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Auto merge of #38653 - Mark-Simulacrum:dropless-arena, r=eddyb

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Add a DroplessArena and utilize it as a more efficient arena when possible

I will collect performance (probably just `-Ztime-passes`, and more if that shows significant differences, perhaps).

6feba98 also fixes a potential infinite loop if inplace reallocation failed for `TypedArena` (and `DroplessArena` via copied code).

r? @eddyb
This commit is contained in:
bors 2017-01-01 02:39:40 +00:00
commit 08babdb412
9 changed files with 228 additions and 100 deletions
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7
src/librustdoc/core.rs
View file

@ -15,7 +15,7 @@ use rustc::session::{self, config};
use rustc::hir::def_id::DefId;
use rustc::hir::def::{Def, ExportMap};
use rustc::middle::privacy::AccessLevels;
use rustc::ty::{self, TyCtxt, Ty};
use rustc::ty::{self, TyCtxt, GlobalArenas, Ty};
use rustc::hir::map as hir_map;
use rustc::lint;
use rustc::util::nodemap::{FxHashMap, NodeMap};
@ -37,6 +37,7 @@ use visit_ast::RustdocVisitor;
use clean;
use clean::Clean;
use html::render::RenderInfo;
use arena::DroplessArena;
pub use rustc::session::config::Input;
pub use rustc::session::search_paths::SearchPaths;
@ -160,13 +161,15 @@ pub fn run_core(search_paths: SearchPaths,
).expect("phase_2_configure_and_expand aborted in rustdoc!")
};
let arenas = ty::CtxtArenas::new();
let arena = DroplessArena::new();
let arenas = GlobalArenas::new();
let hir_map = hir_map::map_crate(&mut hir_forest, defs);
abort_on_err(driver::phase_3_run_analysis_passes(&sess,
hir_map,
analysis,
resolutions,
&arena,
&arenas,
&name,
|tcx, analysis, _, result| {