3 pub fn trans_mono_item<'a, 'tcx: 'a>(cx: &mut CodegenCx<'a, 'tcx>, mono_item: MonoItem<'tcx>) {
5 let context = &mut cx.context;
8 MonoItem::Fn(inst) => match inst {
10 def: InstanceDef::Item(def_id),
13 let mut mir = ::std::io::Cursor::new(Vec::new());
14 ::rustc_mir::util::write_mir_pretty(tcx, Some(def_id), &mut mir).unwrap();
15 tcx.sess.warn(&format!(
18 String::from_utf8_lossy(&mir.into_inner())
21 let res = each_module!(cx, |(ccx, m)| trans_fn(tcx, *m, ccx, context, inst));
22 if let Some(func_id) = res.jit {
23 cx.defined_functions.push(func_id);
27 def: InstanceDef::DropGlue(_, _),
29 } => unimpl!("Unimplemented drop glue instance"),
30 inst => unimpl!("Unimplemented instance {:?}", inst),
32 MonoItem::Static(def_id) => {
33 each_module!(cx, |(ccx, _m)| {
34 crate::constant::codegen_static(ccx, def_id);
37 MonoItem::GlobalAsm(node_id) => cx
40 .fatal(&format!("Unimplemented global asm mono item {:?}", node_id)),
44 fn trans_fn<'a, 'tcx: 'a>(
45 tcx: TyCtxt<'a, 'tcx, 'tcx>,
46 module: &mut Module<impl Backend>,
47 constants: &mut crate::constant::ConstantCx,
48 context: &mut Context,
49 instance: Instance<'tcx>,
52 let mir = tcx.optimized_mir(instance.def_id());
54 // Step 2. Declare function
55 let (name, sig) = get_function_name_and_sig(tcx, instance);
57 .declare_function(&name, Linkage::Export, &sig)
60 // Step 3. Make FunctionBuilder
61 let mut func = Function::with_name_signature(ExternalName::user(0, 0), sig);
62 let mut func_ctx = FunctionBuilderContext::new();
63 let mut bcx: FunctionBuilder = FunctionBuilder::new(&mut func, &mut func_ctx);
65 // Step 4. Predefine ebb's
66 let start_ebb = bcx.create_ebb();
67 let mut ebb_map: HashMap<BasicBlock, Ebb> = HashMap::new();
68 for (bb, _bb_data) in mir.basic_blocks().iter_enumerated() {
69 ebb_map.insert(bb, bcx.create_ebb());
72 // Step 5. Make FunctionCx
73 let mut fx = FunctionCx {
80 assert!(!instance.substs.needs_infer());
84 local_map: HashMap::new(),
85 comments: HashMap::new(),
89 // Step 6. Codegen function
90 crate::abi::codegen_fn_prelude(&mut fx, start_ebb);
91 codegen_fn_content(&mut fx);
92 fx.bcx.seal_all_blocks();
95 // Step 7. Print function to terminal for debugging
96 let mut writer = crate::pretty_clif::CommentWriter(fx.comments);
97 let mut cton = String::new();
98 ::cranelift::codegen::write::decorate_function(&mut writer, &mut cton, &func, None).unwrap();
101 // Step 8. Verify function
102 verify_func(tcx, writer, &func);
104 // Step 9. Define function
105 // TODO: cranelift doesn't yet support some of the things needed
106 if should_codegen(tcx.sess) {
108 module.define_function(func_id, context).unwrap();
115 fn verify_func(tcx: TyCtxt, writer: crate::pretty_clif::CommentWriter, func: &Function) {
116 let flags = settings::Flags::new(settings::builder());
117 match ::cranelift::codegen::verify_function(&func, &flags) {
120 tcx.sess.err(&format!("{:?}", err));
121 let pretty_error = ::cranelift::codegen::print_errors::pretty_verifier_error(
124 Some(Box::new(writer)),
128 .fatal(&format!("cretonne verify error:\n{}", pretty_error));
133 fn codegen_fn_content<'a, 'tcx: 'a>(fx: &mut FunctionCx<'a, 'tcx, impl Backend>) {
134 for (bb, bb_data) in fx.mir.basic_blocks().iter_enumerated() {
135 let ebb = fx.get_ebb(bb);
136 fx.bcx.switch_to_block(ebb);
139 for stmt in &bb_data.statements {
140 trans_stmt(fx, ebb, stmt);
