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add -Zmin-function-alignment

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Folkert de Vries 2024-12-18 22:03:07 +01:00
parent a52085d9f6
commit 47573bf61e
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8 changed files with 145 additions and 3 deletions
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6
compiler/rustc_codegen_llvm/src/attributes.rs
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@ -472,7 +472,11 @@ pub(crate) fn llfn_attrs_from_instance<'ll, 'tcx>(
let allocated_pointer = AttributeKind::AllocatedPointer.create_attr(cx.llcx);
attributes::apply_to_llfn(llfn, AttributePlace::Argument(0), &[allocated_pointer]);
}
if let Some(align) = codegen_fn_attrs.alignment {
// function alignment can be set globally with the `-Zmin-function-alignment=<n>` flag;
// the alignment from a `#[repr(align(<n>))]` is used if it specifies a higher alignment.
if let Some(align) =
Ord::max(cx.tcx.sess.opts.unstable_opts.min_function_alignment, codegen_fn_attrs.alignment)
{
llvm::set_alignment(llfn, align);
}
if let Some(backchain) = backchain_attr(cx) {