Auto merge of #58847 - bjorn3:remove_metadata_only_cg, r=alexcrichton
Remove metadata only codegen backend It is unused and probably broken at the moment.
This commit is contained in:
commit
0f88167f89
@ -2650,7 +2650,6 @@ dependencies = [
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"log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"rustc 0.0.0",
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"rustc_data_structures 0.0.0",
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"rustc_incremental 0.0.0",
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"rustc_metadata 0.0.0",
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"rustc_mir 0.0.0",
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"rustc_target 0.0.0",
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@ -14,10 +14,6 @@
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# =============================================================================
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[llvm]
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# Indicates whether rustc will support compilation with LLVM
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# note: rustc does not compile without LLVM at the moment
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#enabled = true
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# Indicates whether the LLVM build is a Release or Debug build
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#optimize = true
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@ -996,10 +996,7 @@ impl<'a> Builder<'a> {
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// For other crates, however, we know that we've already got a standard
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// library up and running, so we can use the normal compiler to compile
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// build scripts in that situation.
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//
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// If LLVM support is disabled we need to use the snapshot compiler to compile
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// build scripts, as the new compiler doesn't support executables.
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if mode == Mode::Std || !self.config.llvm_enabled {
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if mode == Mode::Std {
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cargo
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.env("RUSTC_SNAPSHOT", &self.initial_rustc)
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.env("RUSTC_SNAPSHOT_LIBDIR", self.rustc_snapshot_libdir());
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@ -64,7 +64,6 @@ pub struct Config {
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pub backtrace_on_ice: bool,
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// llvm codegen options
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pub llvm_enabled: bool,
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pub llvm_assertions: bool,
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pub llvm_optimize: bool,
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pub llvm_thin_lto: bool,
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@ -244,7 +243,6 @@ struct Install {
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#[derive(Deserialize, Default)]
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#[serde(deny_unknown_fields, rename_all = "kebab-case")]
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struct Llvm {
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enabled: Option<bool>,
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ccache: Option<StringOrBool>,
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ninja: Option<bool>,
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assertions: Option<bool>,
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@ -360,7 +358,6 @@ impl Config {
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pub fn default_opts() -> Config {
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let mut config = Config::default();
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config.llvm_enabled = true;
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config.llvm_optimize = true;
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config.llvm_version_check = true;
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config.backtrace = true;
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@ -512,7 +509,6 @@ impl Config {
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Some(StringOrBool::Bool(false)) | None => {}
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}
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set(&mut config.ninja, llvm.ninja);
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set(&mut config.llvm_enabled, llvm.enabled);
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llvm_assertions = llvm.assertions;
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set(&mut config.llvm_optimize, llvm.optimize);
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set(&mut config.llvm_thin_lto, llvm.thin_lto);
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@ -671,6 +667,11 @@ impl Config {
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pub fn very_verbose(&self) -> bool {
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self.verbose > 1
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}
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pub fn llvm_enabled(&self) -> bool {
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self.rust_codegen_backends.contains(&INTERNER.intern_str("llvm"))
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|| self.rust_codegen_backends.contains(&INTERNER.intern_str("emscripten"))
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}
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}
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fn set<T>(field: &mut T, val: Option<T>) {
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@ -1194,7 +1194,7 @@ impl Step for Compiletest {
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cmd.arg("--quiet");
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}
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if builder.config.llvm_enabled {
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if builder.config.llvm_enabled() {
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let llvm_config = builder.ensure(native::Llvm {
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target: builder.config.build,
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emscripten: false,
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@ -1227,12 +1227,6 @@ impl Step for Compiletest {
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}
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}
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}
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if suite == "run-make-fulldeps" && !builder.config.llvm_enabled {
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builder.info(
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"Ignoring run-make test suite as they generally don't work without LLVM"
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);
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return;
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}
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if suite != "run-make-fulldeps" {
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cmd.arg("--cc")
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@ -700,7 +700,7 @@ impl<'a> Builder<'a> {
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}
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fn llvm_bin_path(&self) -> Option<PathBuf> {
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if self.config.llvm_enabled {
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if self.config.llvm_enabled() {
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let llvm_config = self.ensure(native::Llvm {
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target: self.config.build,
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emscripten: false,
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@ -21,4 +21,3 @@ rustc_target = { path = "../librustc_target" }
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rustc_data_structures = { path = "../librustc_data_structures" }
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rustc_metadata = { path = "../librustc_metadata" }
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rustc_mir = { path = "../librustc_mir" }
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rustc_incremental = { path = "../librustc_incremental" }
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@ -10,27 +10,16 @@
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#![feature(box_syntax)]
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use std::any::Any;
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use std::io::Write;
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use std::fs;
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use std::path::Path;
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use std::sync::{mpsc, Arc};
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use rustc_data_structures::owning_ref::OwningRef;
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use flate2::Compression;
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use flate2::write::DeflateEncoder;
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use std::sync::mpsc;
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use syntax::symbol::Symbol;
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use rustc::hir::def_id::LOCAL_CRATE;
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use rustc::session::Session;
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use rustc::util::common::ErrorReported;
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use rustc::session::config::{CrateType, OutputFilenames, PrintRequest};
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use rustc::session::config::{OutputFilenames, PrintRequest};
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use rustc::ty::TyCtxt;
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use rustc::ty::query::Providers;
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use rustc::middle::cstore::EncodedMetadata;
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use rustc::middle::cstore::MetadataLoader;
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use rustc::dep_graph::DepGraph;
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use rustc_target::spec::Target;
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use crate::link::out_filename;
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pub use rustc_data_structures::sync::MetadataRef;
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@ -64,134 +53,3 @@ pub trait CodegenBackend {
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outputs: &OutputFilenames,