143 let mut terminator_head = "\n".to_string();
147 .fmt_head(&mut terminator_head)
149 let inst = fx.bcx.func.layout.last_inst(ebb).unwrap();
150 fx.add_comment(inst, terminator_head);
152 match &bb_data.terminator().kind {
153 TerminatorKind::Goto { target } => {
154 let ebb = fx.get_ebb(*target);
155 fx.bcx.ins().jump(ebb, &[]);
157 TerminatorKind::Return => {
158 crate::abi::codegen_return(fx);
160 TerminatorKind::Assert {
167 let cond = trans_operand(fx, cond).load_value(fx);
168 // TODO HACK brz/brnz for i8/i16 is not yet implemented
169 let cond = fx.bcx.ins().uextend(types::I32, cond);
170 let target = fx.get_ebb(*target);
172 fx.bcx.ins().brnz(cond, target, &[]);
174 fx.bcx.ins().brz(cond, target, &[]);
176 fx.bcx.ins().trap(TrapCode::User(!0));
179 TerminatorKind::SwitchInt {
185 // TODO: prevent panics on large and negative disciminants
186 if should_codegen(fx.tcx.sess) {
187 let discr = trans_operand(fx, discr).load_value(fx);
188 let mut jt_data = JumpTableData::new();
189 for (i, value) in values.iter().enumerate() {
190 let ebb = fx.get_ebb(targets[i]);
191 jt_data.set_entry(*value as usize, ebb);
193 let jump_table = fx.bcx.create_jump_table(jt_data);
194 fx.bcx.ins().br_table(discr, jump_table);
195 let otherwise_ebb = fx.get_ebb(targets[targets.len() - 1]);
196 fx.bcx.ins().jump(otherwise_ebb, &[]);
198 fx.bcx.ins().trap(TrapCode::User(0));
201 TerminatorKind::Call {
207 crate::abi::codegen_call(fx, func, args, destination);
209 TerminatorKind::Resume | TerminatorKind::Abort | TerminatorKind::Unreachable => {
210 fx.bcx.ins().trap(TrapCode::User(!0));
212 TerminatorKind::Yield { .. }
213 | TerminatorKind::FalseEdges { .. }
214 | TerminatorKind::FalseUnwind { .. } => {
215 bug!("shouldn't exist at trans {:?}", bb_data.terminator());
217 TerminatorKind::Drop { target, .. } | TerminatorKind::DropAndReplace { target, .. } => {
218 // TODO call drop impl
219 // unimplemented!("terminator {:?}", bb_data.terminator());
220 let target_ebb = fx.get_ebb(*target);
221 fx.bcx.ins().jump(target_ebb, &[]);
223 TerminatorKind::GeneratorDrop => {
224 unimplemented!("terminator GeneratorDrop");
229 fx.bcx.seal_all_blocks();
233 fn trans_stmt<'a, 'tcx: 'a>(
234 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
236 stmt: &Statement<'tcx>,
238 fx.tcx.sess.warn(&format!("stmt {:?}", stmt));
240 let inst = fx.bcx.func.layout.last_inst(cur_ebb).unwrap();
241 fx.add_comment(inst, format!("{:?}", stmt));
244 StatementKind::SetDiscriminant {
248 let place = trans_place(fx, place);
249 let layout = place.layout();
250 if layout.for_variant(&*fx, *variant_index).abi == layout::Abi::Uninhabited {
253 match layout.variants {
254 layout::Variants::Single { index } => {
255 assert_eq!(index, *variant_index);
257 layout::Variants::Tagged { .. } => {
258 let ptr = place.place_field(fx, mir::Field::new(0));
263 .discriminant_for_variant(fx.tcx, *variant_index)
265 let discr = CValue::const_val(fx, ptr.layout().ty, to as u64 as i64);
266 ptr.write_cvalue(fx, discr);
268 layout::Variants::NicheFilling {
274 if *variant_index != dataful_variant {
275 let niche = place.place_field(fx, mir::Field::new(0));
276 //let niche_llty = niche.layout.immediate_llvm_type(bx.cx);
277 let niche_value = ((variant_index - *niche_variants.start()) as u128)
278 .wrapping_add(niche_start);
279 // FIXME(eddyb) Check the actual primitive type here.
