bootstrap: flip compile::Rustc vs compile::Assemble

[jieyouxu]

The PathSet prefix matching unfortunately also has implications for ./x build compiler --stage 0, because the path filter "compiler" gets consumed by compile::Rustc step first after PathSet prefix matching, whereas before PathSet prefix matching, compile::Rustc would not have consumed "compiler".

This merely papers over #134970 to unblock contributors from using ./x build compiler --stage 0.

The PathSet prefix matching behavior is tracked in #135022.

Closes #134970.

[rustbot]

r? @Mark-Simulacrum

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[jieyouxu]

r? @onur-ozkan (you likely have more context)

[jieyouxu]

Tested manually by deleting a load-bearing method in rustc_abi and seeing that the compiler indeed does not build, unlike on master currently.

[onur-ozkan]

feel free to r=me

[jieyouxu]

This wouldn't be observable in CI anyway, so
@bors r=@onur-ozkan rollup

[bors]

📌 Commit 552c1f5 has been approved by onur-ozkan

It is now in the queue for this repository.

[jieyouxu]

@bors p=1 (contributor roadblock, but feel free to include this in a rollup if someone is making one)

[bors]

⌛ Testing commit 552c1f5 with merge 6ca6659...

[bors]

☀️ Test successful - checks-actions
Approved by: onur-ozkan
Pushing 6ca6659 to master...

[rust-timer]

Finished benchmarking commit (6ca6659): 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 (secondary -1.8%)

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
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-1.8%	[-1.8%, -1.8%]	1
All ❌✅ (primary)	-	-	0

Cycles

Results (secondary 2.1%)

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
Regressions ❌ (secondary)	2.1%	[2.1%, 2.1%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Binary size

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

Bootstrap: 763.526s -> 763.315s (-0.03%)
Artifact size: 325.58 MiB -> 325.45 MiB (-0.04%)