Use relative positions inside a SourceFile.

[cjgillot]

This allows to remove the normalization of start positions for hashing, and simplify allocation of global address space.

cc @Zoxc

[rustbot]

r? @oli-obk

(rustbot has picked a reviewer for you, use r? to override)

[rustbot]

Some changes occurred in compiler/rustc_codegen_cranelift

cc @bjorn3

Some changes occurred in src/tools/clippy

cc @rust-lang/clippy

Some changes occurred in src/tools/rustfmt

cc @rust-lang/rustfmt

Some changes occurred to MIR optimizations

cc @rust-lang/wg-mir-opt

[cjgillot]

@bors try @rust-timer queue

[bors]

⌛ Trying commit 9755022997cd6860c94773ae023743160ddb7235 with merge 95fa9e122172b6f0825c4cc4d7d8d46892bed79f...

[bors]

☀️ Try build successful - checks-actions
Build commit: 95fa9e122172b6f0825c4cc4d7d8d46892bed79f (95fa9e122172b6f0825c4cc4d7d8d46892bed79f)

[rust-timer]

Finished benchmarking commit (95fa9e122172b6f0825c4cc4d7d8d46892bed79f): comparison URL.

Overall result: no relevant changes - no action needed

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 may lead to 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

Results

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)	-0.0%	[-0.0%, -0.0%]	1
All ❌✅ (primary)	-	-	0

Bootstrap: 631.425s -> 628.246s (-0.50%)
Artifact size: 316.57 MiB -> 316.61 MiB (0.01%)

[oli-obk]

@bors r-

[oli-obk]

@bors r+

[bors]

📌 Commit 3edeac0 has been approved by oli-obk

It is now in the queue for this repository.

[bors]

⌛ Testing commit 3edeac0 with merge e2603e46b87c285d317802bf8759642b048cdc3f...

[rust-log-analyzer]

A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

[bors]

💔 Test failed - checks-actions

[cjgillot]

@bors retry

[bors]

⌛ Testing commit 3edeac0 with merge a991861...

[bors]

☀️ Test successful - checks-actions
Approved by: oli-obk
Pushing a991861 to master...

[rust-timer]

Finished benchmarking commit (a991861): 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)

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

Results

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)	-0.0%	[-0.0%, -0.0%]	8
Improvements ✅ (secondary)	-0.0%	[-0.0%, -0.0%]	3
All ❌✅ (primary)	-0.0%	[-0.0%, -0.0%]	8

Bootstrap: 627.53s -> 628.337s (0.13%)
Artifact size: 316.30 MiB -> 316.11 MiB (-0.06%)