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Set writable and dead_on_unwind attributes for sret arguments

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This commit is contained in:
Nikita Popov 2024-02-19 15:02:49 +01:00
parent aa067fb984
commit 3695af697e
7 changed files with 31 additions and 3 deletions
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13
compiler/rustc_codegen_llvm/src/abi.rs
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@ -2,6 +2,7 @@ use crate::attributes;
use crate::builder::Builder;
use crate::context::CodegenCx;
use crate::llvm::{self, Attribute, AttributePlace};
use crate::llvm_util;
use crate::type_::Type;
use crate::type_of::LayoutLlvmExt;
use crate::value::Value;
@ -420,6 +421,18 @@ impl<'ll, 'tcx> FnAbiLlvmExt<'ll, 'tcx> for FnAbi<'tcx, Ty<'tcx>> {
cx.type_array(cx.type_i8(), self.ret.layout.size.bytes()),
);
attributes::apply_to_llfn(llfn, llvm::AttributePlace::Argument(i), &[sret]);
if cx.sess().opts.optimize != config::OptLevel::No
&& llvm_util::get_version() >= (18, 0, 0)
{
attributes::apply_to_llfn(
llfn,
llvm::AttributePlace::Argument(i),
&[
llvm::AttributeKind::Writable.create_attr(cx.llcx),
llvm::AttributeKind::DeadOnUnwind.create_attr(cx.llcx),
],
);
}
}
PassMode::Cast { cast, pad_i32: _ } => {
cast.attrs.apply_attrs_to_llfn(llvm::AttributePlace::ReturnValue, cx, llfn);