Fix unused_parens issue when cast is followed LT

[chenyukang]

Fixes #117142

The original check only checks a as (i32) < 0, this fix extends it to handle b + a as (i32) < 0.

A better way is maybe we suggest (a as i32) < 0 instead of suppressing the warning, maybe following PR could improve it.

[rustbot]

r? @petrochenkov

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[chenyukang]

@rustbot ready

[petrochenkov]

@bors r+

[bors]

📌 Commit eef4e65 has been approved by petrochenkov

It is now in the queue for this repository.

[bors]

⌛ Testing commit eef4e65 with merge 3071aef...

[bors]

☀️ Test successful - checks-actions
Approved by: petrochenkov
Pushing 3071aef to master...

[rust-timer]

Finished benchmarking commit (3071aef): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

This benchmark run did not return any relevant results for this metric.

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	0.8%	[0.7%, 1.0%]	2
Regressions ❌ (secondary)	2.5%	[2.5%, 2.5%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.8%	[0.7%, 1.0%]	2

Cycles

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	0.5%	[0.5%, 0.5%]	2
Regressions ❌ (secondary)	1.3%	[1.3%, 1.3%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.5%	[0.5%, 0.5%]	2

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 665.459s -> 665.943s (0.07%)
Artifact size: 308.09 MiB -> 308.12 MiB (0.01%)