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Add an early TailMerge pass (#2721)

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* Add an early `TailMerge` pass

Some translations can have a lot of guest calls and since for each guest
call there is a call guard which may return. This can produce a lot of
epilogue code for returns. This pass merges the epilogue into a single
block.

```
Using filter 'hcq'.
Using metric 'code size'.

Total diff: -1648111 (-7.19 %) (bytes):
  Base: 22913847
  Diff: 21265736

Improved: 4567, regressed: 14, unchanged: 144
```

* Set PTC version

* Address feedback

* Handle `void` returning functions

* Actually handle `void` returning functions

* Fix `RegisterToLocal` logging
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FICTURE7 2021-10-19 02:51:22 +04:00 • committed by GitHub
parent d512ce122c
commit fbf40424f4
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7 changed files with 148 additions and 26 deletions
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ARMeilleure/Diagnostics/PassName.cs
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@ -5,8 +5,10 @@ namespace ARMeilleure.Diagnostics
Decoding,
Translation,
RegisterUsage,
TailMerge,
Dominance,
SsaConstruction,
RegisterToLocal,
Optimization,
PreAllocation,
RegisterAllocation,