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use hir::def_id::{DefId, CrateNum, LOCAL_CRATE};
use syntax::ast::NodeId;
use syntax::symbol::{Symbol, InternedString};
use ty::{Instance, TyCtxt};
use util::nodemap::FxHashMap;
use rustc_data_structures::base_n;
use rustc_data_structures::stable_hasher::{HashStable, StableHasherResult,
StableHasher};
use ich::{Fingerprint, StableHashingContext, NodeIdHashingMode};
use std::fmt;
use std::hash::Hash;
#[derive(PartialEq, Eq, Clone, Copy, Debug, Hash)]
pub enum MonoItem<'tcx> {
Fn(Instance<'tcx>),
Static(DefId),
GlobalAsm(NodeId),
}
impl<'tcx> MonoItem<'tcx> {
pub fn size_estimate<'a>(&self, tcx: &TyCtxt<'a, 'tcx, 'tcx>) -> usize {
match *self {
MonoItem::Fn(instance) => {
tcx.instance_def_size_estimate(instance.def)
},
MonoItem::Static(_) |
MonoItem::GlobalAsm(_) => 1,
}
}
}
impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for MonoItem<'tcx> {
fn hash_stable<W: StableHasherResult>(&self,
hcx: &mut StableHashingContext<'a>,
hasher: &mut StableHasher<W>) {
::std::mem::discriminant(self).hash_stable(hcx, hasher);
match *self {
MonoItem::Fn(ref instance) => {
instance.hash_stable(hcx, hasher);
}
MonoItem::Static(def_id) => {
def_id.hash_stable(hcx, hasher);
}
MonoItem::GlobalAsm(node_id) => {
hcx.with_node_id_hashing_mode(NodeIdHashingMode::HashDefPath, |hcx| {
node_id.hash_stable(hcx, hasher);
})
}
}
}
}
pub struct CodegenUnit<'tcx> {
name: InternedString,
items: FxHashMap<MonoItem<'tcx>, (Linkage, Visibility)>,
size_estimate: Option<usize>,
}
#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug, RustcEncodable, RustcDecodable)]
pub enum Linkage {
External,
AvailableExternally,
LinkOnceAny,
LinkOnceODR,
WeakAny,
WeakODR,
Appending,
Internal,
Private,
ExternalWeak,
Common,
}
impl_stable_hash_for!(enum self::Linkage {
External,
AvailableExternally,
LinkOnceAny,
LinkOnceODR,
WeakAny,
WeakODR,
Appending,
Internal,
Private,
ExternalWeak,
Common
});
#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
pub enum Visibility {
Default,
Hidden,
Protected,
}
impl_stable_hash_for!(enum self::Visibility {
Default,
Hidden,
Protected
});
impl<'tcx> CodegenUnit<'tcx> {
pub fn new(name: InternedString) -> CodegenUnit<'tcx> {
CodegenUnit {
name: name,
items: FxHashMap(),
size_estimate: None,
}
}
pub fn name(&self) -> &InternedString {
&self.name
}
pub fn set_name(&mut self, name: InternedString) {
self.name = name;
}
pub fn items(&self) -> &FxHashMap<MonoItem<'tcx>, (Linkage, Visibility)> {
&self.items
}
pub fn items_mut(&mut self)
-> &mut FxHashMap<MonoItem<'tcx>, (Linkage, Visibility)>
{
&mut self.items
}
pub fn mangle_name(human_readable_name: &str) -> String {
let mut hasher = StableHasher::new();
human_readable_name.hash(&mut hasher);
let hash: u128 = hasher.finish();
let hash = hash & ((1u128 << 80) - 1);
base_n::encode(hash, base_n::CASE_INSENSITIVE)
}
pub fn estimate_size<'a>(&mut self, tcx: &TyCtxt<'a, 'tcx, 'tcx>) {
self.size_estimate = Some(self.items.keys().map(|mi| mi.size_estimate(tcx)).sum());
}
pub fn size_estimate(&self) -> usize {
self.size_estimate.expect("estimate_size must be called before getting a size_estimate")
}
pub fn modify_size_estimate(&mut self, delta: usize) {
assert!(self.size_estimate.is_some());
if let Some(size_estimate) = self.size_estimate {
self.size_estimate = Some(size_estimate + delta);
