Fix TLS access mir opt test and remove stale files

[JakobDegen]

Thanks @pietroalbini for noticing that the TLS test was not doing what it was supposed to. Switched to PreCodegen because SimplifyCfg does not run on opt level 0.

Also addresses the easy part of #97564 .

r? rust-lang/mir-opt

[tmiasko]

@bors r+

[bors]

📌 Commit e60d8b6 has been approved by tmiasko

[bors]

⌛ Testing commit e60d8b6 with merge 0595ea1...

[bors]

☀️ Test successful - checks-actions
Approved by: tmiasko
Pushing 0595ea1 to master...

[rust-timer]

Finished benchmarking commit (0595ea1): comparison url.

Instruction count

• Primary benchmarks: no relevant changes found
• Secondary benchmarks: mixed results

	mean1	max	count2
Regressions 😿 (primary)	N/A	N/A	0
Regressions 😿 (secondary)	2.2%	2.2%	1
Improvements 🎉 (primary)	N/A	N/A	0
Improvements 🎉 (secondary)	-1.1%	-1.1%	3
All 😿🎉 (primary)	N/A	N/A	0

Max RSS (memory usage)

Results

• Primary benchmarks: 🎉 relevant improvement found
• Secondary benchmarks: mixed results

	mean1	max	count2
Regressions 😿 (primary)	N/A	N/A	0
Regressions 😿 (secondary)	3.4%	5.1%	2
Improvements 🎉 (primary)	-2.8%	-2.8%	1
Improvements 🎉 (secondary)	-3.3%	-3.3%	1
All 😿🎉 (primary)	-2.8%	-2.8%	1

Cycles

Results

• Primary benchmarks: 😿 relevant regression found
• Secondary benchmarks: 😿 relevant regressions found

	mean1	max	count2
Regressions 😿 (primary)	2.1%	2.1%	1
Regressions 😿 (secondary)	3.8%	4.2%	2
Improvements 🎉 (primary)	N/A	N/A	0
Improvements 🎉 (secondary)	N/A	N/A	0
All 😿🎉 (primary)	2.1%	2.1%	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