.as_ref()
.map(|&(ref place, bb)| (trans_place(fx, place), bb));
- if !codegen_intrinsic_call(fx, fn_ty, &args, destination) {
- codegen_call_inner(
- fx,
- Some(func),
- fn_ty,
- args,
- destination.map(|(place, _)| place),
- );
-
- if let Some((_, dest)) = destination {
- let ret_ebb = fx.get_ebb(dest);
- fx.bcx.ins().jump(ret_ebb, &[]);
- } else {
- fx.bcx.ins().trap(TrapCode::User(!0));
+ if let ty::FnDef(def_id, substs) = fn_ty.sty {
+ let sig = ty_fn_sig(fx.tcx, fn_ty);
+
+ if sig.abi == Abi::RustIntrinsic {
+ crate::intrinsics::codegen_intrinsic_call(fx, def_id, substs, &args, destination);
+ return;
}
}
+
+ codegen_call_inner(
+ fx,
+ Some(func),
+ fn_ty,
+ args,
+ destination.map(|(place, _)| place),
+ );
+
+ if let Some((_, dest)) = destination {
+ let ret_ebb = fx.get_ebb(dest);
+ fx.bcx.ins().jump(ret_ebb, &[]);
+ } else {
+ fx.bcx.ins().trap(TrapCode::User(!0));
+ }
}
pub fn codegen_call_inner<'a, 'tcx: 'a>(
}
}
}
-
-fn codegen_intrinsic_call<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
- fn_ty: Ty<'tcx>,
- args: &[CValue<'tcx>],
- destination: Option<(CPlace<'tcx>, BasicBlock)>,
-) -> bool {
- if let ty::FnDef(def_id, substs) = fn_ty.sty {
- let sig = ty_fn_sig(fx.tcx, fn_ty);
-
- if sig.abi == Abi::RustIntrinsic {
- let intrinsic = fx.tcx.item_name(def_id).as_str();
- let intrinsic = &intrinsic[..];
-
- let ret = match destination {
- Some((place, _)) => place,
- None => {
- // Insert non returning intrinsics here
- match intrinsic {
- "abort" => {
- fx.bcx.ins().trap(TrapCode::User(!0 - 1));
- }
- "unreachable" => {
- fx.bcx.ins().trap(TrapCode::User(!0 - 1));
- }
- _ => unimplemented!("unsupported instrinsic {}", intrinsic),
- }
- return true;
- }
- };
-
- let nil_ty = fx.tcx.mk_unit();
- let u64_layout = fx.layout_of(fx.tcx.types.u64);
- let usize_layout = fx.layout_of(fx.tcx.types.usize);
-
- match intrinsic {
- "assume" => {
- assert_eq!(args.len(), 1);
- }
- "arith_offset" => {
- assert_eq!(args.len(), 2);
- let base = args[0].load_value(fx);
- let offset = args[1].load_value(fx);
- let res = fx.bcx.ins().iadd(base, offset);
- let res = CValue::ByVal(res, ret.layout());
- ret.write_cvalue(fx, res);
- }
- "likely" | "unlikely" => {
- assert_eq!(args.len(), 1);
- ret.write_cvalue(fx, args[0]);
- }
- "copy" | "copy_nonoverlapping" => {
- let elem_ty = substs.type_at(0);
- let elem_size: u64 = fx.layout_of(elem_ty).size.bytes();
- let elem_size = fx
- .bcx
- .ins()
- .iconst(fx.module.pointer_type(), elem_size as i64);
- assert_eq!(args.len(), 3);
- let src = args[0].load_value(fx);
- let dst = args[1].load_value(fx);
- let count = args[2].load_value(fx);
- let byte_amount = fx.bcx.ins().imul(count, elem_size);
-
- if intrinsic.ends_with("_nonoverlapping") {
- fx.bcx.call_memcpy(fx.isa, dst, src, byte_amount);
- } else {
- fx.bcx.call_memmove(fx.isa, dst, src, byte_amount);
- }
- }
- "discriminant_value" => {
- assert_eq!(args.len(), 1);
- let discr = crate::base::trans_get_discriminant(fx, args[0], ret.layout());
- ret.write_cvalue(fx, discr);
- }
- "size_of" => {
- assert_eq!(args.len(), 0);