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) -> Result<(), ErrorReported>;
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}
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pub struct NoLlvmMetadataLoader;
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impl MetadataLoader for NoLlvmMetadataLoader {
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fn get_rlib_metadata(&self, _: &Target, filename: &Path) -> Result<MetadataRef, String> {
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let buf = fs::read(filename).map_err(|e| format!("metadata file open err: {:?}", e))?;
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let buf: OwningRef<Vec<u8>, [u8]> = OwningRef::new(buf);
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Ok(rustc_erase_owner!(buf.map_owner_box()))
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}
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fn get_dylib_metadata(&self, target: &Target, filename: &Path) -> Result<MetadataRef, String> {
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self.get_rlib_metadata(target, filename)
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}
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}
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pub struct MetadataOnlyCodegenBackend(());
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pub struct OngoingCodegen {
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metadata: EncodedMetadata,
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metadata_version: Vec<u8>,
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crate_name: Symbol,
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}
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impl MetadataOnlyCodegenBackend {
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pub fn boxed() -> Box<dyn CodegenBackend> {
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box MetadataOnlyCodegenBackend(())
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}
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}
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impl CodegenBackend for MetadataOnlyCodegenBackend {
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fn init(&self, sess: &Session) {
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for cty in sess.opts.crate_types.iter() {
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match *cty {
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CrateType::Rlib | CrateType::Dylib | CrateType::Executable => {},
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_ => {
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sess.diagnostic().warn(
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&format!("LLVM unsupported, so output type {} is not supported", cty)
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);
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},
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}
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}
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}
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fn metadata_loader(&self) -> Box<dyn MetadataLoader + Sync> {
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box NoLlvmMetadataLoader
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}
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fn provide(&self, providers: &mut Providers<'_>) {
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crate::symbol_names::provide(providers);
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providers.target_features_whitelist = |_tcx, _cnum| {
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Default::default() // Just a dummy
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};
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providers.is_reachable_non_generic = |_tcx, _defid| true;
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providers.exported_symbols = |_tcx, _crate| Arc::new(Vec::new());
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}
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fn provide_extern(&self, providers: &mut Providers<'_>) {
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providers.is_reachable_non_generic = |_tcx, _defid| true;
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}
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fn codegen_crate<'a, 'tcx>(
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&self,
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tcx: TyCtxt<'a, 'tcx, 'tcx>,
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_rx: mpsc::Receiver<Box<dyn Any + Send>>
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) -> Box<dyn Any> {
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use rustc_mir::monomorphize::item::MonoItem;
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crate::check_for_rustc_errors_attr(tcx);
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crate::symbol_names_test::report_symbol_names(tcx);
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rustc_incremental::assert_dep_graph(tcx);
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rustc_incremental::assert_module_sources::assert_module_sources(tcx);
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// FIXME: Fix this
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// rustc::middle::dependency_format::calculate(tcx);
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let _ = tcx.link_args(LOCAL_CRATE);
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let _ = tcx.native_libraries(LOCAL_CRATE);
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let (_, cgus) = tcx.collect_and_partition_mono_items(LOCAL_CRATE);
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for (mono_item, _) in cgus.iter().flat_map(|cgu| cgu.items().iter()) {
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if let MonoItem::Fn(inst) = mono_item {
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let def_id = inst.def_id();
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if def_id.is_local() {
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let _ = tcx.codegen_fn_attrs(def_id);
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}
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}
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}
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tcx.sess.abort_if_errors();
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let metadata = tcx.encode_metadata();
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box OngoingCodegen {
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metadata,
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metadata_version: tcx.metadata_encoding_version().to_vec(),
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crate_name: tcx.crate_name(LOCAL_CRATE),
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}
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}
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fn join_codegen_and_link(
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&self,
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ongoing_codegen: Box<dyn Any>,
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sess: &Session,
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_dep_graph: &DepGraph,
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outputs: &OutputFilenames,
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) -> Result<(), ErrorReported> {
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let ongoing_codegen = ongoing_codegen.downcast::<OngoingCodegen>()
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.expect("Expected MetadataOnlyCodegenBackend's OngoingCodegen, found Box<dyn Any>");
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for &crate_type in sess.opts.crate_types.iter() {
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if crate_type != CrateType::Rlib &&
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crate_type != CrateType::Dylib {
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continue;
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}
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let output_name =
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out_filename(sess, crate_type, &outputs, &ongoing_codegen.crate_name.as_str());
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let mut compressed = ongoing_codegen.metadata_version.clone();
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let metadata = if crate_type == CrateType::Dylib {
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DeflateEncoder::new(&mut compressed, Compression::fast())
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.write_all(&ongoing_codegen.metadata.raw_data)
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.unwrap();
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&compressed
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} else {
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&ongoing_codegen.metadata.raw_data
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};
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fs::write(&output_name, metadata).unwrap();
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}
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sess.abort_if_errors();
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if !sess.opts.crate_types.contains(&CrateType::Rlib)
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&& !sess.opts.crate_types.contains(&CrateType::Dylib)
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{
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sess.fatal("Executables are not supported by the metadata-only backend.");
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}
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Ok(())
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}
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}
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@ -19,7 +19,6 @@
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#[macro_use]
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extern crate rustc;
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#[macro_use] extern crate rustc_data_structures;
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use rustc::ty::TyCtxt;
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use rustc::hir::def_id::LOCAL_CRATE;
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|
@ -91,9 +91,6 @@ use syntax::feature_gate::{GatedCfg, UnstableFeatures};
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use syntax::parse::{self, PResult};
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use syntax_pos::{DUMMY_SP, MultiSpan, FileName};
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#[cfg(test)]
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mod test;
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pub mod pretty;
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/// Exit status code used for successful compilation and help output.
