let (_, unsized_align) =
crate::unsize::size_and_align_of_dst(fx, field_layout, extra);
- let one = fx.bcx.ins().iconst(pointer_ty(fx.tcx), 1);
+ let one = fx.bcx.ins().iconst(fx.pointer_type, 1);
let align_sub_1 = fx.bcx.ins().isub(unsized_align, one);
let and_lhs = fx.bcx.ins().iadd_imm(align_sub_1, unaligned_offset as i64);
- let zero = fx.bcx.ins().iconst(pointer_ty(fx.tcx), 0);
+ let zero = fx.bcx.ins().iconst(fx.pointer_type, 0);
let and_rhs = fx.bcx.ins().isub(zero, unsized_align);
let offset = fx.bcx.ins().band(and_lhs, and_rhs);
}
}
-fn scalar_pair_calculate_b_offset(
- tcx: TyCtxt<'_>,
- a_scalar: &Scalar,
- b_scalar: &Scalar,
-) -> Offset32 {
+fn scalar_pair_calculate_b_offset(tcx: TyCtxt<'_>, a_scalar: Scalar, b_scalar: Scalar) -> Offset32 {
let b_offset = a_scalar.value.size(&tcx).align_to(b_scalar.value.align(&tcx).abi);
Offset32::new(b_offset.bytes().try_into().unwrap())
}
match self.0 {
CValueInner::ByRef(ptr, None) => {
let clif_ty = match layout.abi {
- Abi::Scalar(ref scalar) => scalar_to_clif_type(fx.tcx, scalar.clone()),
- Abi::Vector { ref element, count } => {
- scalar_to_clif_type(fx.tcx, element.clone())
- .by(u16::try_from(count).unwrap())
- .unwrap()
- }
+ Abi::Scalar(scalar) => scalar_to_clif_type(fx.tcx, scalar),
+ Abi::Vector { element, count } => scalar_to_clif_type(fx.tcx, element)
+ .by(u16::try_from(count).unwrap())
+ .unwrap(),
_ => unreachable!("{:?}", layout.ty),
};
let mut flags = MemFlags::new();
let layout = self.1;
match self.0 {
CValueInner::ByRef(ptr, None) => {
- let (a_scalar, b_scalar) = match &layout.abi {
+ let (a_scalar, b_scalar) = match layout.abi {
Abi::ScalarPair(a, b) => (a, b),
_ => unreachable!("load_scalar_pair({:?})", self),
};
let b_offset = scalar_pair_calculate_b_offset(fx.tcx, a_scalar, b_scalar);
- let clif_ty1 = scalar_to_clif_type(fx.tcx, a_scalar.clone());
- let clif_ty2 = scalar_to_clif_type(fx.tcx, b_scalar.clone());
+ let clif_ty1 = scalar_to_clif_type(fx.tcx, a_scalar);
+ let clif_ty2 = scalar_to_clif_type(fx.tcx, b_scalar);
let mut flags = MemFlags::new();
flags.set_notrap();
let val1 = ptr.load(fx, clif_ty1, flags);
}
}
+ /// Like [`CValue::value_field`] except handling ADTs containing a single array field in a way
+ /// such that you can access individual lanes.
