx, def_id);
44 MonoItem::GlobalAsm(node_id) => cx
47 .fatal(&format!("Unimplemented global asm mono item {:?}", node_id)),
51 fn trans_fn<'a, 'tcx: 'a>(
52 tcx: TyCtxt<'a, 'tcx, 'tcx>,
53 module: &mut Module<impl Backend>,
54 constants: &mut crate::constant::ConstantCx,
55 context: &mut Context,
56 instance: Instance<'tcx>,
59 let mir = tcx.optimized_mir(instance.def_id());
61 // Step 2. Declare function
62 let (name, sig) = get_function_name_and_sig(tcx, instance);
64 .declare_function(&name, Linkage::Export, &sig)
67 // Step 3. Make FunctionBuilder
68 let mut func = Function::with_name_signature(ExternalName::user(0, 0), sig);
69 let mut func_ctx = FunctionBuilderContext::new();
70 let mut bcx: FunctionBuilder = FunctionBuilder::new(&mut func, &mut func_ctx);
72 // Step 4. Predefine ebb's
73 let start_ebb = bcx.create_ebb();
74 let mut ebb_map: HashMap<BasicBlock, Ebb> = HashMap::new();
75 for (bb, _bb_data) in mir.basic_blocks().iter_enumerated() {
76 ebb_map.insert(bb, bcx.create_ebb());
79 // Step 5. Make FunctionCx
80 let mut fx = FunctionCx {
87 assert!(!instance.substs.needs_infer());
91 local_map: HashMap::new(),
92 comments: HashMap::new(),
98 // Step 6. Codegen function
99 crate::abi::codegen_fn_prelude(&mut fx, start_ebb);
100 codegen_fn_content(&mut fx);
101 fx.bcx.seal_all_blocks();
104 // Step 7. Print function to terminal for debugging
105 let mut writer = crate::pretty_clif::CommentWriter(fx.comments);
106 let mut cton = String::new();
107 ::cranelift::codegen::write::decorate_function(&mut writer, &mut cton, &func, None).unwrap();
108 let clif_file_name = "target/out/clif/".to_string() + &tcx.symbol_name(instance).as_str();
109 ::std::fs::write(clif_file_name, cton.as_bytes()).unwrap();
111 // Step 8. Verify function
112 verify_func(tcx, writer, &func);
114 // Step 9. Define function
115 // TODO: cranelift doesn't yet support some of the things needed
116 if should_codegen(tcx.sess) {
118 module.define_function(func_id, context).unwrap();
125 fn verify_func(tcx: TyCtxt, writer: crate::pretty_clif::CommentWriter, func: &Function) {
126 let flags = settings::Flags::new(settings::builder());
127 match ::cranelift::codegen::verify_function(&func, &flags) {
130 tcx.sess.err(&format!("{:?}", err));
131 let pretty_error = ::cranelift::codegen::print_errors::pretty_verifier_error(
134 Some(Box::new(writer)),
138 .fatal(&format!("cretonne verify error:\n{}", pretty_error));
143 fn codegen_fn_content<'a, 'tcx: 'a>(fx: &mut FunctionCx<'a, 'tcx, impl Backend>) {
144 for (bb, bb_data) in fx.mir.basic_blocks().iter_enumerated() {
145 let ebb = fx.get_ebb(bb);
146 fx.bcx.switch_to_block(ebb);
149 for stmt in &bb_data.statements {
150 trans_stmt(fx, ebb, stmt);
153 let mut terminator_head = "\n".to_string();
157 .fmt_head(&mut terminator_head)
159 let inst = fx.bcx.func.layout.last_inst(ebb).unwrap();
160 fx.add_comment(inst, terminator_head);
162 match &bb_data.terminator().kind {
163 TerminatorKind::Goto { target } => {
164 let ebb = fx.get_ebb(*target);
165 fx.bcx.ins().jump(ebb, &[]);
