diff options
Diffstat (limited to '')
-rw-r--r-- | compiler/rustc_codegen_cranelift/src/value_and_place.rs | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_cranelift/src/value_and_place.rs b/compiler/rustc_codegen_cranelift/src/value_and_place.rs index cfaadca94..c3dfbd372 100644 --- a/compiler/rustc_codegen_cranelift/src/value_and_place.rs +++ b/compiler/rustc_codegen_cranelift/src/value_and_place.rs @@ -107,6 +107,50 @@ impl<'tcx> CValue<'tcx> { } } + // FIXME remove + // Forces the data value of a dyn* value to the stack and returns a pointer to it as well as the + // vtable pointer. + pub(crate) fn dyn_star_force_data_on_stack( + self, + fx: &mut FunctionCx<'_, '_, 'tcx>, + ) -> (Value, Value) { + assert!(self.1.ty.is_dyn_star()); + + match self.0 { + CValueInner::ByRef(ptr, None) => { + let (a_scalar, b_scalar) = match self.1.abi { + Abi::ScalarPair(a, b) => (a, b), + _ => unreachable!("dyn_star_force_data_on_stack({:?})", self), + }; + let b_offset = scalar_pair_calculate_b_offset(fx.tcx, a_scalar, b_scalar); + let clif_ty2 = scalar_to_clif_type(fx.tcx, b_scalar); + let mut flags = MemFlags::new(); + flags.set_notrap(); + let vtable = ptr.offset(fx, b_offset).load(fx, clif_ty2, flags); + (ptr.get_addr(fx), vtable) + } + CValueInner::ByValPair(data, vtable) => { + let stack_slot = fx.bcx.create_sized_stack_slot(StackSlotData { + kind: StackSlotKind::ExplicitSlot, + // 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(fx.target_config.pointer_type().bytes()).unwrap() + 15) + / 16 + * 16, + }); + let data_ptr = Pointer::stack_slot(stack_slot); + let mut flags = MemFlags::new(); + flags.set_notrap(); + data_ptr.store(fx, data, flags); + + (data_ptr.get_addr(fx), vtable) + } + CValueInner::ByRef(_, Some(_)) | CValueInner::ByVal(_) => { + unreachable!("dyn_star_force_data_on_stack({:?})", self) + } + } + } + pub(crate) fn try_to_ptr(self) -> Option<(Pointer, Option<Value>)> { match self.0 { CValueInner::ByRef(ptr, meta) => Some((ptr, meta)), @@ -236,6 +280,10 @@ impl<'tcx> CValue<'tcx> { crate::unsize::coerce_unsized_into(fx, self, dest); } + pub(crate) fn coerce_dyn_star(self, fx: &mut FunctionCx<'_, '_, 'tcx>, dest: CPlace<'tcx>) { + crate::unsize::coerce_dyn_star(fx, self, dest); + } + /// If `ty` is signed, `const_val` must already be sign extended. pub(crate) fn const_val( fx: &mut FunctionCx<'_, '_, 'tcx>, @@ -621,6 +669,14 @@ impl<'tcx> CPlace<'tcx> { } } + pub(crate) fn place_opaque_cast( + self, + fx: &mut FunctionCx<'_, '_, 'tcx>, + ty: Ty<'tcx>, + ) -> CPlace<'tcx> { + CPlace { inner: self.inner, layout: fx.layout_of(ty) } + } + pub(crate) fn place_field( self, fx: &mut FunctionCx<'_, '_, 'tcx>, |