- let size_of = fx.layout_of(substs.type_at(0)).size.bytes();
- let size_of = CValue::const_val(fx, usize_layout.ty, size_of as i64);
- ret.write_cvalue(fx, size_of);
- }
- "size_of_val" => {
- assert_eq!(args.len(), 1);
- let layout = fx.layout_of(substs.type_at(0));
- let size = match &layout.ty.sty {
- _ if !layout.is_unsized() => fx
- .bcx
- .ins()
- .iconst(fx.module.pointer_type(), layout.size.bytes() as i64),
- ty::Slice(elem) => {
- let len = args[0].load_value_pair(fx).1;
- let elem_size = fx.layout_of(elem).size.bytes();
- fx.bcx.ins().imul_imm(len, elem_size as i64)
- }
- ty::Dynamic(..) => crate::vtable::size_of_obj(fx, args[0]),
- ty => bug!("size_of_val for unknown unsized type {:?}", ty),
- };
- ret.write_cvalue(fx, CValue::ByVal(size, usize_layout));
- }
- "min_align_of" => {
- assert_eq!(args.len(), 0);
- let min_align = fx.layout_of(substs.type_at(0)).align.abi();
- let min_align = CValue::const_val(fx, usize_layout.ty, min_align as i64);
- ret.write_cvalue(fx, min_align);
- }
- "min_align_of_val" => {
- assert_eq!(args.len(), 1);
- let layout = fx.layout_of(substs.type_at(0));
- let align = match &layout.ty.sty {
- _ if !layout.is_unsized() => fx
- .bcx
- .ins()
- .iconst(fx.module.pointer_type(), layout.align.abi() as i64),
- ty::Slice(elem) => {
- let align = fx.layout_of(elem).align.abi() as i64;
- fx.bcx.ins().iconst(fx.module.pointer_type(), align)
- }
- ty::Dynamic(..) => crate::vtable::min_align_of_obj(fx, args[0]),
- ty => unimplemented!("min_align_of_val for {:?}", ty),
- };
- ret.write_cvalue(fx, CValue::ByVal(align, usize_layout));
- }
- "type_id" => {
- assert_eq!(args.len(), 0);
- let type_id = fx.tcx.type_id_hash(substs.type_at(0));
- let type_id = CValue::const_val(fx, u64_layout.ty, type_id as i64);
- ret.write_cvalue(fx, type_id);
- }
- _ if intrinsic.starts_with("unchecked_") => {
- assert_eq!(args.len(), 2);
- let bin_op = match intrinsic {
- "unchecked_div" => BinOp::Div,
- "unchecked_rem" => BinOp::Rem,
- "unchecked_shl" => BinOp::Shl,
- "unchecked_shr" => BinOp::Shr,
- _ => unimplemented!("intrinsic {}", intrinsic),
- };
- let res = match ret.layout().ty.sty {
- ty::Uint(_) => crate::base::trans_int_binop(
- fx,
- bin_op,
- args[0],
- args[1],
- ret.layout().ty,
- false,
- ),
- ty::Int(_) => crate::base::trans_int_binop(
- fx,
- bin_op,
- args[0],
- args[1],
- ret.layout().ty,
- true,
- ),
- _ => panic!(),
- };
- ret.write_cvalue(fx, res);
- }
- _ if intrinsic.ends_with("_with_overflow") => {
- assert_eq!(args.len(), 2);
- assert_eq!(args[0].layout().ty, args[1].layout().ty);
- let bin_op = match intrinsic {
- "add_with_overflow" => BinOp::Add,
- "sub_with_overflow" => BinOp::Sub,
- "mul_with_overflow" => BinOp::Mul,
- _ => unimplemented!("intrinsic {}", intrinsic),
- };
- let res = match args[0].layout().ty.sty {
- ty::Uint(_) => crate::base::trans_checked_int_binop(
- fx,
- bin_op,
- args[0],
- args[1],
- ret.layout().ty,
- false,
- ),
- ty::Int(_) => crate::base::trans_checked_int_binop(
- fx,
- bin_op,
- args[0],
- args[1],
- ret.layout().ty,
- true,
- ),
- _ => panic!(),