167 TerminatorKind::Return => {
168 crate::abi::codegen_return(fx);
170 TerminatorKind::Assert {
177 let cond = trans_operand(fx, cond).load_value(fx);
178 // TODO HACK brz/brnz for i8/i16 is not yet implemented
179 let cond = fx.bcx.ins().uextend(types::I32, cond);
180 let target = fx.get_ebb(*target);
182 fx.bcx.ins().brnz(cond, target, &[]);
184 fx.bcx.ins().brz(cond, target, &[]);
186 fx.bcx.ins().trap(TrapCode::User(!0));
189 TerminatorKind::SwitchInt {
195 // TODO: prevent panics on large and negative disciminants
196 if should_codegen(fx.tcx.sess) {
197 let discr = trans_operand(fx, discr).load_value(fx);
198 let mut jt_data = JumpTableData::new();
199 for (i, value) in values.iter().enumerate() {
200 let ebb = fx.get_ebb(targets[i]);
201 jt_data.set_entry(*value as usize, ebb);
203 let jump_table = fx.bcx.create_jump_table(jt_data);
204 fx.bcx.ins().br_table(discr, jump_table);
205 let otherwise_ebb = fx.get_ebb(targets[targets.len() - 1]);
206 fx.bcx.ins().jump(otherwise_ebb, &[]);
208 fx.bcx.ins().trap(TrapCode::User(0));
211 TerminatorKind::Call {
217 crate::abi::codegen_call(fx, func, args, destination);
219 TerminatorKind::Resume | TerminatorKind::Abort | TerminatorKind::Unreachable => {
220 fx.bcx.ins().trap(TrapCode::User(!0));
222 TerminatorKind::Yield { .. }
223 | TerminatorKind::FalseEdges { .. }
224 | TerminatorKind::FalseUnwind { .. } => {
225 bug!("shouldn't exist at trans {:?}", bb_data.terminator());
227 TerminatorKind::Drop { target, .. } | TerminatorKind::DropAndReplace { target, .. } => {
228 // TODO call drop impl
229 // unimplemented!("terminator {:?}", bb_data.terminator());
230 let target_ebb = fx.get_ebb(*target);
231 fx.bcx.ins().jump(target_ebb, &[]);
233 TerminatorKind::GeneratorDrop => {
234 unimplemented!("terminator GeneratorDrop");
239 fx.bcx.seal_all_blocks();
243 fn trans_stmt<'a, 'tcx: 'a>(
244 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
246 stmt: &Statement<'tcx>,
248 let _print_guard = PrintOnPanic(format!("stmt {:?}", stmt));
250 let inst = fx.bcx.func.layout.last_inst(cur_ebb).unwrap();
251 fx.add_comment(inst, format!("{:?}", stmt));
254 StatementKind::SetDiscriminant {
258 let place = trans_place(fx, place);
259 let layout = place.layout();
260 if layout.for_variant(&*fx, *variant_index).abi == layout::Abi::Uninhabited {
263 match layout.variants {
264 layout::Variants::Single { index } => {
265 assert_eq!(index, *variant_index);
267 layout::Variants::Tagged { .. } => {
268 let ptr = place.place_field(fx, mir::Field::new(0));
273 .discriminant_for_variant(fx.tcx, *variant_index)
275 let discr = CValue::const_val(fx, ptr.layout().ty, to as u64 as i64);
276 ptr.write_cvalue(fx, discr);
278 layout::Variants::NicheFilling {
284 if *variant_index != dataful_variant {
285 let niche = place.place_field(fx, mir::Field::new(0));
286 //let niche_llty = niche.layout.immediate_llvm_type(bx.cx);
287 let niche_value = ((variant_index - *niche_variants.start()) as u128)
288 .wrapping_add(niche_start);
289 // FIXME(eddyb) Check the actual primitive type here.
