[perf] Measure Destination Propagation performance - #72635

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jonas-schievink wants to merge 15 commits into

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jonas-schievink:dest-prop-perf

Commits on Jun 24, 2020

Implement a destination propagation pass
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19cd910
simplify_try: print dest_prop diff and bless
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2080a93
simplify_try: clean up test
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0d017cc
Make nrvo-simple set mir-opt-level=1
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4239d74
Bless mir-opt tests
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8f77e36
Add a few dest-prop MIR tests
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fbcf758
perf: walk liveness backwards in Conflicts::build
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fef2597
perf: only calculate conflicts for candidates
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093b248
perf: bail out when there's >500 candidate locals
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8575026
Record intra-statement/terminator conflicts
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d6fe24c
More logging
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b7c44d3
Properly inherit conflicts when merging locals
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97d49ef
Fix rebase fallout
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731dbe3
Limit block count
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b760023
[perf] run destination propagation by default
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d36b287