Commit Graph

9 Commits

Author SHA1 Message Date
Sam McCall a5ce243fa3 [clangd] Use fuzzy match to select top N index results.
Summary:
This makes performance slower but more predictable (it always processes
every symbol). We need to find ways to make this fast, possibly by precomputing
short queries or capping the number of scored results. But our current approach
is too naive.

It also no longer returns results in a "good" order. In fact it's pathological:
the top N results are ranked from worst to best. Indexes aren't responsible for
ranking and MergedIndex can't do a good job, so I'm pleased that this will make
any hidden assumptions we have more noticeable :-)

Reviewers: hokein

Subscribers: klimek, ilya-biryukov, cfe-commits

Differential Revision: https://reviews.llvm.org/D42060

llvm-svn: 322821
2018-01-18 08:35:04 +00:00
Sam McCall 0faecf0c33 [clangd] Merge results from static/dynamic index.
Summary:
We now hide the static/dynamic split from the code completion, behind a
new implementation of the SymbolIndex interface. This will reduce the
complexity of the sema/index merging that needs to be done by
CodeComplete, at a fairly small cost in flexibility.

Reviewers: hokein

Subscribers: klimek, mgorny, ilya-biryukov, cfe-commits

Differential Revision: https://reviews.llvm.org/D42049

llvm-svn: 322480
2018-01-15 12:33:00 +00:00
Sam McCall 4b9bbb378b [clangd] Use Builder for symbol slabs, and use sorted-vector for storage
Summary:
This improves a few things:
 - the insert -> freeze -> read sequence is now enforced/communicated by the
   type system
 - SymbolSlab::const_iterator iterates over symbols, not over id-symbol pairs
 - we avoid permanently storing a second copy of the IDs, and the
   string map's hashtable

The slab size is now down to 21.8MB for the LLVM project.
Of this only 2.7MB is strings, the rest is #symbols * `sizeof(Symbol)`.
`sizeof(Symbol)` is currently 96, which seems too big - I think
SymbolInfo isn't efficiently packed. That's a topic for another patch!

Also added simple API to see the memory usage/#symbols of a slab, since
it seems likely we will continue to care about this.

Reviewers: ilya-biryukov

Subscribers: klimek, mgrang, cfe-commits

Differential Revision: https://reviews.llvm.org/D41506

llvm-svn: 321412
2017-12-23 19:38:03 +00:00
Sam McCall 6c0d0f5775 [clangd] Index symbols share storage within a slab.
Summary:
Symbols are not self-contained - it's only safe to hand them out if you
guarantee the lifetime of the underlying data.

Before this lands, I'm going to measure the before/after memory usage of the
LLVM index loaded into memory in a single slab.

Reviewers: hokein

Subscribers: klimek, ilya-biryukov, cfe-commits

Differential Revision: https://reviews.llvm.org/D41483

llvm-svn: 321272
2017-12-21 14:58:44 +00:00
Eric Liu 125cda7d3b [clangd] Igore cases in index fuzzy find.
llvm-svn: 321157
2017-12-20 09:29:54 +00:00
Eric Liu 6f648df1b9 [clangd] Index-based code completion.
Summary: Use symbol index to populate completion results for qualfified IDs e.g. "nx::A^".

Reviewers: ilya-biryukov, sammccall

Reviewed By: ilya-biryukov, sammccall

Subscribers: rwols, klimek, mgorny, cfe-commits, sammccall

Differential Revision: https://reviews.llvm.org/D41281

llvm-svn: 321083
2017-12-19 16:50:37 +00:00
Eric Liu 4feda80a43 [clangd] Support filtering by fixing scopes in fuzzyFind.
Summary: When scopes are specified, only match symbols from scopes.

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: klimek, ilya-biryukov, cfe-commits

Differential Revision: https://reviews.llvm.org/D41367

llvm-svn: 321067
2017-12-19 11:37:40 +00:00
Eric Liu a2d4607a4b [clangd] Fix a potential use-after-move bug.
llvm-svn: 320695
2017-12-14 12:31:04 +00:00
Eric Liu 3732cadc73 [clangd] Symbol index interfaces and an in-memory index implementation.
Summary:
o Index interfaces to support using different index sources (e.g. AST index, global index) for code completion, cross-reference finding etc. This patch focuses on code completion.

The following changes in the original patch has been split out.
o Implement an AST-based index.
o Add an option to replace sema code completion for qualified-id with index-based completion.
o Implement an initial naive code completion index which matches symbols that have the query string as substring.

Reviewers: malaperle, sammccall

Reviewed By: sammccall

Subscribers: hokein, klimek, malaperle, mgorny, ilya-biryukov, cfe-commits

Differential Revision: https://reviews.llvm.org/D40548

llvm-svn: 320688
2017-12-14 11:25:49 +00:00