290 let niche_llval = if niche_value == 0 {
291 CValue::const_val(fx, niche.layout().ty, 0)
293 CValue::const_val(fx, niche.layout().ty, niche_value as u64 as i64)
295 niche.write_cvalue(fx, niche_llval);
300 StatementKind::Assign(to_place, rval) => {
301 let lval = trans_place(fx, to_place);
302 let dest_layout = lval.layout();
304 Rvalue::Use(operand) => {
305 let val = trans_operand(fx, operand);
306 lval.write_cvalue(fx, val);
308 Rvalue::Ref(_, _, place) => {
309 let place = trans_place(fx, place);
310 let addr = place.expect_addr();
311 lval.write_cvalue(fx, CValue::ByVal(addr, dest_layout));
313 Rvalue::BinaryOp(bin_op, lhs, rhs) => {
314 let ty = fx.monomorphize(&lhs.ty(&fx.mir.local_decls, fx.tcx));
315 let lhs = trans_operand(fx, lhs);
316 let rhs = trans_operand(fx, rhs);
318 let res = match ty.sty {
319 TypeVariants::TyBool => {
320 trans_bool_binop(fx, *bin_op, lhs, rhs, lval.layout().ty)
322 TypeVariants::TyUint(_) => {
323 trans_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, false)
325 TypeVariants::TyInt(_) => {
326 trans_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, true)
328 TypeVariants::TyFloat(_) => {
329 trans_float_binop(fx, *bin_op, lhs, rhs, lval.layout().ty)
331 TypeVariants::TyChar => {
332 trans_char_binop(fx, *bin_op, lhs, rhs, lval.layout().ty)
334 TypeVariants::TyRawPtr(..) => {
335 trans_ptr_binop(fx, *bin_op, lhs, rhs, lval.layout().ty)
337 _ => unimplemented!("binop {:?} for {:?}", bin_op, ty),
339 lval.write_cvalue(fx, res);
341 Rvalue::CheckedBinaryOp(bin_op, lhs, rhs) => {
342 let ty = fx.monomorphize(&lhs.ty(&fx.mir.local_decls, fx.tcx));
343 let lhs = trans_operand(fx, lhs);
344 let rhs = trans_operand(fx, rhs);
346 let res = match ty.sty {
347 TypeVariants::TyUint(_) => {
348 trans_checked_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, false)
350 TypeVariants::TyInt(_) => {
351 trans_checked_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, true)
353 _ => unimplemented!("checked binop {:?} for {:?}", bin_op, ty),
355 lval.write_cvalue(fx, res);
357 Rvalue::UnaryOp(un_op, operand) => {
358 let ty = fx.monomorphize(&operand.ty(&fx.mir.local_decls, fx.tcx));
359 let layout = fx.layout_of(ty);
360 let val = trans_operand(fx, operand).load_value(fx);
361 let res = match un_op {
362 UnOp::Not => fx.bcx.ins().bnot(val),
363 UnOp::Neg => match ty.sty {
364 TypeVariants::TyInt(_) => {
365 let clif_ty = fx.cton_type(ty).unwrap();
366 let zero = fx.bcx.ins().iconst(clif_ty, 0);
367 fx.bcx.ins().isub(zero, val)
369 TypeVariants::TyFloat(_) => fx.bcx.ins().fneg(val),
370 _ => unimplemented!("un op Neg for {:?}", ty),
373 lval.write_cvalue(fx, CValue::ByVal(res, layout));
375 Rvalue::Cast(CastKind::ReifyFnPointer, operand, ty) => {
376 let operand = trans_operand(fx, operand);
377 let layout = fx.layout_of(ty);
378 lval.write_cvalue(fx, operand.unchecked_cast_to(layout));
380 Rvalue::Cast(CastKind::UnsafeFnPointer, operand, ty) => {
381 let operand = trans_operand(fx, operand);
382 let layout = fx.layout_of(ty);
383 lval.write_cvalue(fx, operand.unchecked_cast_to(layout));
385 Rvalue::Cast(CastKind::Misc, operand, to_ty) => {
386 let operand = trans_operand(fx, operand);
387 let from_ty = operand.layout().ty;
388 match (&from_ty.sty, &to_ty.sty) {
389 (TypeVariants::TyRef(..), TypeVariants::TyRef(..))
390 | (TypeVariants::TyRef(..), TypeVariants::TyRawPtr(..))
391 | (TypeVariants::TyRawPtr(..), TypeVariants::TyRef(..))
