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Implement basic incremental compilation

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This commit is contained in:
bjorn3 2018-08-12 20:49:43 +02:00
parent 5859b9b65d
commit 23b4db227a
2 changed files with 22 additions and 5 deletions
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2
build.sh
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@ -20,6 +20,6 @@ $RUSTC mini_core.rs --crate-name mini_core --crate-type lib &&
$RUSTC example.rs --crate-type lib &&
$RUSTC mini_core_hello_world.rs --crate-type bin &&
$RUSTC ../target/libcore/src/libcore/lib.rs --color=always --crate-type lib 2>&1 | (head -n 20; echo "===="; tail -n 1000)
$RUSTC ../target/libcore/src/libcore/lib.rs --color=always --crate-type lib -Cincremental=../target/libcore/incremental 2>&1 | (head -n 20; echo "===="; tail -n 1000)
cat ../target/log.txt | sort | uniq -c | grep -v "rval unsize move" | grep -v "rval len"
rm *.rlib ../target/log.txt

25
src/lib.rs
View File

@ -68,7 +68,7 @@ mod prelude {
self, subst::Substs, FnSig, Instance, InstanceDef, ParamEnv, PolyFnSig, Ty, TyCtxt,
TypeAndMut, TypeFoldable, TypeVariants,
};
pub use rustc_data_structures::{indexed_vec::Idx, sync::Lrc};
pub use rustc_data_structures::{indexed_vec::Idx, sync::Lrc, fx::FxHashMap};
pub use rustc_mir::monomorphize::{collector, MonoItem};
pub use syntax::ast::{FloatTy, IntTy, UintTy};
pub use syntax::codemap::DUMMY_SP;
@ -186,6 +186,13 @@ impl CodegenBackend for CraneliftCodegenBackend {
providers.target_features_whitelist = |_tcx, _cnum| Lrc::new(Default::default());
providers.is_reachable_non_generic = |_tcx, _defid| true;
providers.exported_symbols = |_tcx, _crate| Arc::new(Vec::new());
providers.upstream_monomorphizations = |_tcx, _cnum| Lrc::new(FxHashMap());
providers.upstream_monomorphizations_for = |tcx, def_id| {
debug_assert!(!def_id.is_local());
tcx.upstream_monomorphizations(LOCAL_CRATE)
.get(&def_id)
.cloned()
};
}
fn provide_extern(&self, providers: &mut Providers) {
providers.is_reachable_non_generic = |_tcx, _defid| true;
@ -251,9 +258,13 @@ impl CodegenBackend for CraneliftCodegenBackend {
let mut log = ::std::fs::File::create("../target/log.txt").unwrap();
let before = ::std::time::Instant::now();
for mono_item in
collector::collect_crate_mono_items(tcx, collector::MonoItemCollectionMode::Eager).0
{
let mono_items = collector::collect_crate_mono_items(tcx, collector::MonoItemCollectionMode::Eager).0;
// TODO: move to the end of this function when compiling libcore doesn't have unimplemented stuff anymore
save_incremental(tcx);
tcx.sess.warn("Saved incremental data");
for mono_item in mono_items {
let cx = &mut cx;
let context = &mut context;
let res = ::std::panic::catch_unwind(::std::panic::AssertUnwindSafe(move || {
@ -371,6 +382,12 @@ impl CodegenBackend for CraneliftCodegenBackend {
}
}
fn save_incremental<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
rustc_incremental::assert_dep_graph(tcx);
rustc_incremental::save_dep_graph(tcx);
rustc_incremental::finalize_session_directory(tcx.sess, tcx.crate_hash(LOCAL_CRATE));
}
/// This is the entrypoint for a hot plugged rustc_codegen_cranelift
#[no_mangle]
pub fn __rustc_codegen_backend() -> Box<CodegenBackend> {