+ pub(crate) fn value_lane(
+ self,
+ fx: &mut FunctionCx<'_, '_, 'tcx>,
+ lane_idx: u64,
+ ) -> CValue<'tcx> {
+ let layout = self.1;
+ assert!(layout.ty.is_simd());
+ let (lane_count, lane_ty) = layout.ty.simd_size_and_type(fx.tcx);
+ let lane_layout = fx.layout_of(lane_ty);
+ assert!(lane_idx < lane_count);
+ match self.0 {
+ CValueInner::ByVal(val) => match layout.abi {
+ Abi::Vector { element: _, count: _ } => {
+ assert!(lane_count <= u8::MAX.into(), "SIMD type with more than 255 lanes???");
+ let lane_idx = u8::try_from(lane_idx).unwrap();
+ let lane = fx.bcx.ins().extractlane(val, lane_idx);
+ CValue::by_val(lane, lane_layout)
+ }
+ _ => unreachable!("value_lane for ByVal with abi {:?}", layout.abi),
+ },
+ CValueInner::ByValPair(_, _) => unreachable!(),
+ CValueInner::ByRef(ptr, None) => {
+ let field_offset = lane_layout.size * lane_idx;
+ let field_ptr = ptr.offset_i64(fx, i64::try_from(field_offset.bytes()).unwrap());
+ CValue::by_ref(field_ptr, lane_layout)
+ }
+ CValueInner::ByRef(_, Some(_)) => unreachable!(),
+ }
+ }
+
pub(crate) fn unsize_value(self, fx: &mut FunctionCx<'_, '_, 'tcx>, dest: CPlace<'tcx>) {
crate::unsize::coerce_unsized_into(fx, self, dest);
}
&self.inner
}
- pub(crate) fn no_place(layout: TyAndLayout<'tcx>) -> CPlace<'tcx> {
- CPlace { inner: CPlaceInner::Addr(Pointer::dangling(layout.align.pref), None), layout }
- }
-
pub(crate) fn new_stack_slot(
fx: &mut FunctionCx<'_, '_, 'tcx>,
layout: TyAndLayout<'tcx>,
) -> CPlace<'tcx> {
assert!(!layout.is_unsized());
if layout.size.bytes() == 0 {
- return CPlace::no_place(layout);
+ return CPlace {
+ inner: CPlaceInner::Addr(Pointer::dangling(layout.align.pref), None),
+ layout,
+ };
}
let stack_slot = fx.bcx.create_stack_slot(StackSlotData {
// FIXME Don't force the size to a multiple of 16 bytes once Cranelift gets a way to
// specify stack slot alignment.
size: (u32::try_from(layout.size.bytes()).unwrap() + 15) / 16 * 16,
- offset: None,
});
CPlace { inner: CPlaceInner::Addr(Pointer::stack_slot(stack_slot), None), layout }
}
// FIXME Don't force the size to a multiple of 16 bytes once Cranelift gets a way to
// specify stack slot alignment.
size: (src_ty.bytes() + 15) / 16 * 16,
- offset: None,
});
let ptr = Pointer::stack_slot(stack_slot);
ptr.store(fx, data, MemFlags::trusted());
ptr.load(fx, dst_ty, MemFlags::trusted())
}
+
+ // `CValue`s should never contain SSA-only types, so if you ended
+ // up here having seen an error like `B1 -> I8`, then before
+ // calling `write_cvalue` you need to add a `bint` instruction.
_ => unreachable!("write_cvalue_transmute: {:?} -> {:?}", src_ty, dst_ty),
};
//fx.bcx.set_val_label(data, cranelift_codegen::ir::ValueLabel::new(var.index()));
let dst_layout = self.layout();
let to_ptr = match self.inner {
CPlaceInner::Var(_local, var) => {
+ if let ty::Array(element, len) = dst_layout.ty.kind() {
+ // Can only happen for vector types
+ let len =
+ u16::try_from(len.eval_usize(fx.tcx, ParamEnv::reveal_all())).unwrap();
+ let vector_ty = fx.clif_type(element).unwrap().by(len).unwrap();
+
+ let data = match from.0 {
+ CValueInner::ByRef(ptr, None) => {