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@ -1,614 +0,0 @@
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//! Standalone tests for the inference module.
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use errors::emitter::Emitter;
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use errors::{DiagnosticBuilder, Level};
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use rustc::hir;
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use rustc::infer::outlives::env::OutlivesEnvironment;
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use rustc::infer::{self, InferOk, InferResult, SuppressRegionErrors};
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use rustc::middle::region;
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use rustc::session::{DiagnosticOutput, config};
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use rustc::traits::ObligationCause;
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use rustc::ty::subst::Subst;
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use rustc::ty::{self, Ty, TyCtxt, TypeFoldable};
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use rustc_data_structures::sync;
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use rustc_target::spec::abi::Abi;
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use rustc_interface::interface;
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use syntax::ast;
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use syntax::feature_gate::UnstableFeatures;
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use syntax::source_map::FileName;
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use syntax::symbol::Symbol;
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struct Env<'a, 'gcx: 'a + 'tcx, 'tcx: 'a> {
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infcx: &'a infer::InferCtxt<'a, 'gcx, 'tcx>,
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region_scope_tree: &'a mut region::ScopeTree,
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param_env: ty::ParamEnv<'tcx>,
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}
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struct RH<'a> {
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id: hir::ItemLocalId,
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sub: &'a [RH<'a>],
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}
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const EMPTY_SOURCE_STR: &'static str = "#![feature(no_core)] #![no_core]";
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struct ExpectErrorEmitter {
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messages: Vec<String>,
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}
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|
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fn remove_message(e: &mut ExpectErrorEmitter, msg: &str, lvl: Level) {
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match lvl {
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Level::Bug | Level::Fatal | Level::Error => {}
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_ => {
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return;
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}
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}
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|
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debug!("Error: {}", msg);
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match e.messages.iter().position(|m| msg.contains(m)) {
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Some(i) => {
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e.messages.remove(i);
|
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}
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None => {
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debug!("Unexpected error: {} Expected: {:?}", msg, e.messages);
|
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panic!("Unexpected error: {} Expected: {:?}", msg, e.messages);
|
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}
|
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}
|
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}
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|
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impl Emitter for ExpectErrorEmitter {
|
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fn emit(&mut self, db: &DiagnosticBuilder) {
|
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remove_message(self, &db.message(), db.level);
|
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for child in &db.children {
|
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remove_message(self, &child.message(), child.level);
|
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}
|
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}
|
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}
|
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|
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fn errors(msgs: &[&str]) -> (Box<dyn Emitter + Send + sync::Send>, usize) {
|
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let mut v: Vec<_> = msgs.iter().map(|m| m.to_string()).collect();
|
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if !v.is_empty() {
|
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v.push("aborting due to previous error".to_owned());
|
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}
|
||||
(
|
||||
box ExpectErrorEmitter { messages: v } as Box<dyn Emitter + Send + sync::Send>,
|
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msgs.len(),
|
||||
)
|
||||
}
|
||||
|
||||
fn test_env<F>(
|
||||
source_string: &str,
|
||||
(emitter, expected_err_count): (Box<dyn Emitter + Send + sync::Send>, usize),
|
||||
body: F,
|
||||
)
|
||||
where
|
||||
F: FnOnce(Env) + Send,
|
||||
{
|
||||
let mut opts = config::Options::default();
|
||||
opts.debugging_opts.verbose = true;
|
||||
opts.unstable_features = UnstableFeatures::Allow;
|
||||
|
||||
// When we're compiling this library with `--test` it'll run as a binary but
|
||||
// not actually exercise much functionality.
|
||||
// As a result most of the logic loading the codegen backend is defunkt
|
||||
// (it assumes we're a dynamic library in a sysroot)
|
||||
// so let's just use the metadata only backend which doesn't need to load any libraries.