392 | (TypeVariants::TyRawPtr(..), TypeVariants::TyRawPtr(..)) => {
393 lval.write_cvalue(fx, operand.unchecked_cast_to(dest_layout));
395 (TypeVariants::TyRawPtr(..), TypeVariants::TyUint(_))
396 | (TypeVariants::TyFnPtr(..), TypeVariants::TyUint(_))
397 if to_ty.sty == fx.tcx.types.usize.sty =>
399 lval.write_cvalue(fx, operand.unchecked_cast_to(dest_layout));
401 (TypeVariants::TyUint(_), TypeVariants::TyRawPtr(..))
402 if from_ty.sty == fx.tcx.types.usize.sty =>
404 lval.write_cvalue(fx, operand.unchecked_cast_to(dest_layout));
406 (TypeVariants::TyChar, TypeVariants::TyUint(_))
407 | (TypeVariants::TyUint(_), TypeVariants::TyChar)
408 | (TypeVariants::TyUint(_), TypeVariants::TyInt(_))
409 | (TypeVariants::TyUint(_), TypeVariants::TyUint(_)) => {
410 let from = operand.load_value(fx);
411 let res = crate::common::cton_intcast(
414 fx.cton_type(to_ty).unwrap(),
417 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
419 (TypeVariants::TyInt(_), TypeVariants::TyInt(_))
420 | (TypeVariants::TyInt(_), TypeVariants::TyUint(_)) => {
421 let from = operand.load_value(fx);
422 let res = crate::common::cton_intcast(
425 fx.cton_type(to_ty).unwrap(),
428 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
430 (TypeVariants::TyFloat(from_flt), TypeVariants::TyFloat(to_flt)) => {
431 let from = operand.load_value(fx);
432 let res = match (from_flt, to_flt) {
433 (FloatTy::F32, FloatTy::F64) => {
434 fx.bcx.ins().fpromote(types::F64, from)
436 (FloatTy::F64, FloatTy::F32) => {
437 fx.bcx.ins().fdemote(types::F32, from)
441 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
443 (TypeVariants::TyInt(_), TypeVariants::TyFloat(_)) => {
444 let from = operand.load_value(fx);
445 let f_type = fx.cton_type(to_ty).unwrap();
446 let res = fx.bcx.ins().fcvt_from_sint(f_type, from);
447 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
449 (TypeVariants::TyUint(_), TypeVariants::TyFloat(_)) => {
450 let from = operand.load_value(fx);
451 let f_type = fx.cton_type(to_ty).unwrap();
452 let res = fx.bcx.ins().fcvt_from_uint(f_type, from);
453 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
455 (TypeVariants::TyBool, TypeVariants::TyUint(_))
456 | (TypeVariants::TyBool, TypeVariants::TyInt(_)) => {
457 let to_ty = fx.cton_type(to_ty).unwrap();
458 let from = operand.load_value(fx);
459 let res = if to_ty != types::I8 {
460 fx.bcx.ins().uextend(to_ty, from)
464 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
466 _ => unimpl!("rval misc {:?} {:?}", from_ty, to_ty),
469 Rvalue::Cast(CastKind::ClosureFnPointer, operand, ty) => {
470 unimplemented!("rval closure_fn_ptr {:?} {:?}", operand, ty)
472 Rvalue::Cast(CastKind::Unsize, operand, ty) => {
473 unimpl!("rval unsize {:?} {:?}", operand, ty);
475 Rvalue::Discriminant(place) => {
476 let place = trans_place(fx, place).to_cvalue(fx);
477 let discr = trans_get_discriminant(fx, place, dest_layout);
478 lval.write_cvalue(fx, discr);