280 let niche_llval = if niche_value == 0 {
281 CValue::const_val(fx, niche.layout().ty, 0)
283 CValue::const_val(fx, niche.layout().ty, niche_value as u64 as i64)
285 niche.write_cvalue(fx, niche_llval);
290 StatementKind::Assign(to_place, rval) => {
291 let lval = trans_place(fx, to_place);
292 let dest_layout = lval.layout();
294 Rvalue::Use(operand) => {
295 let val = trans_operand(fx, operand);
296 lval.write_cvalue(fx, val);
298 Rvalue::Ref(_, _, place) => {
299 let place = trans_place(fx, place);
300 let addr = place.expect_addr();
301 lval.write_cvalue(fx, CValue::ByVal(addr, dest_layout));
303 Rvalue::BinaryOp(bin_op, lhs, rhs) => {
304 let ty = fx.monomorphize(&lhs.ty(&fx.mir.local_decls, fx.tcx));
305 let lhs = trans_operand(fx, lhs);
306 let rhs = trans_operand(fx, rhs);
308 let res = match ty.sty {
309 TypeVariants::TyBool => {
310 trans_bool_binop(fx, *bin_op, lhs, rhs, lval.layout().ty)
312 TypeVariants::TyUint(_) => {
313 trans_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, false)
315 TypeVariants::TyInt(_) => {
316 trans_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, true)
318 TypeVariants::TyFloat(_) => {
319 trans_float_binop(fx, *bin_op, lhs, rhs, lval.layout().ty)
321 TypeVariants::TyChar => {
322 trans_char_binop(fx, *bin_op, lhs, rhs, lval.layout().ty)
324 TypeVariants::TyRawPtr(..) => {
325 trans_ptr_binop(fx, *bin_op, lhs, rhs, lval.layout().ty)
327 _ => unimplemented!("binop {:?} for {:?}", bin_op, ty),
329 lval.write_cvalue(fx, res);
331 Rvalue::CheckedBinaryOp(bin_op, lhs, rhs) => {
332 let ty = fx.monomorphize(&lhs.ty(&fx.mir.local_decls, fx.tcx));
333 let lhs = trans_operand(fx, lhs);
334 let rhs = trans_operand(fx, rhs);
336 let res = match ty.sty {
337 TypeVariants::TyUint(_) => {
338 trans_checked_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, false)
340 TypeVariants::TyInt(_) => {
341 trans_checked_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, true)
343 _ => unimplemented!("checked binop {:?} for {:?}", bin_op, ty),
345 lval.write_cvalue(fx, res);
347 Rvalue::UnaryOp(un_op, operand) => {
348 let ty = fx.monomorphize(&operand.ty(&fx.mir.local_decls, fx.tcx));
349 let layout = fx.layout_of(ty);
350 let val = trans_operand(fx, operand).load_value(fx);
351 let res = match un_op {
352 UnOp::Not => fx.bcx.ins().bnot(val),
353 UnOp::Neg => match ty.sty {
354 TypeVariants::TyInt(_) => {
355 let clif_ty = fx.cton_type(ty).unwrap();
356 let zero = fx.bcx.ins().iconst(clif_ty, 0);
357 fx.bcx.ins().isub(zero, val)
359 TypeVariants::TyFloat(_) => fx.bcx.ins().fneg(val),
360 _ => unimplemented!("un op Neg for {:?}", ty),
363 lval.write_cvalue(fx, CValue::ByVal(res, layout));
365 Rvalue::Cast(CastKind::ReifyFnPointer, operand, ty) => {
366 let operand = trans_operand(fx, operand);
367 let layout = fx.layout_of(ty);
368 lval.write_cvalue(fx, operand.unchecked_cast_to(layout));
370 Rvalue::Cast(CastKind::UnsafeFnPointer, operand, ty) => {
371 let operand = trans_operand(fx, operand);
372 let layout = fx.layout_of(ty);
373 lval.write_cvalue(fx, operand.unchecked_cast_to(layout));
375 Rvalue::Cast(CastKind::Misc, operand, to_ty) => {
376 let operand = trans_operand(fx, operand);
377 let from_ty = operand.layout().ty;
378 match (&from_ty.sty, &to_ty.sty) {
379 (TypeVariants::TyRef(..), TypeVariants::TyRef(..))
