bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

Remove StructRet arg attr

Browse source 
It is applied exactly when the return value has an indirect pass mode.
Except for InReg on x86 fastcall, arg attrs are now only used for
optimization purposes and thus are fine to ignore.
This commit is contained in:
bjorn3 2020-11-14 19:16:43 +01:00
parent 42b0b8080d
commit 39b8b2b623
3 changed files with 6 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

9
compiler/rustc_codegen_llvm/src/abi.rs
View file

@ -36,7 +36,7 @@ impl ArgAttributeExt for ArgAttribute {
where
F: FnMut(llvm::Attribute),
{
for_each_kind!(self, f, NoAlias, NoCapture, NonNull, ReadOnly, StructRet, InReg)
for_each_kind!(self, f, NoAlias, NoCapture, NonNull, ReadOnly, InReg)
}
}
@ -429,7 +429,8 @@ impl<'tcx> FnAbiLlvmExt<'tcx> for FnAbi<'tcx, Ty<'tcx>> {
}
PassMode::Indirect { ref attrs, extra_attrs: _, on_stack } => {
assert!(!on_stack);
apply(attrs);
let i = apply(attrs);
llvm::Attribute::StructRet.apply_llfn(llvm::AttributePlace::Argument(i), llfn);
}
_ => {}
}
@ -484,7 +485,9 @@ impl<'tcx> FnAbiLlvmExt<'tcx> for FnAbi<'tcx, Ty<'tcx>> {
}
PassMode::Indirect { ref attrs, extra_attrs: _, on_stack } => {
assert!(!on_stack);
apply(attrs);
let i = apply(attrs);
llvm::Attribute::StructRet
.apply_callsite(llvm::AttributePlace::Argument(i), callsite);
}
_ => {}
}