|
||||
opts.debugging_opts.codegen_backend = Some("metadata_only".to_owned());
|
||||
|
||||
let input = config::Input::Str {
|
||||
name: FileName::anon_source_code(&source_string),
|
||||
input: source_string.to_string(),
|
||||
};
|
||||
|
||||
let config = interface::Config {
|
||||
opts,
|
||||
crate_cfg: Default::default(),
|
||||
input,
|
||||
input_path: None,
|
||||
output_file: None,
|
||||
output_dir: None,
|
||||
file_loader: None,
|
||||
diagnostic_output: DiagnosticOutput::Emitter(emitter),
|
||||
stderr: None,
|
||||
crate_name: Some("test".to_owned()),
|
||||
lint_caps: Default::default(),
|
||||
};
|
||||
|
||||
interface::run_compiler(config, |compiler| {
|
||||
compiler.global_ctxt().unwrap().peek_mut().enter(|tcx| {
|
||||
tcx.infer_ctxt().enter(|infcx| {
|
||||
let mut region_scope_tree = region::ScopeTree::default();
|
||||
let param_env = ty::ParamEnv::empty();
|
||||
body(Env {
|
||||
infcx: &infcx,
|
||||
region_scope_tree: &mut region_scope_tree,
|
||||
param_env: param_env,
|
||||
});
|
||||
let outlives_env = OutlivesEnvironment::new(param_env);
|
||||
let def_id = tcx.hir().local_def_id(ast::CRATE_NODE_ID);
|
||||
infcx.resolve_regions_and_report_errors(
|
||||
def_id,
|
||||
®ion_scope_tree,
|
||||
&outlives_env,
|
||||
SuppressRegionErrors::default(),
|
||||
);
|
||||
assert_eq!(tcx.sess.err_count(), expected_err_count);
|
||||
});
|
||||
})
|
||||
});
|
||||
}
|
||||
|
||||
fn d1() -> ty::DebruijnIndex {
|
||||
ty::INNERMOST
|
||||
}
|
||||
|
||||
fn d2() -> ty::DebruijnIndex {
|
||||
d1().shifted_in(1)
|
||||
}
|
||||
|
||||
impl<'a, 'gcx, 'tcx> Env<'a, 'gcx, 'tcx> {
|
||||
pub fn tcx(&self) -> TyCtxt<'a, 'gcx, 'tcx> {
|
||||
self.infcx.tcx
|
||||
}
|
||||
|
||||
pub fn create_region_hierarchy(
|
||||
&mut self,
|
||||
rh: &RH,
|
||||
parent: (region::Scope, region::ScopeDepth),
|
||||
) {
|
||||
let me = region::Scope {
|
||||
id: rh.id,
|
||||
data: region::ScopeData::Node,
|
||||
};
|
||||
self.region_scope_tree.record_scope_parent(me, Some(parent));
|
||||
for child_rh in rh.sub {
|
||||
self.create_region_hierarchy(child_rh, (me, parent.1 + 1));
|
||||
}
|
||||
}
|
||||
|
||||
pub fn create_simple_region_hierarchy(&mut self) {
|
||||
// Creates a region hierarchy where 1 is root, 10 and 11 are
|
||||
// children of 1, etc.
|
||||
|
||||
let dscope = region::Scope {
|
||||
id: hir::ItemLocalId::from_u32(1),
|
||||
data: region::ScopeData::Destruction,
|
||||
};
|
||||
self.region_scope_tree.record_scope_parent(dscope, None);
|
||||
self.create_region_hierarchy(
|
||||
&RH {
|
||||
id: hir::ItemLocalId::from_u32(1),
|
||||
sub: &[
|
||||
RH {
|
||||
id: hir::ItemLocalId::from_u32(10),
|
||||
sub: &[],
|
||||
},
|
||||
RH {
|
||||
id: hir::ItemLocalId::from_u32(11),
|
||||
sub: &[],
|
||||
},
|
||||
],
|
||||
},
|
||||
(dscope, 1),
|
||||
);
|
||||
}
|
||||
|
||||
#[allow(dead_code)] // this seems like it could be useful, even if we don't use it now
|
||||
pub fn lookup_item(&self, names: &[String]) -> hir::HirId {
|
||||
return match search_mod(self, &self.infcx.tcx.hir().krate().module, 0, names) {
|
||||
Some(id) => id,
|
||||
None => {
|
||||
panic!("no item found: `{}`", names.join("::"));
|
||||
}
|
||||
};
|
||||
|
||||
fn search_mod(
|
||||
this: &Env,
|
||||
m: &hir::Mod,
|
||||
idx: usize,
|
||||
names: &[String],
|
||||
) -> Option<hir::HirId> {
|
||||
assert!(idx < names.len());
|
||||
for item in &m.item_ids {
|
||||
let item = this.infcx.tcx.hir().expect_item(item.id);
|
||||
if item.ident.to_string() == names[idx] {
|
||||
return search(this, item, idx + 1, names);
|
||||
}
|
||||
}
|
||||
return None;
|
||||
}
|
||||
|
||||
fn search(this: &Env, it: &hir::Item, idx: usize, names: &[String]) -> Option<hir::HirId> {
|
||||
if idx == names.len() {
|
||||
return Some(it.hir_id);
|
||||
}
|
||||
|
||||
return match it.node {
|
||||
hir::ItemKind::Use(..)
|
||||
| hir::ItemKind::ExternCrate(..)
|
||||
| hir::ItemKind::Const(..)
|
||||
| hir::ItemKind::Static(..)
|
||||
| hir::ItemKind::Fn(..)
|
||||
| hir::ItemKind::ForeignMod(..)
|
||||
| hir::ItemKind::GlobalAsm(..)
|
||||
| hir::ItemKind::Existential(..)
|
||||
| hir::ItemKind::Ty(..) => None,
|
||||
|
||||
hir::ItemKind::Enum(..)
|
||||
| hir::ItemKind::Struct(..)
|
||||
| hir::ItemKind::Union(..)
|
||||
| hir::ItemKind::Trait(..)
|
||||
| hir::ItemKind::TraitAlias(..)