380 | (TypeVariants::TyRef(..), TypeVariants::TyRawPtr(..))
381 | (TypeVariants::TyRawPtr(..), TypeVariants::TyRef(..))
382 | (TypeVariants::TyRawPtr(..), TypeVariants::TyRawPtr(..)) => {
383 lval.write_cvalue(fx, operand.unchecked_cast_to(dest_layout));
385 (TypeVariants::TyRawPtr(..), TypeVariants::TyUint(_))
386 | (TypeVariants::TyFnPtr(..), TypeVariants::TyUint(_))
387 if to_ty.sty == fx.tcx.types.usize.sty =>
389 lval.write_cvalue(fx, operand.unchecked_cast_to(dest_layout));
391 (TypeVariants::TyUint(_), TypeVariants::TyRawPtr(..))
392 if from_ty.sty == fx.tcx.types.usize.sty =>
394 lval.write_cvalue(fx, operand.unchecked_cast_to(dest_layout));
396 (TypeVariants::TyChar, TypeVariants::TyUint(_))
397 | (TypeVariants::TyUint(_), TypeVariants::TyChar)
398 | (TypeVariants::TyUint(_), TypeVariants::TyInt(_))
399 | (TypeVariants::TyUint(_), TypeVariants::TyUint(_)) => {
400 let from = operand.load_value(fx);
401 let res = crate::common::cton_intcast(
404 fx.cton_type(to_ty).unwrap(),
407 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
409 (TypeVariants::TyInt(_), TypeVariants::TyInt(_))
410 | (TypeVariants::TyInt(_), TypeVariants::TyUint(_)) => {
411 let from = operand.load_value(fx);
412 let res = crate::common::cton_intcast(
415 fx.cton_type(to_ty).unwrap(),
418 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
420 (TypeVariants::TyFloat(from_flt), TypeVariants::TyFloat(to_flt)) => {
421 let from = operand.load_value(fx);
422 let res = match (from_flt, to_flt) {
423 (FloatTy::F32, FloatTy::F64) => {
424 fx.bcx.ins().fpromote(types::F64, from)
426 (FloatTy::F64, FloatTy::F32) => {
427 fx.bcx.ins().fdemote(types::F32, from)
431 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
433 (TypeVariants::TyInt(_), TypeVariants::TyFloat(_)) => {
434 let from = operand.load_value(fx);
435 let f_type = fx.cton_type(to_ty).unwrap();
436 let res = fx.bcx.ins().fcvt_from_sint(f_type, from);
437 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
439 (TypeVariants::TyUint(_), TypeVariants::TyFloat(_)) => {
440 let from = operand.load_value(fx);
441 let f_type = fx.cton_type(to_ty).unwrap();
442 let res = fx.bcx.ins().fcvt_from_uint(f_type, from);
443 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
445 (TypeVariants::TyBool, TypeVariants::TyUint(_))
446 | (TypeVariants::TyBool, TypeVariants::TyInt(_)) => {
447 let to_ty = fx.cton_type(to_ty).unwrap();
448 let from = operand.load_value(fx);
449 let res = if to_ty != types::I8 {
450 fx.bcx.ins().uextend(to_ty, from)
454 lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
456 _ => unimpl!("rval misc {:?} {:?}", from_ty, to_ty),
459 Rvalue::Cast(CastKind::ClosureFnPointer, operand, ty) => {
460 unimplemented!("rval closure_fn_ptr {:?} {:?}", operand, ty)
462 Rvalue::Cast(CastKind::Unsize, operand, ty) => {
463 unimpl!("rval unsize {:?} {:?}", operand, ty);
465 Rvalue::Discriminant(place) => {
466 let place = trans_place(fx, place).to_cvalue(fx);
467 let discr = trans_get_discriminant(fx, place, dest_layout);