+ let mut flags = MemFlags::new();
+ flags.set_notrap();
+ ptr.load(fx, vector_ty, flags)
+ }
+ CValueInner::ByVal(_)
+ | CValueInner::ByValPair(_, _)
+ | CValueInner::ByRef(_, Some(_)) => bug!("array should be ByRef"),
+ };
+
+ fx.bcx.def_var(var, data);
+ return;
+ }
let data = CValue(from.0, dst_layout).load_scalar(fx);
let dst_ty = fx.clif_type(self.layout().ty).unwrap();
transmute_value(fx, var, data, dst_ty);
to_ptr.store(fx, val, flags);
return;
}
- Abi::ScalarPair(ref a_scalar, ref b_scalar) => {
+ Abi::ScalarPair(a_scalar, b_scalar) => {
let (value, extra) = from.load_scalar_pair(fx);
let b_offset = scalar_pair_calculate_b_offset(fx.tcx, a_scalar, b_scalar);
to_ptr.store(fx, value, flags);
let src_align = src_layout.align.abi.bytes() as u8;
let dst_align = dst_layout.align.abi.bytes() as u8;
fx.bcx.emit_small_memory_copy(
- fx.module.target_config(),
+ fx.target_config,
to_addr,
from_addr,
size,
let layout = self.layout();
match self.inner {
- CPlaceInner::Var(local, var) => {
- if let Abi::Vector { .. } = layout.abi {
+ CPlaceInner::Var(local, var) => match layout.ty.kind() {
+ ty::Array(_, _) => {
+ // Can only happen for vector types
return CPlace {
inner: CPlaceInner::VarLane(local, var, field.as_u32().try_into().unwrap()),
layout: layout.field(fx, field.as_u32().try_into().unwrap()),
};
}
- }
+ ty::Adt(adt_def, substs) if layout.ty.is_simd() => {
+ let f0_ty = adt_def.non_enum_variant().fields[0].ty(fx.tcx, substs);
+
+ match f0_ty.kind() {
+ ty::Array(_, _) => {
+ assert_eq!(field.as_u32(), 0);
+ return CPlace {
+ inner: CPlaceInner::Var(local, var),
+ layout: layout.field(fx, field.as_u32().try_into().unwrap()),
+ };
+ }
+ _ => {
+ return CPlace {
+ inner: CPlaceInner::VarLane(
+ local,
+ var,
+ field.as_u32().try_into().unwrap(),
+ ),
+ layout: layout.field(fx, field.as_u32().try_into().unwrap()),
+ };
+ }
+ }
+ }
+ _ => {}
+ },
CPlaceInner::VarPair(local, var1, var2) => {
let layout = layout.field(&*fx, field.index());
}
}
+ /// Like [`CPlace::place_field`] except handling ADTs containing a single array field in a way
+ /// such that you can access individual lanes.
+ pub(crate) fn place_lane(
+ self,
+ fx: &mut FunctionCx<'_, '_, 'tcx>,
+ lane_idx: u64,
+ ) -> CPlace<'tcx> {
+ let layout = self.layout();
+ assert!(layout.ty.is_simd());
+ let (lane_count, lane_ty) = layout.ty.simd_size_and_type(fx.tcx);
+ let lane_layout = fx.layout_of(lane_ty);
+ assert!(lane_idx < lane_count);
+
+ match self.inner {
+ CPlaceInner::Var(local, var) => {
+ assert!(matches!(layout.abi, Abi::Vector { .. }));
+ CPlace {
+ inner: CPlaceInner::VarLane(local, var, lane_idx.try_into().unwrap()),
+ layout: lane_layout,
+ }
+ }
+ CPlaceInner::VarPair(_, _, _) => unreachable!(),
+ CPlaceInner::VarLane(_, _, _) => unreachable!(),
+ CPlaceInner::Addr(ptr, None) => {
+ let field_offset = lane_layout.size * lane_idx;
+ let field_ptr = ptr.offset_i64(fx, i64::try_from(field_offset.bytes()).unwrap());
+ CPlace::for_ptr(field_ptr, lane_layout)
+ }
+ CPlaceInner::Addr(_, Some(_)) => unreachable!(),
+ }
+ }
+
pub(crate) fn place_index(
self,
fx: &mut FunctionCx<'_, '_, 'tcx>,
projects / rust.git / blobdiff