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Avoid a FnPtr deconstruct-and-recreate.

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This commit is contained in:
Nicholas Nethercote
2024-08-12 15:37:28 +10:00
parent 9e95a2b9a5
commit f4a3ed0243
1 changed files with 5 additions and 4 deletions
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compiler/rustc_middle/src/ty/layout.rs
+5 -4
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@@ -986,10 +986,11 @@ fn ty_and_layout_pointee_info_at(
safe: None,
})
}
ty::FnPtr(sig_tys, hdr) if offset.bytes() == 0 => {
let fn_sig = sig_tys.with(hdr);
tcx.layout_of(param_env.and(Ty::new_fn_ptr(tcx, fn_sig))).ok().map(|layout| {
PointeeInfo { size: layout.size, align: layout.align.abi, safe: None }
ty::FnPtr(..) if offset.bytes() == 0 => {
tcx.layout_of(param_env.and(this.ty)).ok().map(|layout| PointeeInfo {
size: layout.size,
align: layout.align.abi,
safe: None,
})
}
ty::Ref(_, ty, mt) if offset.bytes() == 0 => {