1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
use std::any::Any;
use std::hash::Hash;
use rustc_ast::expand::allocator::AllocatorKind;
use rustc_data_structures::fx::FxIndexMap;
use rustc_data_structures::sync::{DynSend, DynSync};
use rustc_metadata::EncodedMetadata;
use rustc_metadata::creader::MetadataLoaderDyn;
use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
use rustc_middle::ty::TyCtxt;
use rustc_middle::util::Providers;
use rustc_session::Session;
use rustc_session::config::{self, OutputFilenames, PrintRequest};
use rustc_span::Symbol;
use super::CodegenObject;
use super::write::WriteBackendMethods;
use crate::back::archive::ArArchiveBuilderBuilder;
use crate::back::link::link_binary;
use crate::back::write::TargetMachineFactoryFn;
use crate::{CodegenResults, ModuleCodegen, TargetConfig};
pub trait BackendTypes {
type Value: CodegenObject + PartialEq;
type Metadata: CodegenObject;
type Function: CodegenObject;
type BasicBlock: Copy;
type Type: CodegenObject + PartialEq;
type Funclet;
// FIXME(eddyb) find a common convention for all of the debuginfo-related
// names (choose between `Dbg`, `Debug`, `DebugInfo`, `DI` etc.).
type DIScope: Copy + Hash + PartialEq + Eq;
type DILocation: Copy;
type DIVariable: Copy;
}
pub trait CodegenBackend {
/// Locale resources for diagnostic messages - a string the content of the Fluent resource.
/// Called before `init` so that all other functions are able to emit translatable diagnostics.
fn locale_resource(&self) -> &'static str;
fn init(&self, _sess: &Session) {}
fn print(&self, _req: &PrintRequest, _out: &mut String, _sess: &Session) {}
/// Collect target-specific options that should be set in `cfg(...)`, including
/// `target_feature` and support for unstable float types.
fn target_config(&self, _sess: &Session) -> TargetConfig {
TargetConfig {
target_features: vec![],
unstable_target_features: vec![],
// `true` is used as a default so backends need to acknowledge when they do not
// support the float types, rather than accidentally quietly skipping all tests.
has_reliable_f16: true,
has_reliable_f16_math: true,
has_reliable_f128: true,
has_reliable_f128_math: true,
}
}
fn print_passes(&self) {}
fn print_version(&self) {}
/// The metadata loader used to load rlib and dylib metadata.
///
/// Alternative codegen backends may want to use different rlib or dylib formats than the
/// default native static archives and dynamic libraries.
fn metadata_loader(&self) -> Box<MetadataLoaderDyn> {
Box::new(crate::back::metadata::DefaultMetadataLoader)
}
fn provide(&self, _providers: &mut Providers) {}
fn codegen_crate<'tcx>(&self, tcx: TyCtxt<'tcx>) -> Box<dyn Any>;
/// This is called on the returned `Box<dyn Any>` from [`codegen_crate`](Self::codegen_crate)
///
/// # Panics
///
/// Panics when the passed `Box<dyn Any>` was not returned by [`codegen_crate`](Self::codegen_crate).
fn join_codegen(
&self,
ongoing_codegen: Box<dyn Any>,
sess: &Session,
outputs: &OutputFilenames,
) -> (CodegenResults, FxIndexMap<WorkProductId, WorkProduct>);
/// This is called on the returned [`CodegenResults`] from [`join_codegen`](Self::join_codegen).
fn link(
&self,
sess: &Session,
codegen_results: CodegenResults,
metadata: EncodedMetadata,
outputs: &OutputFilenames,
) {
link_binary(sess, &ArArchiveBuilderBuilder, codegen_results, metadata, outputs);
}
}
pub trait ExtraBackendMethods:
CodegenBackend + WriteBackendMethods + Sized + Send + Sync + DynSend + DynSync
{
fn codegen_allocator<'tcx>(
&self,
tcx: TyCtxt<'tcx>,
module_name: &str,
kind: AllocatorKind,
alloc_error_handler_kind: AllocatorKind,
) -> Self::Module;
/// This generates the codegen unit and returns it along with
/// a `u64` giving an estimate of the unit's processing cost.
fn compile_codegen_unit(
&self,
tcx: TyCtxt<'_>,
cgu_name: Symbol,
) -> (ModuleCodegen<Self::Module>, u64);
fn target_machine_factory(
&self,
sess: &Session,
opt_level: config::OptLevel,
target_features: &[String],
) -> TargetMachineFactoryFn<Self>;
fn spawn_named_thread<F, T>(
_time_trace: bool,
name: String,
f: F,
) -> std::io::Result<std::thread::JoinHandle<T>>
where
F: FnOnce() -> T,
F: Send + 'static,
T: Send + 'static,
{
std::thread::Builder::new().name(name).spawn(f)
}
/// Returns `true` if this backend can be safely called from multiple threads.
///
/// Defaults to `true`.
fn supports_parallel(&self) -> bool {
true
}
}
|