|
||||
| hir::ItemKind::Impl(..) => None,
|
||||
|
||||
hir::ItemKind::Mod(ref m) => search_mod(this, m, idx, names),
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
pub fn make_subtype(&self, a: Ty<'tcx>, b: Ty<'tcx>) -> bool {
|
||||
match self.infcx
|
||||
.at(&ObligationCause::dummy(), self.param_env)
|
||||
.sub(a, b)
|
||||
{
|
||||
Ok(_) => true,
|
||||
Err(ref e) => panic!("Encountered error: {}", e),
|
||||
}
|
||||
}
|
||||
|
||||
pub fn is_subtype(&self, a: Ty<'tcx>, b: Ty<'tcx>) -> bool {
|
||||
self.infcx.can_sub(self.param_env, a, b).is_ok()
|
||||
}
|
||||
|
||||
pub fn assert_subtype(&self, a: Ty<'tcx>, b: Ty<'tcx>) {
|
||||
if !self.is_subtype(a, b) {
|
||||
panic!("{} is not a subtype of {}, but it should be", a, b);
|
||||
}
|
||||
}
|
||||
|
||||
pub fn assert_eq(&self, a: Ty<'tcx>, b: Ty<'tcx>) {
|
||||
self.assert_subtype(a, b);
|
||||
self.assert_subtype(b, a);
|
||||
}
|
||||
|
||||
pub fn t_fn(&self, input_tys: &[Ty<'tcx>], output_ty: Ty<'tcx>) -> Ty<'tcx> {
|
||||
self.infcx
|
||||
.tcx
|
||||
.mk_fn_ptr(ty::Binder::bind(self.infcx.tcx.mk_fn_sig(
|
||||
input_tys.iter().cloned(),
|
||||
output_ty,
|
||||
false,
|
||||
hir::Unsafety::Normal,
|
||||
Abi::Rust,
|
||||
)))
|
||||
}
|
||||
|
||||
pub fn t_nil(&self) -> Ty<'tcx> {
|
||||
self.infcx.tcx.mk_unit()
|
||||
}
|
||||
|
||||
pub fn t_pair(&self, ty1: Ty<'tcx>, ty2: Ty<'tcx>) -> Ty<'tcx> {
|
||||
self.infcx.tcx.intern_tup(&[ty1, ty2])
|
||||
}
|
||||
|
||||
pub fn t_param(&self, index: u32) -> Ty<'tcx> {
|
||||
let name = format!("T{}", index);
|
||||
self.infcx
|
||||
.tcx
|
||||
.mk_ty_param(index, Symbol::intern(&name).as_interned_str())
|
||||
}
|
||||
|
||||
pub fn re_early_bound(&self, index: u32, name: &'static str) -> ty::Region<'tcx> {
|
||||
let name = Symbol::intern(name).as_interned_str();
|
||||
self.infcx
|
||||
.tcx
|
||||
.mk_region(ty::ReEarlyBound(ty::EarlyBoundRegion {
|
||||
def_id: self.infcx.tcx.hir().local_def_id(ast::CRATE_NODE_ID),
|
||||
index,
|
||||
name,
|
||||
}))
|
||||
}
|
||||
|
||||
pub fn re_late_bound_with_debruijn(
|
||||
&self,
|
||||
id: u32,
|
||||
debruijn: ty::DebruijnIndex,
|
||||
) -> ty::Region<'tcx> {
|
||||
self.infcx
|
||||
.tcx
|
||||
.mk_region(ty::ReLateBound(debruijn, ty::BrAnon(id)))
|
||||
}
|
||||
|
||||
pub fn t_rptr(&self, r: ty::Region<'tcx>) -> Ty<'tcx> {
|
||||
self.infcx.tcx.mk_imm_ref(r, self.tcx().types.isize)
|
||||
}
|
||||
|
||||
pub fn t_rptr_late_bound(&self, id: u32) -> Ty<'tcx> {
|
||||
let r = self.re_late_bound_with_debruijn(id, d1());
|
||||
self.infcx.tcx.mk_imm_ref(r, self.tcx().types.isize)
|
||||
}
|
||||
|
||||
pub fn t_rptr_late_bound_with_debruijn(
|
||||
&self,
|
||||
id: u32,
|
||||
debruijn: ty::DebruijnIndex,
|
||||
) -> Ty<'tcx> {
|
||||
let r = self.re_late_bound_with_debruijn(id, debruijn);
|
||||
self.infcx.tcx.mk_imm_ref(r, self.tcx().types.isize)
|
||||
}
|
||||
|
||||
pub fn t_rptr_scope(&self, id: u32) -> Ty<'tcx> {
|
||||
let r = ty::ReScope(region::Scope {
|
||||
id: hir::ItemLocalId::from_u32(id),
|
||||
data: region::ScopeData::Node,
|
||||
});
|
||||
self.infcx
|
||||
.tcx
|
||||
.mk_imm_ref(self.infcx.tcx.mk_region(r), self.tcx().types.isize)
|
||||
}
|
||||
|
||||
pub fn re_free(&self, id: u32) -> ty::Region<'tcx> {
|
||||
self.infcx.tcx.mk_region(ty::ReFree(ty::FreeRegion {
|
||||
scope: self.infcx.tcx.hir().local_def_id(ast::CRATE_NODE_ID),
|
||||
bound_region: ty::BrAnon(id),
|
||||
}))
|
||||
}
|
||||
|
||||
pub fn t_rptr_free(&self, id: u32) -> Ty<'tcx> {
|
||||
let r = self.re_free(id);
|
||||
self.infcx.tcx.mk_imm_ref(r, self.tcx().types.isize)
|
||||
}
|
||||
|
||||
pub fn sub(&self, t1: Ty<'tcx>, t2: Ty<'tcx>) -> InferResult<'tcx, ()> {
|
||||
self.infcx
|
||||
.at(&ObligationCause::dummy(), self.param_env)
|
||||
.sub(t1, t2)
|
||||
}
|
||||
|
||||
/// Checks that `t1 <: t2` is true (this may register additional
|
||||
/// region checks).