468 lval.write_cvalue(fx, discr);
470 Rvalue::Repeat(operand, times) => {
471 let operand = trans_operand(fx, operand);
473 let index = fx.bcx.ins().iconst(types::I64, i as i64);
474 let to = lval.place_index(fx, index);
475 to.write_cvalue(fx, operand);
478 Rvalue::Len(lval) => unimpl!("rval len {:?}", lval),
479 Rvalue::NullaryOp(NullOp::Box, ty) => unimplemented!("rval box {:?}", ty),
480 Rvalue::NullaryOp(NullOp::SizeOf, ty) => {
484 .is_sized(fx.tcx.at(DUMMY_SP), ParamEnv::reveal_all())
486 let ty_size = fx.layout_of(ty).size.bytes();
487 let val = CValue::const_val(fx, fx.tcx.types.usize, ty_size as i64);
488 lval.write_cvalue(fx, val);
490 Rvalue::Aggregate(kind, operands) => match **kind {
491 AggregateKind::Array(_ty) => {
492 for (i, operand) in operands.into_iter().enumerate() {
493 let operand = trans_operand(fx, operand);
494 let index = fx.bcx.ins().iconst(types::I64, i as i64);
495 let to = lval.place_index(fx, index);
496 to.write_cvalue(fx, operand);
499 _ => unimpl!("shouldn't exist at trans {:?}", rval),
503 StatementKind::StorageLive(_)
504 | StatementKind::StorageDead(_)
506 | StatementKind::ReadForMatch(_)
507 | StatementKind::Validate(_, _)
508 | StatementKind::EndRegion(_)
509 | StatementKind::UserAssertTy(_, _) => {}
511 StatementKind::InlineAsm { .. } => unimpl!("Inline assembly is not supported"),
515 pub fn trans_get_discriminant<'a, 'tcx: 'a>(
516 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
518 dest_layout: TyLayout<'tcx>,
520 let layout = value.layout();
522 if layout.abi == layout::Abi::Uninhabited {
523 fx.bcx.ins().trap(TrapCode::User(!0));
525 match layout.variants {
526 layout::Variants::Single { index } => {
527 let discr_val = layout.ty.ty_adt_def().map_or(index as u128, |def| {
528 def.discriminant_for_variant(fx.tcx, index).val
530 return CValue::const_val(fx, dest_layout.ty, discr_val as u64 as i64);
532 layout::Variants::Tagged { .. } | layout::Variants::NicheFilling { .. } => {}
535 let discr = value.value_field(fx, mir::Field::new(0));
536 let discr_ty = discr.layout().ty;
537 let lldiscr = discr.load_value(fx);
538 match layout.variants {
539 layout::Variants::Single { .. } => bug!(),
540 layout::Variants::Tagged { ref tag, .. } => {
541 let signed = match tag.value {
542 layout::Int(_, signed) => signed,
545 let val = cton_intcast(fx, lldiscr, fx.cton_type(dest_layout.ty).unwrap(), signed);
546 return CValue::ByVal(val, dest_layout);
548 layout::Variants::NicheFilling {
554 let niche_llty = fx.cton_type(discr_ty).unwrap();
555 let dest_cton_ty = fx.cton_type(dest_layout.ty).unwrap();
556 if niche_variants.start() == niche_variants.end() {
560 .icmp_imm(IntCC::Equal, lldiscr, niche_start as u64 as i64);
564 .iconst(dest_cton_ty, *niche_variants.start() as u64 as i64);
568 .iconst(dest_cton_ty, dataful_variant as u64 as i64);
569 let val = fx.bcx.ins().select(b, if_true, if_false);
570 return CValue::ByVal(val, dest_layout);
572 // Rebase from niche values to discriminant values.
