Port `#[rustc_layout_scalar_valid_range_start/end]` to the new attrib… #142921

JonathanBrouwer · 2025-06-23T18:01:15Z

Ports rustc_layout_scalar_valid_range_start and rustc_layout_scalar_valid_range_end to the new attribute parsing infrastructure for #131229 (comment)

r? @jdonszelmann

rustbot · 2025-06-23T18:01:20Z

jdonszelmann is currently at their maximum review capacity.
They may take a while to respond.

rustbot · 2025-06-23T18:01:22Z

Some changes occurred in compiler/rustc_attr_data_structures

cc @jdonszelmann

Changes to the size of AST and/or HIR nodes.

cc @nnethercote

Some changes occurred in compiler/rustc_attr_parsing

cc @jdonszelmann

Some changes occurred in compiler/rustc_passes/src/check_attr.rs

cc @jdonszelmann

tests/ui/stats/input-stats.stderr

JonathanBrouwer · 2025-06-23T18:07:49Z

tests/ui/parser/bad-lit-suffixes.rs

@@ -41,4 +41,5 @@ extern "C" {}

 #[rustc_layout_scalar_valid_range_start(0suffix)]
 //~^ ERROR invalid suffix `suffix` for number literal
+//~| ERROR malformed `rustc_layout_scalar_valid_range_start` attribute input


I don't really like this change, but not sure how to fix it. I think my new lint is the one which should not be triggered, but I just get an attribute with an empty list with no way to detect that it is empty because something previously errored. @jdonszelmann advice?

I'm not 100% sure about this but this might be what dcx.has_stashed_diagnostic(span, StashKey) could be useful for

As a hack I printed the entire stashed_diagnostics when parse_rustc_layout_scalar_valid_range is called and it is empty, so this does not seem to be the solution

src/librustdoc/clean/types.rs

…t, r=jdonszelmann Fix comment on NoMangle Fix comment on NoMangle. This was discussed in comments of rust-lang#142823 (comment) and rust-lang#142921

aDotInTheVoid · 2025-06-23T21:35:26Z

@bors2 try @rust-timer queue

rust-bors · 2025-06-23T21:35:29Z

⌛ Trying commit 49398cf with merge 600a41a…

To cancel the try build, run the command @bors2 try cancel.

Port `#[rustc_layout_scalar_valid_range_start/end]` to the new attrib… Ports `rustc_layout_scalar_valid_range_start` and `rustc_layout_scalar_valid_range_end` to the new attribute parsing infrastructure for #131229 (comment) r? `@jdonszelmann`

rust-bors · 2025-06-24T00:05:49Z

☀️ Try build successful (CI)
Build commit: 600a41a (600a41ac6ff1ea3a01ebd1fc0715b567826018f6, parent: 706f244db581212cabf2e619e0113d70999b2bbe)

Rollup merge of #142922 - JonathanBrouwer:fix-rustdoc-comment, r=jdonszelmann Fix comment on NoMangle Fix comment on NoMangle. This was discussed in comments of #142823 (comment) and #142921

rust-timer · 2025-06-24T07:56:51Z

Finished benchmarking commit (600a41a): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please do so in sufficient writing along with @rustbot label: +perf-regression-triaged. If not, please fix the regressions and do another perf run. If its results are neutral or positive, the label will be automatically removed.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	1.7%	[0.3%, 3.0%]	2
Regressions ❌ (secondary)	0.2%	[0.1%, 0.5%]	4
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.4%	[-0.4%, -0.4%]	1
All ❌✅ (primary)	1.7%	[0.3%, 3.0%]	2

Max RSS (memory usage)

Results (primary 1.5%, secondary 0.6%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	1.5%	[1.3%, 1.8%]	2
Regressions ❌ (secondary)	4.0%	[2.7%, 5.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.7%	[-2.8%, -2.6%]	2
All ❌✅ (primary)	1.5%	[1.3%, 1.8%]	2