|
||||
pub fn check_sub(&self, t1: Ty<'tcx>, t2: Ty<'tcx>) {
|
||||
match self.sub(t1, t2) {
|
||||
Ok(InferOk {
|
||||
obligations,
|
||||
value: (),
|
||||
}) => {
|
||||
// None of these tests should require nested obligations.
|
||||
assert!(obligations.is_empty());
|
||||
}
|
||||
Err(ref e) => {
|
||||
panic!("unexpected error computing sub({:?},{:?}): {}", t1, t2, e);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn contravariant_region_ptr_ok() {
|
||||
test_env(EMPTY_SOURCE_STR, errors(&[]), |mut env| {
|
||||
env.create_simple_region_hierarchy();
|
||||
let t_rptr1 = env.t_rptr_scope(1);
|
||||
let t_rptr10 = env.t_rptr_scope(10);
|
||||
env.assert_eq(t_rptr1, t_rptr1);
|
||||
env.assert_eq(t_rptr10, t_rptr10);
|
||||
env.make_subtype(t_rptr1, t_rptr10);
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn contravariant_region_ptr_err() {
|
||||
test_env(EMPTY_SOURCE_STR, errors(&["mismatched types"]), |mut env| {
|
||||
env.create_simple_region_hierarchy();
|
||||
let t_rptr1 = env.t_rptr_scope(1);
|
||||
let t_rptr10 = env.t_rptr_scope(10);
|
||||
env.assert_eq(t_rptr1, t_rptr1);
|
||||
env.assert_eq(t_rptr10, t_rptr10);
|
||||
|
||||
// This will cause an error when regions are resolved.
|
||||
env.make_subtype(t_rptr10, t_rptr1);
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn sub_bound_free_true() {
|
||||
//! Test that:
|
||||
//!
|
||||
//! for<'a> fn(&'a isize) <: fn(&'b isize)
|
||||
//!
|
||||
//! *does* hold.
|
||||
|
||||
test_env(EMPTY_SOURCE_STR, errors(&[]), |mut env| {
|
||||
env.create_simple_region_hierarchy();
|
||||
let t_rptr_bound1 = env.t_rptr_late_bound(1);
|
||||
let t_rptr_free1 = env.t_rptr_free(1);
|
||||
env.check_sub(
|
||||
env.t_fn(&[t_rptr_bound1], env.tcx().types.isize),
|
||||
env.t_fn(&[t_rptr_free1], env.tcx().types.isize),
|
||||
);
|
||||
})
|
||||
}
|
||||
|
||||
/// Test substituting a bound region into a function, which introduces another level of binding.
|
||||
/// This requires adjusting the Debruijn index.
|
||||
#[test]
|
||||
fn subst_ty_renumber_bound() {
|
||||
test_env(EMPTY_SOURCE_STR, errors(&[]), |env| {
|
||||
// Situation:
|
||||
// Theta = [A -> &'a foo]
|
||||
|
||||
let t_rptr_bound1 = env.t_rptr_late_bound(1);
|
||||
|
||||
// t_source = fn(A)
|
||||
let t_source = {
|
||||
let t_param = env.t_param(0);
|
||||
env.t_fn(&[t_param], env.t_nil())
|
||||
};
|
||||
|
||||
let substs = env.infcx.tcx.intern_substs(&[t_rptr_bound1.into()]);
|
||||
let t_substituted = t_source.subst(env.infcx.tcx, substs);
|
||||
|
||||
// t_expected = fn(&'a isize)
|
||||
let t_expected = {
|
||||
let t_ptr_bound2 = env.t_rptr_late_bound_with_debruijn(1, d2());
|
||||
env.t_fn(&[t_ptr_bound2], env.t_nil())
|
||||
};
|
||||
|
||||
debug!(
|
||||
"subst_bound: t_source={:?} substs={:?} t_substituted={:?} t_expected={:?}",
|
||||
t_source, substs, t_substituted, t_expected
|
||||
);
|
||||
|
||||
assert_eq!(t_substituted, t_expected);
|
||||
})
|
||||
}
|
||||
|
||||
/// Tests substituting a bound region into a function, which introduces another level of binding.
|
||||
/// This requires adjusting the De Bruijn index.
|
||||
#[test]
|
||||
fn subst_ty_renumber_some_bounds() {
|
||||
test_env(EMPTY_SOURCE_STR, errors(&[]), |env| {
|
||||
// Situation:
|
||||
// `Theta = [A -> &'a foo]`
|
||||
|
||||
let t_rptr_bound1 = env.t_rptr_late_bound(1);
|
||||
|
||||
// `t_source = (A, fn(A))`
|
||||
let t_source = {
|
||||
let t_param = env.t_param(0);
|
||||
env.t_pair(t_param, env.t_fn(&[t_param], env.t_nil()))
|
||||
};
|
||||
|
||||
let substs = env.infcx.tcx.intern_substs(&[t_rptr_bound1.into()]);
|
||||
let t_substituted = t_source.subst(env.infcx.tcx, substs);
|
||||
|
||||
// `t_expected = (&'a isize, fn(&'a isize))`
|
||||
//
|
||||
// However, note that the Debruijn index is different in the different cases.
