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Emit the right types for vtable pointers when dropping dyn*

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This commit is contained in:
Michael Goulet 2023-02-15 05:11:27 +00:00
parent e82cc656c8
commit 7f798c2b21
1 changed files with 78 additions and 80 deletions
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12
compiler/rustc_codegen_ssa/src/mir/block.rs
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@ -452,7 +452,8 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
args1 = [place.llval];
&args1[..]
};
let (drop_fn, fn_abi) = match ty.kind() {
let (drop_fn, fn_abi) =
match ty.kind() {
// FIXME(eddyb) perhaps move some of this logic into
// `Instance::resolve_drop_in_place`?
ty::Dynamic(_, _, ty::Dyn) => {
@ -516,17 +517,14 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
debug!("drop_fn = {:?}", drop_fn);
debug!("args = {:?}", args);
let fn_abi = bx.fn_abi_of_instance(virtual_drop, ty::List::empty());
let data = args[0];
let data_ty = bx.cx().backend_type(place.layout);
let vtable_ptr =
bx.gep(data_ty, data, &[bx.cx().const_i32(0), bx.cx().const_i32(1)]);
let vtable = bx.load(bx.type_i8p(), vtable_ptr, abi::Align::ONE);
let meta_ptr = place.project_field(bx, 1);
let meta = bx.load_operand(meta_ptr);
// Truncate vtable off of args list
args = &args[..1];
debug!("args' = {:?}", args);
(
meth::VirtualIndex::from_index(ty::COMMON_VTABLE_ENTRIES_DROPINPLACE)
.get_fn(bx, vtable, ty, &fn_abi),
.get_fn(bx, meta.immediate(), ty, &fn_abi),
fn_abi,
)
}