480 Rvalue::Repeat(operand, times) => {
481 let operand = trans_operand(fx, operand);
483 let index = fx.bcx.ins().iconst(types::I64, i as i64);
484 let to = lval.place_index(fx, index);
485 to.write_cvalue(fx, operand);
488 Rvalue::Len(lval) => unimpl!("rval len {:?}", lval),
489 Rvalue::NullaryOp(NullOp::Box, ty) => unimplemented!("rval box {:?}", ty),
490 Rvalue::NullaryOp(NullOp::SizeOf, ty) => {
494 .is_sized(fx.tcx.at(DUMMY_SP), ParamEnv::reveal_all())
496 let ty_size = fx.layout_of(ty).size.bytes();
497 let val = CValue::const_val(fx, fx.tcx.types.usize, ty_size as i64);
498 lval.write_cvalue(fx, val);
500 Rvalue::Aggregate(kind, operands) => match **kind {
501 AggregateKind::Array(_ty) => {
502 for (i, operand) in operands.into_iter().enumerate() {
503 let operand = trans_operand(fx, operand);
504 let index = fx.bcx.ins().iconst(types::I64, i as i64);
505 let to = lval.place_index(fx, index);
506 to.write_cvalue(fx, operand);
509 _ => unimpl!("shouldn't exist at trans {:?}", rval),
513 StatementKind::StorageLive(_)
514 | StatementKind::StorageDead(_)
516 | StatementKind::ReadForMatch(_)
517 | StatementKind::Validate(_, _)
518 | StatementKind::EndRegion(_)
519 | StatementKind::UserAssertTy(_, _) => {}
521 StatementKind::InlineAsm { .. } => unimpl!("Inline assembly is not supported"),
525 pub fn trans_get_discriminant<'a, 'tcx: 'a>(
526 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
528 dest_layout: TyLayout<'tcx>,
530 let layout = value.layout();
532 if layout.abi == layout::Abi::Uninhabited {
533 fx.bcx.ins().trap(TrapCode::User(!0));
535 match layout.variants {
536 layout::Variants::Single { index } => {
537 let discr_val = layout.ty.ty_adt_def().map_or(index as u128, |def| {
538 def.discriminant_for_variant(fx.tcx, index).val
540 return CValue::const_val(fx, dest_layout.ty, discr_val as u64 as i64);
542 layout::Variants::Tagged { .. } | layout::Variants::NicheFilling { .. } => {}
545 let discr = value.value_field(fx, mir::Field::new(0));
546 let discr_ty = discr.layout().ty;
547 let lldiscr = discr.load_value(fx);
548 match layout.variants {
549 layout::Variants::Single { .. } => bug!(),
550 layout::Variants::Tagged { ref tag, .. } => {
551 let signed = match tag.value {
552 layout::Int(_, signed) => signed,
555 let val = cton_intcast(fx, lldiscr, fx.cton_type(dest_layout.ty).unwrap(), signed);
556 return CValue::ByVal(val, dest_layout);
558 layout::Variants::NicheFilling {
564 let niche_llty = fx.cton_type(discr_ty).unwrap();
565 let dest_cton_ty = fx.cton_type(dest_layout.ty).unwrap();
566 if niche_variants.start() == niche_variants.end() {
570 .icmp_imm(IntCC::Equal, lldiscr, niche_start as u64 as i64);
574 .iconst(dest_cton_ty, *niche_variants.start() as u64 as i64);
578 .iconst(dest_cton_ty, dataful_variant as u64 as i64);
579 let val = fx.bcx.ins().select(b, if_true, if_false);
580 return CValue::ByVal(val, dest_layout);
582 // Rebase from niche values to discriminant values.