- };
- ret.write_cvalue(fx, res);
- }
- _ if intrinsic.starts_with("overflowing_") => {
- assert_eq!(args.len(), 2);
- assert_eq!(args[0].layout().ty, args[1].layout().ty);
- let bin_op = match intrinsic {
- "overflowing_add" => BinOp::Add,
- "overflowing_sub" => BinOp::Sub,
- "overflowing_mul" => BinOp::Mul,
- _ => unimplemented!("intrinsic {}", intrinsic),
- };
- let res = match args[0].layout().ty.sty {
- ty::Uint(_) => crate::base::trans_int_binop(
- fx,
- bin_op,
- args[0],
- args[1],
- ret.layout().ty,
- false,
- ),
- ty::Int(_) => crate::base::trans_int_binop(
- fx,
- bin_op,
- args[0],
- args[1],
- ret.layout().ty,
- true,
- ),
- _ => panic!(),
- };
- ret.write_cvalue(fx, res);
- }
- "offset" => {
- assert_eq!(args.len(), 2);
- let base = args[0].load_value(fx);
- let offset = args[1].load_value(fx);
- let res = fx.bcx.ins().iadd(base, offset);
- ret.write_cvalue(fx, CValue::ByVal(res, args[0].layout()));
- }
- "transmute" => {
- assert_eq!(args.len(), 1);
- let src_ty = substs.type_at(0);
- let dst_ty = substs.type_at(1);
- assert_eq!(args[0].layout().ty, src_ty);
- let addr = args[0].force_stack(fx);
- let dst_layout = fx.layout_of(dst_ty);
- ret.write_cvalue(fx, CValue::ByRef(addr, dst_layout))
- }
- "init" => {
- assert_eq!(args.len(), 0);
- let ty = substs.type_at(0);
- let layout = fx.layout_of(ty);
- let stack_slot = fx.bcx.create_stack_slot(StackSlotData {
- kind: StackSlotKind::ExplicitSlot,
- size: layout.size.bytes() as u32,
- offset: None,
- });
- let addr = fx.bcx.ins().stack_addr(pointer_ty(fx.tcx), stack_slot, 0);
- let zero_val = fx.bcx.ins().iconst(types::I8, 0);
- let len_val = fx.bcx.ins().iconst(pointer_ty(fx.tcx), layout.size.bytes() as i64);
- fx.bcx.call_memset(fx.isa, addr, zero_val, len_val);
-
- let uninit_place = CPlace::from_stack_slot(fx, stack_slot, ty);
- let uninit_val = uninit_place.to_cvalue(fx);
- ret.write_cvalue(fx, uninit_val);
- }
- "uninit" => {
- assert_eq!(args.len(), 0);
- let ty = substs.type_at(0);
- let layout = fx.layout_of(ty);
- let stack_slot = fx.bcx.create_stack_slot(StackSlotData {
- kind: StackSlotKind::ExplicitSlot,
- size: layout.size.bytes() as u32,
- offset: None,
- });
-
- let uninit_place = CPlace::from_stack_slot(fx, stack_slot, ty);
- let uninit_val = uninit_place.to_cvalue(fx);
- ret.write_cvalue(fx, uninit_val);
- }
- "ctlz" | "ctlz_nonzero" => {
- assert_eq!(args.len(), 1);
- let arg = args[0].load_value(fx);
- let res = CValue::ByVal(fx.bcx.ins().clz(arg), args[0].layout());
- ret.write_cvalue(fx, res);
- }
- "cttz" | "cttz_nonzero" => {
- assert_eq!(args.len(), 1);
- let arg = args[0].load_value(fx);
- let res = CValue::ByVal(fx.bcx.ins().clz(arg), args[0].layout());
- ret.write_cvalue(fx, res);
- }
- "ctpop" => {
- assert_eq!(args.len(), 1);
- let arg = args[0].load_value(fx);
- let res = CValue::ByVal(fx.bcx.ins().popcnt(arg), args[0].layout());
- ret.write_cvalue(fx, res);
- }
- "bitreverse" => {
- assert_eq!(args.len(), 1);
- let arg = args[0].load_value(fx);
- let res = CValue::ByVal(fx.bcx.ins().bitrev(arg), args[0].layout());
