Tolerate overaligned MIR constants for codegen.

[cjgillot]

Fixes #117761

cc @saethlin

[rustbot]

r? @wesleywiser

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

[wesleywiser]

@bors r+

[bors]

📌 Commit 503af0d has been approved by wesleywiser

It is now in the queue for this repository.

[bors]

⌛ Testing commit 503af0d with merge 920e005...

[bors]

☀️ Test successful - checks-actions
Approved by: wesleywiser
Pushing 920e005 to master...

[rust-timer]

Finished benchmarking commit (920e005): comparison URL.

Overall result: ❌✅ regressions and improvements - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	1.2%	[1.2%, 1.2%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.2%	[-0.2%, -0.2%]	2
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

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)	4.3%	[4.3%, 4.3%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Cycles

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)	2.9%	[2.9%, 2.9%]	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: 673.469s -> 673.95s (0.07%)
Artifact size: 312.82 MiB -> 312.81 MiB (-0.00%)