583 let delta = niche_start.wrapping_sub(*niche_variants.start() as u128);
584 let delta = fx.bcx.ins().iconst(niche_llty, delta as u64 as i64);
585 let lldiscr = fx.bcx.ins().isub(lldiscr, delta);
586 let b = fx.bcx.ins().icmp_imm(
587 IntCC::UnsignedLessThanOrEqual,
589 *niche_variants.end() as u64 as i64,
592 cton_intcast(fx, lldiscr, fx.cton_type(dest_layout.ty).unwrap(), false);
596 .iconst(dest_cton_ty, dataful_variant as u64 as i64);
597 let val = fx.bcx.ins().select(b, if_true, if_false);
598 return CValue::ByVal(val, dest_layout);
604 macro_rules! binop_match {
605 (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, bug) => {
606 bug!("binop {} on {} lhs: {:?} rhs: {:?}", stringify!($var), $bug_fmt, $lhs, $rhs)
608 (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, icmp($cc:ident)) => {{
609 assert_eq!($fx.tcx.types.bool, $ret_ty);
610 let ret_layout = $fx.layout_of($ret_ty);
612 // TODO HACK no encoding for icmp.i8
613 use crate::common::cton_intcast;
615 cton_intcast($fx, $lhs, types::I64, $signed),
616 cton_intcast($fx, $rhs, types::I64, $signed),
618 let b = $fx.bcx.ins().icmp(IntCC::$cc, lhs, rhs);
620 CValue::ByVal($fx.bcx.ins().bint(types::I8, b), ret_layout)
622 (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, fcmp($cc:ident)) => {{
623 assert_eq!($fx.tcx.types.bool, $ret_ty);
624 let ret_layout = $fx.layout_of($ret_ty);
625 let b = $fx.bcx.ins().fcmp(FloatCC::$cc, $lhs, $rhs);
626 CValue::ByVal($fx.bcx.ins().bint(types::I8, b), ret_layout)
628 (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, custom(|| $body:expr)) => {{
631 (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, $name:ident) => {{
632 let ret_layout = $fx.layout_of($ret_ty);
633 CValue::ByVal($fx.bcx.ins().$name($lhs, $rhs), ret_layout)
636 $fx:expr, $bin_op:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, $bug_fmt:expr;
638 $var:ident ($sign:pat) $name:tt $( ( $($next:tt)* ) )? ;
641 let lhs = $lhs.load_value($fx);
642 let rhs = $rhs.load_value($fx);
643 match ($bin_op, $signed) {
645 (BinOp::$var, $sign) => binop_match!(@single $fx, $bug_fmt, $var, $signed, lhs, rhs, $ret_ty, $name $( ( $($next)* ) )?),
651 fn trans_bool_binop<'a, 'tcx: 'a>(
652 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
658 let res = binop_match! {
659 fx, bin_op, false, lhs, rhs, ty, "bool";
672 Lt (_) icmp(UnsignedLessThan);
673 Le (_) icmp(UnsignedLessThanOrEqual);
674 Ne (_) icmp(NotEqual);
675 Ge (_) icmp(UnsignedGreaterThanOrEqual);
676 Gt (_) icmp(UnsignedGreaterThan);
684 pub fn trans_int_binop<'a, 'tcx: 'a>(
685 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
692 if bin_op != BinOp::Shl && bin_op != BinOp::Shr {
696 "int binop requires lhs and rhs of same type"
700 fx, bin_op, signed, lhs, rhs, out_ty, "int/uint";
716 Lt (false) icmp(UnsignedLessThan);
717 Lt (true) icmp(SignedLessThan);
718 Le (false) icmp(UnsignedLessThanOrEqual);
719 Le (true) icmp(SignedLessThanOrEqual);
720 Ne (_) icmp(NotEqual);
721 Ge (false) icmp(UnsignedGreaterThanOrEqual);
722 Ge (true) icmp(SignedGreaterThanOrEqual);
723 Gt (false) icmp(UnsignedGreaterThan);
724 Gt (true) icmp(SignedGreaterThan);
730 pub fn trans_checked_int_binop<'a, 'tcx: 'a>(
731 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
738 if bin_op != BinOp::Shl && bin_op != BinOp::Shr {
742 "checked int binop requires lhs and rhs of same type"
745 let res_ty = match out_ty.sty {
746 TypeVariants::TyTuple(tys) => tys[0],
748 "Checked int binop requires tuple as output, but got {:?}",