Cycles

Results (primary 0.7%, secondary -2.4%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	2.7%	[2.7%, 2.7%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.4%	[-1.4%, -1.4%]	1
Improvements ✅ (secondary)	-2.4%	[-2.8%, -1.5%]	5
All ❌✅ (primary)	0.7%	[-1.4%, 2.7%]	2

Binary size

Results (primary 1.1%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	1.1%	[1.1%, 1.1%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	1.1%	[1.1%, 1.1%]	1

Bootstrap: 688.989s -> 689.147s (0.02%)
Artifact size: 371.96 MiB -> 372.00 MiB (0.01%)

JonathanBrouwer · 2025-06-24T08:33:50Z

^ I've boxed the u128, since there seems to be a performance regression.
Let's see if I have permission to undo the changes made by rust-timer
@bors rollup=always (since it should no longer be perf-sensitive)
@rustbot label: -perf-regression

bors · 2025-06-24T08:33:54Z

@JonathanBrouwer: 🔑 Insufficient privileges: not in try users

jdonszelmann · 2025-06-24T12:00:38Z

No let's not rollup always, still want to see the final results

bors · 2025-06-24T14:42:38Z

☔ The latest upstream changes (presumably #142956) made this pull request unmergeable. Please resolve the merge conflicts.

jdonszelmann · 2025-06-24T22:27:56Z

@rustbot author

rustbot · 2025-06-24T22:28:00Z

Reminder, once the PR becomes ready for a review, use @rustbot ready.

…ute parsing infrastructure Signed-off-by: Jonathan Brouwer <[email protected]>

JonathanBrouwer · 2025-06-25T07:45:14Z

^ Rebased & replied to your comment
@rustbot ready

rustbot assigned jdonszelmann Jun 23, 2025

JonathanBrouwer force-pushed the rustc_attributes_parser branch from 46ea3f1 to 9102b14 Compare June 23, 2025 18:02

JonathanBrouwer commented Jun 23, 2025

View reviewed changes

aDotInTheVoid reviewed Jun 23, 2025

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src/librustdoc/clean/types.rs Outdated Show resolved Hide resolved

JonathanBrouwer force-pushed the rustc_attributes_parser branch from 9102b14 to 49398cf Compare June 23, 2025 18:23

JonathanBrouwer mentioned this pull request Jun 23, 2025

Fix comment on NoMangle #142922

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rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jun 23, 2025

jdonszelmann mentioned this pull request Jun 23, 2025

Tracking issue: Attribute refactor #131229

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rustbot added perf-regression Performance regression. and removed S-waiting-on-perf Status: Waiting on a perf run to be completed. labels Jun 24, 2025

JonathanBrouwer force-pushed the rustc_attributes_parser branch from 49398cf to 37abd08 Compare June 24, 2025 08:33

rustbot removed the perf-regression Performance regression. label Jun 24, 2025

JonathanBrouwer force-pushed the rustc_attributes_parser branch from 37abd08 to e6396e3 Compare June 24, 2025 15:12

rustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 24, 2025

Port #[rustc_layout_scalar_valid_range_start/end] to the new attrib…

d5586dc

…ute parsing infrastructure Signed-off-by: Jonathan Brouwer <[email protected]>

JonathanBrouwer force-pushed the rustc_attributes_parser branch from e6396e3 to d5586dc Compare June 25, 2025 07:44

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Jun 25, 2025

Port #[rustc_layout_scalar_valid_range_start/end] to the new attrib… #142921

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Port #[rustc_layout_scalar_valid_range_start/end] to the new attrib… #142921

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rust-timer commented Jun 24, 2025

Overall result: ❌✅ regressions and improvements - please read the text below

Instruction count

Max RSS (memory usage)

Cycles

Binary size

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Port `#[rustc_layout_scalar_valid_range_start/end]` to the new attrib… #142921

Port `#[rustc_layout_scalar_valid_range_start/end]` to the new attrib… #142921

JonathanBrouwer commented Jun 24, 2025 •

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