- ret.write_cvalue(fx, res);
- }
- "needs_drop" => {
- assert_eq!(args.len(), 0);
- let ty = substs.type_at(0);
- let needs_drop = if ty.needs_drop(fx.tcx, ParamEnv::reveal_all()) {
- 1
- } else {
- 0
- };
- let needs_drop = CValue::const_val(fx, fx.tcx.types.bool, needs_drop);
- ret.write_cvalue(fx, needs_drop);
- }
- _ if intrinsic.starts_with("atomic_fence") => {}
- _ if intrinsic.starts_with("atomic_singlethreadfence") => {}
- _ if intrinsic.starts_with("atomic_load") => {
- assert_eq!(args.len(), 1);
- let inner_layout =
- fx.layout_of(args[0].layout().ty.builtin_deref(true).unwrap().ty);
- let val = CValue::ByRef(args[0].load_value(fx), inner_layout);
- ret.write_cvalue(fx, val);
- }
- _ if intrinsic.starts_with("atomic_store") => {
- assert_eq!(args.len(), 2);
- let dest = CPlace::Addr(args[0].load_value(fx), None, args[1].layout());
- dest.write_cvalue(fx, args[1]);
- }
- _ if intrinsic.starts_with("atomic_xadd") => {
- assert_eq!(args.len(), 2);
- let clif_ty = fx.cton_type(substs.type_at(0)).unwrap();
- let ptr = args[0].load_value(fx);
- let amount = args[1].load_value(fx);
- let old = fx.bcx.ins().load(clif_ty, MemFlags::new(), ptr, 0);
- let new = fx.bcx.ins().iadd(old, amount);
- fx.bcx.ins().store(MemFlags::new(), new, ptr, 0);
- ret.write_cvalue(fx, CValue::ByVal(old, fx.layout_of(substs.type_at(0))));
- }
- _ if intrinsic.starts_with("atomic_xsub") => {
- assert_eq!(args.len(), 2);
- let clif_ty = fx.cton_type(substs.type_at(0)).unwrap();
- let ptr = args[0].load_value(fx);
- let amount = args[1].load_value(fx);
- let old = fx.bcx.ins().load(clif_ty, MemFlags::new(), ptr, 0);
- let new = fx.bcx.ins().isub(old, amount);
- fx.bcx.ins().store(MemFlags::new(), new, ptr, 0);
- ret.write_cvalue(fx, CValue::ByVal(old, fx.layout_of(substs.type_at(0))));
- }
- _ => unimpl!("unsupported intrinsic {}", intrinsic),
- }
-
- if let Some((_, dest)) = destination {
- let ret_ebb = fx.get_ebb(dest);
- fx.bcx.ins().jump(ret_ebb, &[]);
- } else {
- fx.bcx.ins().trap(TrapCode::User(!0));
- }
- return true;
- }
- }
-
- false
-}
--- /dev/null
+
+use crate::prelude::*;
+
+pub fn codegen_intrinsic_call<'a, 'tcx: 'a>(
+ fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
+ def_id: DefId,
+ substs: &'tcx Substs,
+ args: &[CValue<'tcx>],
+ destination: Option<(CPlace<'tcx>, BasicBlock)>,
+) {
+ let intrinsic = fx.tcx.item_name(def_id).as_str();
+ let intrinsic = &intrinsic[..];
+
+ let ret = match destination {
+ Some((place, _)) => place,
+ None => {
+ // Insert non returning intrinsics here
+ match intrinsic {
+ "abort" => {
+ fx.bcx.ins().trap(TrapCode::User(!0 - 1));
+ }
+ "unreachable" => {
+ fx.bcx.ins().trap(TrapCode::User(!0 - 1));
+ }
+ _ => unimplemented!("unsupported instrinsic {}", intrinsic),
+ }
+ return;
+ }
+ };
+
+ let u64_layout = fx.layout_of(fx.tcx.types.u64);
+ let usize_layout = fx.layout_of(fx.tcx.types.usize);
+
+ match intrinsic {
+ "assume" => {
+ assert_eq!(args.len(), 1);
+ }
+ "arith_offset" => {
+ assert_eq!(args.len(), 2);
+ let base = args[0].load_value(fx);
+ let offset = args[1].load_value(fx);
