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Introduce -Zprofile-closures to evaluate the impact of 2229

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This creates a CSV with name "closure_profile_XXXXX.csv", where the
variable part is the process id of the compiler.

To profile a cargo project you can run one of the following depending on
if you're compiling a library or a binary:

```
cargo +stage1 rustc --lib -- -Zprofile-closures
cargo +stage1 rustc --bin -- -Zprofile-closures
```
This commit is contained in:
Aman Arora
2021-05-05 15:57:08 -04:00
parent 3e9d7ecf78
commit fc273e9bf2
9 changed files with 148 additions and 7 deletions
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18
compiler/rustc_middle/src/ty/context.rs
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@@ -19,11 +19,12 @@ use crate::ty::query::{self, OnDiskCache, TyCtxtAt};
use crate::ty::subst::{GenericArg, GenericArgKind, InternalSubsts, Subst, SubstsRef, UserSubsts};
use crate::ty::TyKind::*;
use crate::ty::{
self, AdtDef, AdtKind, Binder, BindingMode, BoundVar, CanonicalPolyFnSig, Const, ConstVid,
DefIdTree, ExistentialPredicate, FloatTy, FloatVar, FloatVid, GenericParamDefKind, InferConst,
InferTy, IntTy, IntVar, IntVid, List, MainDefinition, ParamConst, ParamTy, PolyFnSig,
Predicate, PredicateInner, PredicateKind, ProjectionTy, Region, RegionKind, ReprOptions,
TraitObjectVisitor, Ty, TyKind, TyS, TyVar, TyVid, TypeAndMut, UintTy, Visibility,
self, AdtDef, AdtKind, Binder, BindingMode, BoundVar, CanonicalPolyFnSig,
ClosureSizeProfileData, Const, ConstVid, DefIdTree, ExistentialPredicate, FloatTy, FloatVar,
FloatVid, GenericParamDefKind, InferConst, InferTy, IntTy, IntVar, IntVid, List,
MainDefinition, ParamConst, ParamTy, PolyFnSig, Predicate, PredicateInner, PredicateKind,
ProjectionTy, Region, RegionKind, ReprOptions, TraitObjectVisitor, Ty, TyKind, TyS, TyVar,
TyVid, TypeAndMut, UintTy, Visibility,
};
use rustc_ast as ast;
use rustc_ast::expand::allocator::AllocatorKind;
@@ -484,6 +485,10 @@ pub struct TypeckResults<'tcx> {
/// This hashset records all instances where we behave
/// like this to allow `const_to_pat` to reliably handle this situation.
pub treat_byte_string_as_slice: ItemLocalSet,
/// Contains the data for evaluating the effect of feature `capture_disjoint_fields`
/// on closure size.
pub closure_size_eval: FxHashMap<DefId, ClosureSizeProfileData<'tcx>>,
}
impl<'tcx> TypeckResults<'tcx> {
@@ -510,6 +515,7 @@ impl<'tcx> TypeckResults<'tcx> {
closure_fake_reads: Default::default(),
generator_interior_types: ty::Binder::dummy(Default::default()),
treat_byte_string_as_slice: Default::default(),
closure_size_eval: Default::default(),
}
}
@@ -754,6 +760,7 @@ impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for TypeckResults<'tcx> {
ref closure_fake_reads,
ref generator_interior_types,
ref treat_byte_string_as_slice,
ref closure_size_eval,
} = *self;
hcx.with_node_id_hashing_mode(NodeIdHashingMode::HashDefPath, |hcx| {
@@ -780,6 +787,7 @@ impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for TypeckResults<'tcx> {
closure_fake_reads.hash_stable(hcx, hasher);
generator_interior_types.hash_stable(hcx, hasher);
treat_byte_string_as_slice.hash_stable(hcx, hasher);
closure_size_eval.hash_stable(hcx, hasher);
})
}
}