bjoernager/rust
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Implement the instruction_set attribute

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This commit is contained in:
xd009642 2020-10-08 23:23:27 +01:00
parent 4437b4b150
commit a6e2b636e6
22 changed files with 247 additions and 4 deletions
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73
compiler/rustc_typeck/src/collect.rs
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@ -21,8 +21,8 @@ use crate::constrained_generic_params as cgp;
use crate::errors;
use crate::middle::resolve_lifetime as rl;
use rustc_ast as ast;
use rustc_ast::MetaItemKind;
use rustc_attr::{list_contains_name, InlineAttr, OptimizeAttr};
use rustc_ast::{MetaItemKind, NestedMetaItem};
use rustc_attr::{list_contains_name, InlineAttr, InstructionSetAttr, OptimizeAttr};
use rustc_data_structures::captures::Captures;
use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexSet};
use rustc_errors::{struct_span_err, Applicability};
@ -2647,6 +2647,75 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, id: DefId) -> CodegenFnAttrs {
}
}
}
} else if tcx.sess.check_name(attr, sym::instruction_set) {
codegen_fn_attrs.instruction_set = match attr.meta().map(|i| i.kind) {
Some(MetaItemKind::List(ref items)) => match items.as_slice() {
[NestedMetaItem::MetaItem(set)] => {
let segments =
set.path.segments.iter().map(|x| x.ident.name).collect::<Vec<_>>();
match segments.as_slice() {
[sym::arm, sym::a32] | [sym::arm, sym::t32] => {
if !tcx.sess.target.target.options.has_thumb_interworking {
struct_span_err!(
tcx.sess.diagnostic(),
attr.span,
E0779,
"target does not support `#[instruction_set]`"
)
.emit();
None
} else if segments[1] == sym::a32 {
Some(InstructionSetAttr::ArmA32)
} else if segments[1] == sym::t32 {
Some(InstructionSetAttr::ArmT32)
} else {
unreachable!()
}
}
_ => {
struct_span_err!(
tcx.sess.diagnostic(),
attr.span,
E0779,
"invalid instruction set specified",
)
.emit();
None
}
}
}
[] => {
struct_span_err!(
tcx.sess.diagnostic(),
attr.span,
E0778,
"`#[instruction_set]` requires an argument"
)
.emit();
None
}
_ => {
struct_span_err!(
tcx.sess.diagnostic(),
attr.span,
E0779,
"cannot specify more than one instruction set"
)
.emit();
None
}
},
_ => {
struct_span_err!(
tcx.sess.diagnostic(),
attr.span,
E0778,
"must specify an instruction set"
)
.emit();
None
}
};
}
}