+ let res = fx.bcx.ins().iadd(base, offset);
+ let res = CValue::ByVal(res, ret.layout());
+ ret.write_cvalue(fx, res);
+ }
+ "likely" | "unlikely" => {
+ assert_eq!(args.len(), 1);
+ ret.write_cvalue(fx, args[0]);
+ }
+ "copy" | "copy_nonoverlapping" => {
+ let elem_ty = substs.type_at(0);
+ let elem_size: u64 = fx.layout_of(elem_ty).size.bytes();
+ let elem_size = fx
+ .bcx
+ .ins()
+ .iconst(fx.module.pointer_type(), elem_size as i64);
+ assert_eq!(args.len(), 3);
+ let src = args[0].load_value(fx);
+ let dst = args[1].load_value(fx);
+ let count = args[2].load_value(fx);
+ let byte_amount = fx.bcx.ins().imul(count, elem_size);
+
+ if intrinsic.ends_with("_nonoverlapping") {
+ fx.bcx.call_memcpy(fx.isa, dst, src, byte_amount);
+ } else {
+ fx.bcx.call_memmove(fx.isa, dst, src, byte_amount);
+ }
+ }
+ "discriminant_value" => {
+ assert_eq!(args.len(), 1);
+ let discr = crate::base::trans_get_discriminant(fx, args[0], ret.layout());
+ ret.write_cvalue(fx, discr);
+ }
+ "size_of" => {
+ assert_eq!(args.len(), 0);
+ let size_of = fx.layout_of(substs.type_at(0)).size.bytes();
+ let size_of = CValue::const_val(fx, usize_layout.ty, size_of as i64);
+ ret.write_cvalue(fx, size_of);
+ }
+ "size_of_val" => {
+ assert_eq!(args.len(), 1);
+ let layout = fx.layout_of(substs.type_at(0));
+ let size = match &layout.ty.sty {
+ _ if !layout.is_unsized() => fx
+ .bcx
+ .ins()
+ .iconst(fx.module.pointer_type(), layout.size.bytes() as i64),
+ ty::Slice(elem) => {
+ let len = args[0].load_value_pair(fx).1;
+ let elem_size = fx.layout_of(elem).size.bytes();
+ fx.bcx.ins().imul_imm(len, elem_size as i64)
+ }
+ ty::Dynamic(..) => crate::vtable::size_of_obj(fx, args[0]),
+ ty => bug!("size_of_val for unknown unsized type {:?}", ty),
+ };
+ ret.write_cvalue(fx, CValue::ByVal(size, usize_layout));
+ }
+ "min_align_of" => {
+ assert_eq!(args.len(), 0);
+ let min_align = fx.layout_of(substs.type_at(0)).align.abi();
+ let min_align = CValue::const_val(fx, usize_layout.ty, min_align as i64);
+ ret.write_cvalue(fx, min_align);
+ }
+ "min_align_of_val" => {
+ assert_eq!(args.len(), 1);
+ let layout = fx.layout_of(substs.type_at(0));
+ let align = match &layout.ty.sty {
+ _ if !layout.is_unsized() => fx
+ .bcx
+ .ins()
+ .iconst(fx.module.pointer_type(), layout.align.abi() as i64),
+ ty::Slice(elem) => {
+ let align = fx.layout_of(elem).align.abi() as i64;
+ fx.bcx.ins().iconst(fx.module.pointer_type(), align)
+ }
+ ty::Dynamic(..) => crate::vtable::min_align_of_obj(fx, args[0]),
+ ty => unimplemented!("min_align_of_val for {:?}", ty),
+ };
+ ret.write_cvalue(fx, CValue::ByVal(align, usize_layout));
+ }
+ "type_id" => {
+ assert_eq!(args.len(), 0);
+ let type_id = fx.tcx.type_id_hash(substs.type_at(0));
+ let type_id = CValue::const_val(fx, u64_layout.ty, type_id as i64);
+ ret.write_cvalue(fx, type_id);
+ }
+ _ if intrinsic.starts_with("unchecked_") => {
+ assert_eq!(args.len(), 2);
+ let bin_op = match intrinsic {
+ "unchecked_div" => BinOp::Div,
+ "unchecked_rem" => BinOp::Rem,
+ "unchecked_shl" => BinOp::Shl,
+ "unchecked_shr" => BinOp::Shr,