|
||||
let t_expected = {
|
||||
let t_rptr_bound2 = env.t_rptr_late_bound_with_debruijn(1, d2());
|
||||
env.t_pair(t_rptr_bound1, env.t_fn(&[t_rptr_bound2], env.t_nil()))
|
||||
};
|
||||
|
||||
debug!(
|
||||
"subst_bound: t_source={:?} substs={:?} t_substituted={:?} t_expected={:?}",
|
||||
t_source, substs, t_substituted, t_expected
|
||||
);
|
||||
|
||||
assert_eq!(t_substituted, t_expected);
|
||||
})
|
||||
}
|
||||
|
||||
/// Tests that we correctly compute whether a type has escaping regions or not.
|
||||
#[test]
|
||||
fn escaping() {
|
||||
test_env(EMPTY_SOURCE_STR, errors(&[]), |mut env| {
|
||||
// Situation:
|
||||
// `Theta = [A -> &'a foo]`
|
||||
env.create_simple_region_hierarchy();
|
||||
|
||||
assert!(!env.t_nil().has_escaping_bound_vars());
|
||||
|
||||
let t_rptr_free1 = env.t_rptr_free(1);
|
||||
assert!(!t_rptr_free1.has_escaping_bound_vars());
|
||||
|
||||
let t_rptr_bound1 = env.t_rptr_late_bound_with_debruijn(1, d1());
|
||||
assert!(t_rptr_bound1.has_escaping_bound_vars());
|
||||
|
||||
let t_rptr_bound2 = env.t_rptr_late_bound_with_debruijn(1, d2());
|
||||
assert!(t_rptr_bound2.has_escaping_bound_vars());
|
||||
|
||||
// `t_fn = fn(A)`
|
||||
let t_param = env.t_param(0);
|
||||
assert!(!t_param.has_escaping_bound_vars());
|
||||
let t_fn = env.t_fn(&[t_param], env.t_nil());
|
||||
assert!(!t_fn.has_escaping_bound_vars());
|
||||
})
|
||||
}
|
||||
|
||||
/// Tests applying a substitution where the value being substituted for an early-bound region is a
|
||||
/// late-bound region.
|
||||
#[test]
|
||||
fn subst_region_renumber_region() {
|
||||
test_env(EMPTY_SOURCE_STR, errors(&[]), |env| {
|
||||
let re_bound1 = env.re_late_bound_with_debruijn(1, d1());
|
||||
|
||||
// `type t_source<'a> = fn(&'a isize)`
|
||||
let t_source = {
|
||||
let re_early = env.re_early_bound(0, "'a");
|
||||
env.t_fn(&[env.t_rptr(re_early)], env.t_nil())
|
||||
};
|
||||
|
||||
let substs = env.infcx.tcx.intern_substs(&[re_bound1.into()]);
|
||||
let t_substituted = t_source.subst(env.infcx.tcx, substs);
|
||||
|
||||
// `t_expected = fn(&'a isize)`
|
||||
//
|
||||
// but not that the Debruijn index is different in the different cases.
|
||||
let t_expected = {
|
||||
let t_rptr_bound2 = env.t_rptr_late_bound_with_debruijn(1, d2());
|
||||
env.t_fn(&[t_rptr_bound2], env.t_nil())
|
||||
};
|
||||
|
||||
debug!(
|
||||
"subst_bound: t_source={:?} substs={:?} t_substituted={:?} t_expected={:?}",
|
||||
t_source, substs, t_substituted, t_expected
|
||||
);
|
||||
|
||||
assert_eq!(t_substituted, t_expected);
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn walk_ty() {
|
||||
test_env(EMPTY_SOURCE_STR, errors(&[]), |env| {
|
||||
let tcx = env.infcx.tcx;
|
||||
let int_ty = tcx.types.isize;
|
||||
let usize_ty = tcx.types.usize;
|
||||
let tup1_ty = tcx.intern_tup(&[int_ty, usize_ty, int_ty, usize_ty]);
|
||||
let tup2_ty = tcx.intern_tup(&[tup1_ty, tup1_ty, usize_ty]);
|
||||
let walked: Vec<_> = tup2_ty.walk().collect();
|
||||
assert_eq!(
|
||||
walked,
|
||||
[
|
||||
tup2_ty, tup1_ty, int_ty, usize_ty, int_ty, usize_ty, tup1_ty, int_ty, usize_ty,
|
||||
int_ty, usize_ty, usize_ty
|
||||
]
|
||||
);
|
||||
})
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn walk_ty_skip_subtree() {
|
||||
test_env(EMPTY_SOURCE_STR, errors(&[]), |env| {
|
||||
let tcx = env.infcx.tcx;
|
||||
let int_ty = tcx.types.isize;
|
||||
let usize_ty = tcx.types.usize;
|
||||
let tup1_ty = tcx.intern_tup(&[int_ty, usize_ty, int_ty, usize_ty]);
|
||||
let tup2_ty = tcx.intern_tup(&[tup1_ty, tup1_ty, usize_ty]);
|
||||
|
||||
// types we expect to see (in order), plus a boolean saying
|
||||
// whether to skip the subtree.
