Revert "Auto merge of #146186 - dpaoliello:cc, r=jieyouxu"

[jieyouxu]

This reverts #146186. This will mean regressing whichever cc fixes were needed for

fixes when compiling the Rust compiler for Arm64EC.

It's not clear which cc change causes the across-the-board perf regression, I suspect it's a change in how certain compiler flags are handed. But I can immediately tell this is a rabbit hole to investigate, so let's revert for now to return-to-baseline and alleviate time pressure.

[rustbot]

These commits modify the Cargo.lock file. Unintentional changes to Cargo.lock can be introduced when switching branches and rebasing PRs.

If this was unintentional then you should revert the changes before this PR is merged.
Otherwise, you can ignore this comment.

[rustbot]

⚠️ Warning ⚠️

• There are issue links (such as #123) in the commit messages of the following commits.
  Please move them to the PR description, to avoid spamming the issues with references to the commit, and so this bot can automatically canonicalize them to avoid issues with subtree.
  • 2b9b7bb

[jieyouxu]

@bors try @rust-timer queue

[jieyouxu]

@rustbot reroll

[madsmtm]

r? me

Looks good, feel free to r=me once perf finishes.

@bors rollup=never delegate+

⚠️ Warning ⚠️

* There are issue links (such as `#123`) in the commit messages of the following commits. _Please move them to the PR description, to avoid spamming the issues with references to the commit, and so this bot can automatically canonicalize them to avoid issues with subtree._ * [2b9b7bb](https://github.com/rust-lang/rust/commit/2b9b7bb3d4d55a7823e900e031324fcd57da9c92) 

Also note this.

[bors]

✌️ @jieyouxu, you can now approve this pull request!

If @madsmtm told you to "r=me" after making some further change, please make that change, then do @bors r=@madsmtm

[rust-bors]

☀️ Try build successful (CI)
Build commit: 6fe122f (6fe122feddb1c4e81559df84ed0e5f2a2bf962ef, parent: 6906167e01fba6f702f123264653f8e401546731)

[rust-timer]

Finished benchmarking commit (6fe122f): comparison URL.

Overall result: ✅ improvements - 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

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

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.7%	[-3.6%, -0.3%]	258
Improvements ✅ (secondary)	-0.9%	[-2.9%, -0.0%]	286
All ❌✅ (primary)	-0.7%	[-3.6%, -0.3%]	258

Max RSS (memory usage)

Results (primary -3.5%)

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

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-3.5%	[-3.5%, -3.5%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-3.5%	[-3.5%, -3.5%]	1

Cycles

Results (primary -3.2%, secondary -3.2%)

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

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-3.2%	[-4.3%, -2.5%]	3
Improvements ✅ (secondary)	-3.2%	[-3.2%, -3.2%]	1
All ❌✅ (primary)	-3.2%	[-4.3%, -2.5%]	3

Binary size

Results (primary -1.1%, secondary 0.0%)

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

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.0%	[0.0%, 0.0%]	1
Improvements ✅ (primary)	-1.1%	[-1.1%, -1.1%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-1.1%	[-1.1%, -1.1%]	1

Bootstrap: 475.565s -> 473.414s (-0.45%)
Artifact size: 390.38 MiB -> 390.86 MiB (0.12%)

[mati865]

@bors r=@madsmtm

[bors]

📌 Commit 2b9b7bb has been approved by madsmtm

It is now in the queue for this repository.