+ _ => unimplemented!("intrinsic {}", intrinsic),
+ };
+ let res = match ret.layout().ty.sty {
+ ty::Uint(_) => crate::base::trans_int_binop(
+ fx,
+ bin_op,
+ args[0],
+ args[1],
+ ret.layout().ty,
+ false,
+ ),
+ ty::Int(_) => crate::base::trans_int_binop(
+ fx,
+ bin_op,
+ args[0],
+ args[1],
+ ret.layout().ty,
+ true,
+ ),
+ _ => panic!(),
+ };
+ ret.write_cvalue(fx, res);
+ }
+ _ if intrinsic.ends_with("_with_overflow") => {
+ assert_eq!(args.len(), 2);
+ assert_eq!(args[0].layout().ty, args[1].layout().ty);
+ let bin_op = match intrinsic {
+ "add_with_overflow" => BinOp::Add,
+ "sub_with_overflow" => BinOp::Sub,
+ "mul_with_overflow" => BinOp::Mul,
+ _ => unimplemented!("intrinsic {}", intrinsic),
+ };
+ let res = match args[0].layout().ty.sty {
+ ty::Uint(_) => crate::base::trans_checked_int_binop(
+ fx,
+ bin_op,
+ args[0],
+ args[1],
+ ret.layout().ty,
+ false,
+ ),
+ ty::Int(_) => crate::base::trans_checked_int_binop(
+ fx,
+ bin_op,
+ args[0],
+ args[1],
+ ret.layout().ty,
+ true,
+ ),
+ _ => panic!(),
+ };
+ ret.write_cvalue(fx, res);
+ }
+ _ if intrinsic.starts_with("overflowing_") => {
+ assert_eq!(args.len(), 2);
+ assert_eq!(args[0].layout().ty, args[1].layout().ty);
+ let bin_op = match intrinsic {
+ "overflowing_add" => BinOp::Add,
+ "overflowing_sub" => BinOp::Sub,
+ "overflowing_mul" => BinOp::Mul,
+ _ => unimplemented!("intrinsic {}", intrinsic),
+ };
+ let res = match args[0].layout().ty.sty {
+ ty::Uint(_) => crate::base::trans_int_binop(
+ fx,
+ bin_op,
+ args[0],
+ args[1],
+ ret.layout().ty,
+ false,
+ ),
+ ty::Int(_) => crate::base::trans_int_binop(
+ fx,
+ bin_op,
+ args[0],
+ args[1],
+ ret.layout().ty,
+ true,
+ ),
+ _ => panic!(),
+ };
+ ret.write_cvalue(fx, res);
+ }
+ "offset" => {
+ assert_eq!(args.len(), 2);
+ let base = args[0].load_value(fx);
+ let offset = args[1].load_value(fx);
+ let res = fx.bcx.ins().iadd(base, offset);
+ ret.write_cvalue(fx, CValue::ByVal(res, args[0].layout()));
+ }
+ "transmute" => {
+ assert_eq!(args.len(), 1);
+ let src_ty = substs.type_at(0);
+ let dst_ty = substs.type_at(1);
+ assert_eq!(args[0].layout().ty, src_ty);
+ let addr = args[0].force_stack(fx);
+ let dst_layout = fx.layout_of(dst_ty);
+ ret.write_cvalue(fx, CValue::ByRef(addr, dst_layout))
+ }
+ "init" => {
+ assert_eq!(args.len(), 0);
+ let ty = substs.type_at(0);
+ let layout = fx.layout_of(ty);
+ let stack_slot = fx.bcx.create_stack_slot(StackSlotData {
+ kind: StackSlotKind::ExplicitSlot,
+ size: layout.size.bytes() as u32,
+ offset: None,
+ });
+ let addr = fx.bcx.ins().stack_addr(pointer_ty(fx.tcx), stack_slot, 0);
+ let zero_val = fx.bcx.ins().iconst(types::I8, 0);
+ let len_val = fx.bcx.ins().iconst(pointer_ty(fx.tcx), layout.size.bytes() as i64);
+ fx.bcx.call_memset(fx.isa, addr, zero_val, len_val);
+
+ let uninit_place = CPlace::from_stack_slot(fx, stack_slot, ty);
+ let uninit_val = uninit_place.to_cvalue(fx);
+ ret.write_cvalue(fx, uninit_val);
+ }
+ "uninit" => {
+ assert_eq!(args.len(), 0);
+ let ty = substs.type_at(0);
+ let layout = fx.layout_of(ty);
+ let stack_slot = fx.bcx.create_stack_slot(StackSlotData {
