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ast: Compress AttrId from usize to u32 - #70215

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rust-lang:masterfrom
petrochenkov:attrid
Mar 22, 2020
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ast: Compress AttrId from usize to u32#70215
bors merged 1 commit into
rust-lang:masterfrom
petrochenkov:attrid

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@petrochenkov

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An easy size win for ast::Attribute (96 bytes -> 88 bytes).

Also stop encoding/decoding AttrId entirely.

Also stop encoding/decoding it entirely
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r? @cramertj

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@rust-highfiverust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Mar 21, 2020
@Centril

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r? @Centril@bors r+

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bors commented Mar 21, 2020

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📌 Commit 13dd9af has been approved by Centril

@borsbors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 21, 2020
bors added a commit to rust-lang-ci/rust that referenced this pull request Mar 21, 2020
Rollup of 10 pull requests
Successful merges:
- rust-lang#70003 (symbol_names: treat ReifyShim like VtableShim.)
- rust-lang#70051 (Allow `hir().find` to return `None`)
- rust-lang#70126 (Fix ICE caused by truncating a negative ZST enum discriminant)
- rust-lang#70197 (For issue 53957: revise unit test to focus on underlying bug of 23076.)
- rust-lang#70215 (ast: Compress `AttrId` from `usize` to `u32`)
- rust-lang#70218 (Fix deprecated Error.description() usage in docs)
- rust-lang#70228 (Remove CARGO_BUILD_TARGET from bootstrap.py)
- rust-lang#70231 (Add explanation message for E0224)
- rust-lang#70232 (Tweak wording for std::io::Read::read function)
- rust-lang#70238 (Add a test for out-of-line module passed through a proc macro)
Failed merges:
r? @ghost
@bors
bors merged commit 8e90533 into rust-lang:masterMar 22, 2020
@RalfJung

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Should we have an static_assert_size! somewhere to make sure this does not regress?

@petrochenkov

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I don't know.
The motivation was more like "why not, all other indices use newtype_index already", rather than "I profiled it and it was an improvement".