573 let delta = niche_start.wrapping_sub(*niche_variants.start() as u128);
574 let delta = fx.bcx.ins().iconst(niche_llty, delta as u64 as i64);
575 let lldiscr = fx.bcx.ins().isub(lldiscr, delta);
576 let b = fx.bcx.ins().icmp_imm(
577 IntCC::UnsignedLessThanOrEqual,
579 *niche_variants.end() as u64 as i64,
582 cton_intcast(fx, lldiscr, fx.cton_type(dest_layout.ty).unwrap(), false);
586 .iconst(dest_cton_ty, dataful_variant as u64 as i64);
587 let val = fx.bcx.ins().select(b, if_true, if_false);
588 return CValue::ByVal(val, dest_layout);
594 macro_rules! binop_match {
595 (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, bug) => {
596 bug!("binop {} on {} lhs: {:?} rhs: {:?}", stringify!($var), $bug_fmt, $lhs, $rhs)
598 (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, icmp($cc:ident)) => {{
599 assert_eq!($fx.tcx.types.bool, $ret_ty);
600 let ret_layout = $fx.layout_of($ret_ty);
602 // TODO HACK no encoding for icmp.i8
603 use crate::common::cton_intcast;
605 cton_intcast($fx, $lhs, types::I64, $signed),
606 cton_intcast($fx, $rhs, types::I64, $signed),
608 let b = $fx.bcx.ins().icmp(IntCC::$cc, lhs, rhs);
610 CValue::ByVal($fx.bcx.ins().bint(types::I8, b), ret_layout)
612 (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, fcmp($cc:ident)) => {{
613 assert_eq!($fx.tcx.types.bool, $ret_ty);
614 let ret_layout = $fx.layout_of($ret_ty);
615 let b = $fx.bcx.ins().fcmp(FloatCC::$cc, $lhs, $rhs);
616 CValue::ByVal($fx.bcx.ins().bint(types::I8, b), ret_layout)
618 (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, custom(|| $body:expr)) => {{
621 (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, $name:ident) => {{
622 let ret_layout = $fx.layout_of($ret_ty);
623 CValue::ByVal($fx.bcx.ins().$name($lhs, $rhs), ret_layout)
626 $fx:expr, $bin_op:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, $bug_fmt:expr;
628 $var:ident ($sign:pat) $name:tt $( ( $($next:tt)* ) )? ;
631 let lhs = $lhs.load_value($fx);
632 let rhs = $rhs.load_value($fx);
633 match ($bin_op, $signed) {
635 (BinOp::$var, $sign) => binop_match!(@single $fx, $bug_fmt, $var, $signed, lhs, rhs, $ret_ty, $name $( ( $($next)* ) )?),
641 fn trans_bool_binop<'a, 'tcx: 'a>(
642 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
648 let res = binop_match! {
649 fx, bin_op, false, lhs, rhs, ty, "bool";
662 Lt (_) icmp(UnsignedLessThan);
663 Le (_) icmp(UnsignedLessThanOrEqual);
664 Ne (_) icmp(NotEqual);
665 Ge (_) icmp(UnsignedGreaterThanOrEqual);
666 Gt (_) icmp(UnsignedGreaterThan);
674 pub fn trans_int_binop<'a, 'tcx: 'a>(
675 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
682 if bin_op != BinOp::Shl && bin_op != BinOp::Shr {
686 "int binop requires lhs and rhs of same type"
690 fx, bin_op, signed, lhs, rhs, out_ty, "int/uint";
706 Lt (false) icmp(UnsignedLessThan);
707 Lt (true) icmp(SignedLessThan);
708 Le (false) icmp(UnsignedLessThanOrEqual);
709 Le (true) icmp(SignedLessThanOrEqual);
710 Ne (_) icmp(NotEqual);
711 Ge (false) icmp(UnsignedGreaterThanOrEqual);
712 Ge (true) icmp(SignedGreaterThanOrEqual);
713 Gt (false) icmp(UnsignedGreaterThan);
714 Gt (true) icmp(SignedGreaterThan);
720 pub fn trans_checked_int_binop<'a, 'tcx: 'a>(
721 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
728 if bin_op != BinOp::Shl && bin_op != BinOp::Shr {
732 "checked int binop requires lhs and rhs of same type"
735 let res_ty = match out_ty.sty {
736 TypeVariants::TyTuple(tys) => tys[0],
738 "Checked int binop requires tuple as output, but got {:?}",
