Erase regions within vtable_trait_first_method_offset

[crlf0710]

Fixes #90177 .

r? @jackh726

[jackh726]

@bors try @rust-timer queue

[rust-timer]

Awaiting bors try build completion.

@rustbot label: +S-waiting-on-perf

[bors]

⌛ Trying commit 8841204 with merge f155cf50ec3c87dad1e65b3a9a1a9203b159f7bc...

[bors]

☀️ Try build successful - checks-actions
Build commit: f155cf50ec3c87dad1e65b3a9a1a9203b159f7bc (f155cf50ec3c87dad1e65b3a9a1a9203b159f7bc)

[rust-timer]

Queued f155cf50ec3c87dad1e65b3a9a1a9203b159f7bc with parent 473eaa4, future comparison URL.

[rust-timer]

Finished benchmarking commit (f155cf50ec3c87dad1e65b3a9a1a9203b159f7bc): comparison url.

Summary: This benchmark run did not return any relevant changes.

If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf.

Benchmarking this pull request likely means that it is perf-sensitive, so we're automatically marking it as not fit for rolling up. While you can manually mark this PR as fit for rollup, we strongly recommend not doing so since this PR led to changes in compiler perf.

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

[jackh726]

@bors r+

[bors]

📌 Commit 8841204 has been approved by jackh726

[bors]

⌛ Testing commit 8841204 with merge 2cff30b...

[bors]

☀️ Test successful - checks-actions
Approved by: jackh726
Pushing 2cff30b to master...

[rust-timer]

Finished benchmarking commit (2cff30b): comparison url.

Summary: This benchmark run did not return any relevant changes.

If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf.

@rustbot label: -perf-regression