Early abort for unused braces check in closure bodies

[oli-obk]

Try to get perf back from #136906 (comment) by doing the cheap checks first

r? @Kobzol

[rustbot]

Kobzol is not on the review rotation at the moment.
They may take a while to respond.

[oli-obk]

@bors try @rust-timer queue

[bors]

⌛ Trying commit f7ab51a with merge a7d246f...

[bors]

☀️ Try build successful - checks-actions
Build commit: a7d246f (a7d246fe5b8ead6f4cae383a2b16f236627aa8e3)

[rust-timer]

Finished benchmarking commit (a7d246f): comparison URL.

Overall result: no relevant changes - no action needed

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.

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

Instruction count

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

Max RSS (memory usage)

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

Cycles

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

Binary size

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

Bootstrap: 466.648s -> 466.731s (0.02%)
Artifact size: 374.71 MiB -> 374.73 MiB (0.01%)