743 let res = binop_match! {
744 fx, bin_op, signed, lhs, rhs, res_ty, "checked int/uint";
767 // TODO: check for overflow
768 let has_overflow = CValue::const_val(fx, fx.tcx.types.bool, 0);
770 let out_place = CPlace::temp(fx, out_ty);
772 .place_field(fx, mir::Field::new(0))
773 .write_cvalue(fx, res);
776 .place_field(fx, mir::Field::new(1))
777 .write_cvalue(fx, has_overflow);
779 out_place.to_cvalue(fx)
782 fn trans_float_binop<'a, 'tcx: 'a>(
783 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
789 let res = binop_match! {
790 fx, bin_op, false, lhs, rhs, ty, "float";
796 assert_eq!(lhs.layout().ty, ty);
797 assert_eq!(rhs.layout().ty, ty);
799 TypeVariants::TyFloat(FloatTy::F32) => fx.easy_call("fmodf", &[lhs, rhs], ty),
800 TypeVariants::TyFloat(FloatTy::F64) => fx.easy_call("fmod", &[lhs, rhs], ty),
811 Lt (_) fcmp(LessThan);
812 Le (_) fcmp(LessThanOrEqual);
813 Ne (_) fcmp(NotEqual);
814 Ge (_) fcmp(GreaterThanOrEqual);
815 Gt (_) fcmp(GreaterThan);
823 fn trans_char_binop<'a, 'tcx: 'a>(
824 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
830 let res = binop_match! {
831 fx, bin_op, false, lhs, rhs, ty, "char";
844 Lt (_) icmp(UnsignedLessThan);
845 Le (_) icmp(UnsignedLessThanOrEqual);
846 Ne (_) icmp(NotEqual);
847 Ge (_) icmp(UnsignedGreaterThanOrEqual);
848 Gt (_) icmp(UnsignedGreaterThan);
856 fn trans_ptr_binop<'a, 'tcx: 'a>(
857 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
863 match lhs.layout().ty.sty {
864 TypeVariants::TyRawPtr(TypeAndMut { ty, mutbl: _ }) => {
865 if !ty.is_sized(fx.tcx.at(DUMMY_SP), ParamEnv::reveal_all()) {
866 unimpl!("Unsized values are not yet implemented");
869 _ => bug!("trans_ptr_binop on non ptr"),
872 fx, bin_op, false, lhs, rhs, ty, "ptr";
885 Lt (_) icmp(UnsignedLessThan);
886 Le (_) icmp(UnsignedLessThanOrEqual);
887 Ne (_) icmp(NotEqual);
888 Ge (_) icmp(UnsignedGreaterThanOrEqual);
889 Gt (_) icmp(UnsignedGreaterThan);
895 pub fn trans_place<'a, 'tcx: 'a>(
896 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
900 Place::Local(local) => fx.get_local_place(*local),
901 Place::Promoted(promoted) => crate::constant::trans_promoted(fx, promoted.0),
902 Place::Static(static_) => crate::constant::codegen_static_ref(fx, static_),
903 Place::Projection(projection) => {
904 let base = trans_place(fx, &projection.base);
905 match projection.elem {
906 ProjectionElem::Deref => {
907 let layout = fx.layout_of(place.ty(&*fx.mir, fx.tcx).to_ty(fx.tcx));
908 if layout.is_unsized() {
909 unimpl!("Unsized places are not yet implemented");
911 CPlace::Addr(base.to_cvalue(fx).load_value(fx), layout)
913 ProjectionElem::Field(field, _ty) => base.place_field(fx, field),
914 ProjectionElem::Index(local) => {
915 let index = fx.get_local_place(local).to_cvalue(fx).load_value(fx);
916 base.place_index(fx, index)
918 ProjectionElem::ConstantIndex {
923 "projection const index {:?} offset {:?} not from end",
927 ProjectionElem::ConstantIndex {
932 "projection const index {:?} offset {:?} from end",
936 ProjectionElem::Subslice { from, to } => unimplemented!(
937 "projection subslice {:?} from {} to {}",
942 ProjectionElem::Downcast(_adt_def, variant) => base.downcast_variant(fx, variant),
948 pub fn trans_operand<'a, 'tcx>(
949 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
950 operand: &Operand<'tcx>,
953 Operand::Move(place) | Operand::Copy(place) => {
954 let cplace = trans_place(fx, place);
957 Operand::Constant(const_) => crate::constant::trans_constant(fx, const_),