Introduce new TaskDepsRef enum to track allow/ignore/forbid status

[Aaron1011]

No description provided.

[rust-highfive]

r? @jackh726

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[Aaron1011]

r? @cjgillot

[cjgillot]

@bors try @rust-timer queue

[rust-timer]

Awaiting bors try build completion.

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

[bors]

⌛ Trying commit f64cd87 with merge f859e551c810093130909a29fc1064952b09ecbc...

[bors]

☀️ Try build successful - checks-actions
Build commit: f859e551c810093130909a29fc1064952b09ecbc (f859e551c810093130909a29fc1064952b09ecbc)

[rust-timer]

Queued f859e551c810093130909a29fc1064952b09ecbc with parent 02fe61b, future comparison URL.

[rust-timer]

Finished benchmarking commit (f859e551c810093130909a29fc1064952b09ecbc): comparison url.

Summary: This change led to moderate relevant improvements 🎉 in compiler performance.

• Moderate improvement in instruction counts (up to -1.4% on incr-unchanged builds of externs)

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

[cjgillot]

@bors r+

[bors]

📌 Commit f64cd87 has been approved by cjgillot

[michaelwoerister]

I didn't expect that to be a performance win 😃

[bors]

⌛ Testing commit f64cd87 with merge 02c9e73...

[bors]

☀️ Test successful - checks-actions
Approved by: cjgillot
Pushing 02c9e73 to master...

[rust-timer]

Finished benchmarking commit (02c9e73): comparison url.

Summary: This change led to moderate relevant improvements 🎉 in compiler performance.

• Moderate improvement in instruction counts (up to -1.4% on incr-unchanged builds of externs)

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

@rustbot label: -perf-regression