753 let res = binop_match! {
754 fx, bin_op, signed, lhs, rhs, res_ty, "checked int/uint";
777 // TODO: check for overflow
778 let has_overflow = CValue::const_val(fx, fx.tcx.types.bool, 0);
780 let out_place = CPlace::temp(fx, out_ty);
782 .place_field(fx, mir::Field::new(0))
783 .write_cvalue(fx, res);
785 .place_field(fx, mir::Field::new(1))
786 .write_cvalue(fx, has_overflow);
788 out_place.to_cvalue(fx)
791 fn trans_float_binop<'a, 'tcx: 'a>(
792 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
798 let res = binop_match! {
799 fx, bin_op, false, lhs, rhs, ty, "float";
805 assert_eq!(lhs.layout().ty, ty);
806 assert_eq!(rhs.layout().ty, ty);
808 TypeVariants::TyFloat(FloatTy::F32) => fx.easy_call("fmodf", &[lhs, rhs], ty),
809 TypeVariants::TyFloat(FloatTy::F64) => fx.easy_call("fmod", &[lhs, rhs], ty),
820 Lt (_) fcmp(LessThan);
821 Le (_) fcmp(LessThanOrEqual);
822 Ne (_) fcmp(NotEqual);
823 Ge (_) fcmp(GreaterThanOrEqual);
824 Gt (_) fcmp(GreaterThan);
832 fn trans_char_binop<'a, 'tcx: 'a>(
833 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
839 let res = binop_match! {
840 fx, bin_op, false, lhs, rhs, ty, "char";
853 Lt (_) icmp(UnsignedLessThan);
854 Le (_) icmp(UnsignedLessThanOrEqual);
855 Ne (_) icmp(NotEqual);
856 Ge (_) icmp(UnsignedGreaterThanOrEqual);
857 Gt (_) icmp(UnsignedGreaterThan);
865 fn trans_ptr_binop<'a, 'tcx: 'a>(
866 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
872 match lhs.layout().ty.sty {
873 TypeVariants::TyRawPtr(TypeAndMut { ty, mutbl: _ }) => {
874 if !ty.is_sized(fx.tcx.at(DUMMY_SP), ParamEnv::reveal_all()) {
875 unimpl!("Unsized values are not yet implemented");
878 _ => bug!("trans_ptr_binop on non ptr"),
881 fx, bin_op, false, lhs, rhs, ty, "ptr";
894 Lt (_) icmp(UnsignedLessThan);
895 Le (_) icmp(UnsignedLessThanOrEqual);
896 Ne (_) icmp(NotEqual);
897 Ge (_) icmp(UnsignedGreaterThanOrEqual);
898 Gt (_) icmp(UnsignedGreaterThan);
904 pub fn trans_place<'a, 'tcx: 'a>(
905 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
909 Place::Local(local) => fx.get_local_place(*local),
910 Place::Promoted(promoted) => crate::constant::trans_promoted(fx, promoted.0),
911 Place::Static(static_) => crate::constant::codegen_static_ref(fx, static_),
912 Place::Projection(projection) => {
913 let base = trans_place(fx, &projection.base);
914 match projection.elem {
915 ProjectionElem::Deref => {
916 let layout = fx.layout_of(place.ty(&*fx.mir, fx.tcx).to_ty(fx.tcx));
917 if layout.is_unsized() {
918 unimpl!("Unsized places are not yet implemented");
920 CPlace::Addr(base.to_cvalue(fx).load_value(fx), layout)
922 ProjectionElem::Field(field, _ty) => base.place_field(fx, field),
923 ProjectionElem::Index(local) => {
924 let index = fx.get_local_place(local).to_cvalue(fx).load_value(fx);
925 base.place_index(fx, index)
927 ProjectionElem::ConstantIndex {
932 "projection const index {:?} offset {:?} not from end",
936 ProjectionElem::ConstantIndex {
941 "projection const index {:?} offset {:?} from end",
945 ProjectionElem::Subslice { from, to } => unimplemented!(
946 "projection subslice {:?} from {} to {}",
951 ProjectionElem::Downcast(_adt_def, variant) => base.downcast_variant(fx, variant),
957 pub fn trans_operand<'a, 'tcx>(
958 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
959 operand: &Operand<'tcx>,
962 Operand::Move(place) | Operand::Copy(place) => {
963 let cplace = trans_place(fx, place);
966 Operand::Constant(const_) => crate::constant::trans_constant(fx, const_),