}
}
}
impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for CodegenUnit<'tcx> {
fn hash_stable<W: StableHasherResult>(&self,
hcx: &mut StableHashingContext<'a>,
hasher: &mut StableHasher<W>) {
let CodegenUnit {
ref items,
name,
size_estimate: _,
} = *self;
name.hash_stable(hcx, hasher);
let mut items: Vec<(Fingerprint, _)> = items.iter().map(|(mono_item, &attrs)| {
let mut hasher = StableHasher::new();
mono_item.hash_stable(hcx, &mut hasher);
let mono_item_fingerprint = hasher.finish();
(mono_item_fingerprint, attrs)
}).collect();
items.sort_unstable_by_key(|i| i.0);
items.hash_stable(hcx, hasher);
}
}
#[derive(Clone, Default)]
pub struct Stats {
pub n_glues_created: usize,
pub n_null_glues: usize,
pub n_real_glues: usize,
pub n_fns: usize,
pub n_inlines: usize,
pub n_closures: usize,
pub n_llvm_insns: usize,
pub llvm_insns: FxHashMap<String, usize>,
pub fn_stats: Vec<(String, usize)>,
}
impl_stable_hash_for!(struct self::Stats {
n_glues_created,
n_null_glues,
n_real_glues,
n_fns,
n_inlines,
n_closures,
n_llvm_insns,
llvm_insns,
fn_stats
});
impl Stats {
pub fn extend(&mut self, stats: Stats) {
self.n_glues_created += stats.n_glues_created;
self.n_null_glues += stats.n_null_glues;
self.n_real_glues += stats.n_real_glues;
self.n_fns += stats.n_fns;
self.n_inlines += stats.n_inlines;
self.n_closures += stats.n_closures;
self.n_llvm_insns += stats.n_llvm_insns;
for (k, v) in stats.llvm_insns {
*self.llvm_insns.entry(k).or_insert(0) += v;
}
self.fn_stats.extend(stats.fn_stats);
}
}
pub struct CodegenUnitNameBuilder<'a, 'gcx: 'tcx, 'tcx: 'a> {
tcx: TyCtxt<'a, 'gcx, 'tcx>,
cache: FxHashMap<CrateNum, String>,
}
impl<'a, 'gcx: 'tcx, 'tcx: 'a> CodegenUnitNameBuilder<'a, 'gcx, 'tcx> {
pub fn new(tcx: TyCtxt<'a, 'gcx, 'tcx>) -> Self {
CodegenUnitNameBuilder {
tcx,
cache: FxHashMap(),
}
}
pub fn build_cgu_name<I, C, S>(&mut self,
cnum: CrateNum,
components: I,
special_suffix: Option<S>)
-> InternedString
where I: IntoIterator<Item=C>,
C: fmt::Display,
S: fmt::Display,
{
let cgu_name = self.build_cgu_name_no_mangle(cnum,
components,
special_suffix);
if self.tcx.sess.opts.debugging_opts.human_readable_cgu_names {
cgu_name
} else {
let cgu_name = &cgu_name.as_str()[..];
Symbol::intern(&CodegenUnit::mangle_name(cgu_name)).as_interned_str()
}
}
pub fn build_cgu_name_no_mangle<I, C, S>(&mut self,
cnum: CrateNum,
components: I,
special_suffix: Option<S>)
-> InternedString
where I: IntoIterator<Item=C>,
C: fmt::Display,
S: fmt::Display,
{
use std::fmt::Write;
let mut cgu_name = String::with_capacity(64);
let tcx = self.tcx;
let crate_prefix = self.cache.entry(cnum).or_insert_with(|| {
let local_crate_id = if cnum != LOCAL_CRATE {
let local_crate_disambiguator =
format!("{}", tcx.crate_disambiguator(LOCAL_CRATE));
format!("-in-{}.{}",
tcx.crate_name(LOCAL_CRATE),
&local_crate_disambiguator[0 .. 8])
} else {
String::new()
};
let crate_disambiguator = format!("{}", tcx.crate_disambiguator(cnum));
format!("{}.{}{}",
tcx.crate_name(cnum),
&crate_disambiguator[0 .. 8],
local_crate_id)
});
write!(cgu_name, "{}", crate_prefix).unwrap();
for component in components {
write!(cgu_name, "-{}", component).unwrap();
}
if let Some(special_suffix) = special_suffix {
write!(cgu_name, ".{}", special_suffix).unwrap();
}
Symbol::intern(&cgu_name[..]).as_interned_str()
}
}