@ehussehuss mentioned this pull request Apr 13, 2020
Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request Apr 20, 2020
fix -Zast-json to output correct JSON form
fixesrust-lang#71086 (Reverts some of the changes made in rust-lang#70215)
JSON output (from an empty library) after fix has something for **"id"** field
```shell
lonelyjoe@lonelyjoe-desktop:~/workspace/empty_lib/src$ rustc lib.rs -Zast-json
```
```json
{
"module":{
"inner":{
"lo":0,
"hi":94
},
"items":[
{
"attrs":[
{
"kind":{
"variant":"Normal",
"fields":[
{
"path":{
"span":{
"lo":0,
"hi":0
},
"segments":[
{
"ident":{
"name":"prelude_import",
"span":{
"lo":0,
"hi":0
}
},
"id":3,
"args":null
}
]
},
"args":"Empty"
}
]
},
"id":null,
"style":"Outer",
"span":{
"lo":0,
"hi":0
}
}
],
"id":4,
"span":{
"lo":0,
"hi":0
},
"vis":{
"node":"Inherited",
"span":{
"lo":0,
"hi":0
}
},
"ident":{
"name":"",
"span":{
"lo":0,
"hi":0
}
},
"kind":{
"variant":"Use",
"fields":[
{
"prefix":{
"span":{
"lo":0,
"hi":0
},
"segments":[
{
"ident":{
"name":"{{root}}",
"span":{
"lo":0,
"hi":0
}
},
"id":5,
"args":null
},
{
"ident":{
"name":"std",
"span":{
"lo":0,
"hi":0
}
},
"id":6,
"args":null
},
{
"ident":{
"name":"prelude",
"span":{
"lo":0,
"hi":0
}
},
"id":7,
"args":null
},
{
"ident":{
"name":"v1",
"span":{
"lo":0,
"hi":0
}
},
"id":8,
"args":null
}
]
},
"kind":"Glob",
"span":{
"lo":0,
"hi":0
}
}
]
},
"tokens":null
},
{
"attrs":[
{
"kind":{
"variant":"Normal",
"fields":[
{
"path":{
"span":{
"lo":0,
"hi":0
},
"segments":[
{
"ident":{
"name":"macro_use",
"span":{
"lo":0,
"hi":0
}
},
"id":9,
"args":null
}
]
},
"args":"Empty"
}
]
},
"id":null,
"style":"Outer",
"span":{
"lo":0,
"hi":0
}
}
],
"id":10,
"span":{
"lo":0,
"hi":0
},
"vis":{
"node":"Inherited",
"span":{
"lo":0,
"hi":0
}
},
"ident":{
"name":"std",
"span":{
"lo":0,
"hi":0
}
},
"kind":{
"variant":"ExternCrate",
"fields":[
null
]
},
"tokens":null
}
],
"inline":true
},
"attrs":[
],
"span":{
"lo":0,
"hi":94
},
"proc_macros":[
]
}
```
Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request Apr 20, 2020
fix -Zast-json to output correct JSON form
fixesrust-lang#71086 (Reverts some of the changes made in rust-lang#70215)
JSON output (from an empty library) after fix has something for **"id"** field
```shell
lonelyjoe@lonelyjoe-desktop:~/workspace/empty_lib/src$ rustc lib.rs -Zast-json
```
```json
{
"module":{
"inner":{
"lo":0,
"hi":94
},
"items":[
{
"attrs":[
{
"kind":{
"variant":"Normal",
"fields":[
{
"path":{
"span":{
"lo":0,
"hi":0
},
"segments":[
{
"ident":{
"name":"prelude_import",
"span":{
"lo":0,
"hi":0
}
},
"id":3,
"args":null
}
]
},
"args":"Empty"
}
]
},
"id":null,
"style":"Outer",
"span":{
"lo":0,
"hi":0
}
}
],
"id":4,
"span":{
"lo":0,
"hi":0
},
"vis":{
"node":"Inherited",
"span":{
"lo":0,
"hi":0
}
},
"ident":{
"name":"",
"span":{
"lo":0,
"hi":0
}
},
"kind":{
"variant":"Use",
"fields":[
{
"prefix":{
"span":{
"lo":0,
"hi":0
},
"segments":[
{
"ident":{
"name":"{{root}}",
"span":{
"lo":0,
"hi":0
}
},
"id":5,
"args":null
},
{
"ident":{
"name":"std",
"span":{
"lo":0,
"hi":0
}
},
"id":6,
"args":null
},
{
"ident":{
"name":"prelude",
"span":{
"lo":0,
"hi":0
}
},
"id":7,
"args":null
},
{
"ident":{
"name":"v1",
"span":{
"lo":0,
"hi":0
}
},
"id":8,
"args":null
}
]
},
"kind":"Glob",
"span":{
"lo":0,
"hi":0
}
}
]
},
"tokens":null
},
{
"attrs":[
{
"kind":{
"variant":"Normal",
"fields":[
{
"path":{
"span":{
"lo":0,
"hi":0
},
"segments":[
{
"ident":{
"name":"macro_use",
"span":{
"lo":0,
"hi":0
}
},
"id":9,
"args":null
}
]
},
"args":"Empty"
}
]
},
"id":null,
"style":"Outer",
"span":{
"lo":0,
"hi":0
}
}
],
"id":10,
"span":{
"lo":0,
"hi":0
},
"vis":{
"node":"Inherited",
"span":{
"lo":0,
"hi":0
}
},
"ident":{
"name":"std",
"span":{
"lo":0,
"hi":0
}
},
"kind":{
"variant":"ExternCrate",
"fields":[
null
]
},
"tokens":null
}
],
"inline":true
},
"attrs":[
],
"span":{
"lo":0,
"hi":94
},
"proc_macros":[
]
}
```
Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request Apr 20, 2020
fix -Zast-json to output correct JSON form
fixesrust-lang#71086 (Reverts some of the changes made in rust-lang#70215)
JSON output (from an empty library) after fix has something for **"id"** field
```shell
lonelyjoe@lonelyjoe-desktop:~/workspace/empty_lib/src$ rustc lib.rs -Zast-json
```
```json
{
"module":{
"inner":{
"lo":0,
"hi":94
},
"items":[
{
"attrs":[
{
"kind":{
"variant":"Normal",
"fields":[
{
"path":{
"span":{
"lo":0,
"hi":0
},
"segments":[
{
"ident":{
"name":"prelude_import",
"span":{
"lo":0,
"hi":0
}
},
"id":3,
"args":null
}
]
},
"args":"Empty"
}
]
},
"id":null,
"style":"Outer",
"span":{
"lo":0,
"hi":0
}
}
],
"id":4,
"span":{
"lo":0,
"hi":0
},
"vis":{
"node":"Inherited",
"span":{
"lo":0,
"hi":0
}
},
"ident":{
"name":"",
"span":{
"lo":0,
"hi":0
}
},
"kind":{
"variant":"Use",
"fields":[
{
"prefix":{
"span":{
"lo":0,
"hi":0
},
"segments":[
{
"ident":{
"name":"{{root}}",
"span":{
"lo":0,
"hi":0
}
},
"id":5,
"args":null
},
{
"ident":{
"name":"std",
"span":{
"lo":0,
"hi":0
}
},
"id":6,
"args":null
},
{
"ident":{
"name":"prelude",
"span":{
"lo":0,
"hi":0
}
},
"id":7,
"args":null
},
{
"ident":{
"name":"v1",
"span":{
"lo":0,
"hi":0
}
},
"id":8,
"args":null
}
]
},
"kind":"Glob",
"span":{
"lo":0,
"hi":0
}
}
]
},
"tokens":null
},
{
"attrs":[
{
"kind":{
"variant":"Normal",
"fields":[
{
"path":{
"span":{
"lo":0,
"hi":0
},
"segments":[
{
"ident":{
"name":"macro_use",
"span":{
"lo":0,
"hi":0
}
},
"id":9,
"args":null
}
]
},
"args":"Empty"
}
]
},
"id":null,
"style":"Outer",
"span":{
"lo":0,
"hi":0
}
}
],
"id":10,
"span":{
"lo":0,
"hi":0
},
"vis":{
"node":"Inherited",
"span":{
"lo":0,
"hi":0
}
},
"ident":{
"name":"std",
"span":{
"lo":0,
"hi":0
}
},
"kind":{
"variant":"ExternCrate",
"fields":[
null
]
},
"tokens":null
}
],
"inline":true
},
"attrs":[
],
"span":{
"lo":0,
"hi":94
},
"proc_macros":[
]
}
```
@petrochenkov
petrochenkov deleted the attrid branch February 22, 2025 18:45
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@petrochenkov@rust-highfive@Centril@bors@RalfJung@cramertj