+ kind: StackSlotKind::ExplicitSlot,
+ size: layout.size.bytes() as u32,
+ offset: None,
+ });
+
+ let uninit_place = CPlace::from_stack_slot(fx, stack_slot, ty);
+ let uninit_val = uninit_place.to_cvalue(fx);
+ ret.write_cvalue(fx, uninit_val);
+ }
+ "ctlz" | "ctlz_nonzero" => {
+ assert_eq!(args.len(), 1);
+ let arg = args[0].load_value(fx);
+ let res = CValue::ByVal(fx.bcx.ins().clz(arg), args[0].layout());
+ ret.write_cvalue(fx, res);
+ }
+ "cttz" | "cttz_nonzero" => {
+ assert_eq!(args.len(), 1);
+ let arg = args[0].load_value(fx);
+ let res = CValue::ByVal(fx.bcx.ins().clz(arg), args[0].layout());
+ ret.write_cvalue(fx, res);
+ }
+ "ctpop" => {
+ assert_eq!(args.len(), 1);
+ let arg = args[0].load_value(fx);
+ let res = CValue::ByVal(fx.bcx.ins().popcnt(arg), args[0].layout());
+ ret.write_cvalue(fx, res);
+ }
+ "bitreverse" => {
+ assert_eq!(args.len(), 1);
+ let arg = args[0].load_value(fx);
+ let res = CValue::ByVal(fx.bcx.ins().bitrev(arg), args[0].layout());
+ ret.write_cvalue(fx, res);
+ }
+ "needs_drop" => {
+ assert_eq!(args.len(), 0);
+ let ty = substs.type_at(0);
+ let needs_drop = if ty.needs_drop(fx.tcx, ParamEnv::reveal_all()) {
+ 1
+ } else {
+ 0
+ };
+ let needs_drop = CValue::const_val(fx, fx.tcx.types.bool, needs_drop);
+ ret.write_cvalue(fx, needs_drop);
+ }
+ _ if intrinsic.starts_with("atomic_fence") => {}
+ _ if intrinsic.starts_with("atomic_singlethreadfence") => {}
+ _ if intrinsic.starts_with("atomic_load") => {
+ assert_eq!(args.len(), 1);
+ let inner_layout =
+ fx.layout_of(args[0].layout().ty.builtin_deref(true).unwrap().ty);
+ let val = CValue::ByRef(args[0].load_value(fx), inner_layout);
+ ret.write_cvalue(fx, val);
+ }
+ _ if intrinsic.starts_with("atomic_store") => {
+ assert_eq!(args.len(), 2);
+ let dest = CPlace::Addr(args[0].load_value(fx), None, args[1].layout());
+ dest.write_cvalue(fx, args[1]);
+ }
+ _ if intrinsic.starts_with("atomic_xadd") => {
+ assert_eq!(args.len(), 2);
+ let clif_ty = fx.cton_type(substs.type_at(0)).unwrap();
+ let ptr = args[0].load_value(fx);
+ let amount = args[1].load_value(fx);
+ let old = fx.bcx.ins().load(clif_ty, MemFlags::new(), ptr, 0);
+ let new = fx.bcx.ins().iadd(old, amount);
+ fx.bcx.ins().store(MemFlags::new(), new, ptr, 0);
+ ret.write_cvalue(fx, CValue::ByVal(old, fx.layout_of(substs.type_at(0))));
+ }
+ _ if intrinsic.starts_with("atomic_xsub") => {
+ assert_eq!(args.len(), 2);
+ let clif_ty = fx.cton_type(substs.type_at(0)).unwrap();
+ let ptr = args[0].load_value(fx);
+ let amount = args[1].load_value(fx);
+ let old = fx.bcx.ins().load(clif_ty, MemFlags::new(), ptr, 0);
+ let new = fx.bcx.ins().isub(old, amount);
+ fx.bcx.ins().store(MemFlags::new(), new, ptr, 0);
+ ret.write_cvalue(fx, CValue::ByVal(old, fx.layout_of(substs.type_at(0))));
+ }
+ _ => unimpl!("unsupported intrinsic {}", intrinsic),
+ }
+
+ if let Some((_, dest)) = destination {
+ let ret_ebb = fx.get_ebb(dest);
+ fx.bcx.ins().jump(ret_ebb, &[]);
+ } else {
+ fx.bcx.ins().trap(TrapCode::User(!0));
+ }
+}
projects / rust.git / commitdiff