Update compiler_builtins to 0.1.79

[nicholasbishop]

This pulls in a memcmp fix and some UEFI float-to-int fixes:
rust-lang/compiler-builtins@0.1.78...0.1.79

[rust-highfive]

r? @Mark-Simulacrum

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[Mark-Simulacrum]

@bors r+ rollup=never

[bors]

📌 Commit d1926eb has been approved by Mark-Simulacrum

It is now in the queue for this repository.

[bors]

⌛ Testing commit d1926eb with merge 75b7e52...

[bors]

☀️ Test successful - checks-actions
Approved by: Mark-Simulacrum
Pushing 75b7e52 to master...

[rust-timer]

Finished benchmarking commit (75b7e52): comparison url.

Instruction count

• Primary benchmarks: ✅ relevant improvement found
• Secondary benchmarks: no relevant changes found

	mean1	max	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.0%	-1.0%	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-1.0%	-1.0%	1

Max RSS (memory usage)

Results

• Primary benchmarks: no relevant changes found
• Secondary benchmarks: ❌ relevant regressions found

	mean1	max	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	2.8%	4.0%	3
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Cycles

Results

• Primary benchmarks: ✅ relevant improvement found
• Secondary benchmarks: ❌ relevant regressions found

	mean1	max	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.2%	5.8%	2
Improvements ✅ (primary)	-4.1%	-4.1%	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-4.1%	-4.1%	1

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

@rustbot label: -perf-regression

Footnotes

1. the arithmetic mean of the percent change ↩ ↩² ↩³

2. number of relevant changes ↩ ↩² ↩³