|
||||
let mut expected = vec![
|
||||
(tup2_ty, false),
|
||||
(tup1_ty, false),
|
||||
(int_ty, false),
|
||||
(usize_ty, false),
|
||||
(int_ty, false),
|
||||
(usize_ty, false),
|
||||
(tup1_ty, true), // skip the isize/usize/isize/usize
|
||||
(usize_ty, false),
|
||||
];
|
||||
expected.reverse();
|
||||
|
||||
let mut walker = tup2_ty.walk();
|
||||
while let Some(t) = walker.next() {
|
||||
debug!("walked to {:?}", t);
|
||||
let (expected_ty, skip) = expected.pop().unwrap();
|
||||
assert_eq!(t, expected_ty);
|
||||
if skip {
|
||||
walker.skip_current_subtree();
|
||||
}
|
||||
}
|
||||
|
||||
assert!(expected.is_empty());
|
||||
})
|
||||
}
|
@ -266,9 +266,6 @@ pub fn get_codegen_backend(sess: &Session) -> Box<dyn CodegenBackend> {
|
||||
let codegen_name = sess.opts.debugging_opts.codegen_backend.as_ref()
|
||||
.unwrap_or(&sess.target.target.options.codegen_backend);
|
||||
let backend = match &codegen_name[..] {
|
||||
"metadata_only" => {
|
||||
rustc_codegen_utils::codegen_backend::MetadataOnlyCodegenBackend::boxed
|
||||
}
|
||||
filename if filename.contains(".") => {
|
||||
load_backend_from_dylib(filename.as_ref())
|
||||
}
|
||||
|
@ -3,9 +3,13 @@
|
||||
extern crate syntax;
|
||||
extern crate rustc;
|
||||
extern crate rustc_codegen_utils;
|
||||
#[macro_use]
|
||||
extern crate rustc_data_structures;
|
||||
extern crate rustc_target;
|
||||
|
||||
use std::any::Any;
|
||||
use std::sync::mpsc;
|
||||
use std::sync::{Arc, mpsc};
|
||||
use std::path::Path;
|
||||
use syntax::symbol::Symbol;
|
||||
use rustc::session::Session;
|
||||
use rustc::session::config::OutputFilenames;
|
||||
@ -14,21 +18,44 @@ use rustc::ty::query::Providers;
|
||||
use rustc::middle::cstore::MetadataLoader;
|
||||
use rustc::dep_graph::DepGraph;
|
||||
use rustc::util::common::ErrorReported;
|
||||
use rustc_codegen_utils::codegen_backend::{CodegenBackend, MetadataOnlyCodegenBackend};
|
||||
use rustc_codegen_utils::codegen_backend::CodegenBackend;
|
||||
use rustc_data_structures::sync::MetadataRef;
|
||||
use rustc_data_structures::owning_ref::OwningRef;
|
||||
use rustc_target::spec::Target;
|
||||
|
||||
struct TheBackend(Box<CodegenBackend>);
|
||||
pub struct NoLlvmMetadataLoader;
|
||||
|
||||
impl MetadataLoader for NoLlvmMetadataLoader {
|
||||
fn get_rlib_metadata(&self, _: &Target, filename: &Path) -> Result<MetadataRef, String> {
|
||||
let buf = std::fs::read(filename).map_err(|e| format!("metadata file open err: {:?}", e))?;
|
||||
let buf: OwningRef<Vec<u8>, [u8]> = OwningRef::new(buf);
|
||||
Ok(rustc_erase_owner!(buf.map_owner_box()))
|
||||
}
|
||||
|
||||
fn get_dylib_metadata(&self, target: &Target, filename: &Path) -> Result<MetadataRef, String> {
|
||||
self.get_rlib_metadata(target, filename)
|
||||
}
|
||||
}
|
||||
|
||||
struct TheBackend;
|
||||
|
||||
impl CodegenBackend for TheBackend {
|
||||
fn metadata_loader(&self) -> Box<MetadataLoader + Sync> {
|
||||
self.0.metadata_loader()
|
||||
Box::new(NoLlvmMetadataLoader)
|
||||
}
|
||||
|
||||
fn provide(&self, providers: &mut Providers) {
|
||||
self.0.provide(providers);
|
||||
rustc_codegen_utils::symbol_names::provide(providers);
|
||||
|
||||
providers.target_features_whitelist = |_tcx, _cnum| {
|
||||
Default::default() // Just a dummy
|
||||
};
|
||||
providers.is_reachable_non_generic = |_tcx, _defid| true;
|
||||
providers.exported_symbols = |_tcx, _crate| Arc::new(Vec::new());
|
||||
}
|
||||
|
||||
fn provide_extern(&self, providers: &mut Providers) {
|
||||
self.0.provide_extern(providers);
|
||||
providers.is_reachable_non_generic = |_tcx, _defid| true;
|
||||
}
|
||||
|
||||
fn codegen_crate<'a, 'tcx>(
|
||||
@ -69,5 +96,5 @@ impl CodegenBackend for TheBackend {
|
||||
/// This is the entrypoint for a hot plugged rustc_codegen_llvm
|
||||
#[no_mangle]
|
||||
pub fn __rustc_codegen_backend() -> Box<CodegenBackend> {
|
||||
Box::new(TheBackend(MetadataOnlyCodegenBackend::boxed()))
|
||||
Box::new(TheBackend)
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user