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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
This commit is contained in:
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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37
ARMeilleure/Translation/Compiler.cs
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@ -1,4 +1,5 @@
using ARMeilleure.CodeGen;
using ARMeilleure.CodeGen.Optimizations;
using ARMeilleure.CodeGen.X86;
using ARMeilleure.Diagnostics;
using ARMeilleure.IntermediateRepresentation;
@ -13,31 +14,41 @@ namespace ARMeilleure.Translation
OperandType retType,
CompilerOptions options)
{
Logger.StartPass(PassName.Dominance);
CompilerContext cctx = new(cfg, argTypes, retType, options);
if ((options & CompilerOptions.SsaForm) != 0)
if (options.HasFlag(CompilerOptions.Optimize))
{
Dominance.FindDominators(cfg);
Dominance.FindDominanceFrontiers(cfg);
Logger.StartPass(PassName.TailMerge);
TailMerge.RunPass(cctx);
Logger.EndPass(PassName.TailMerge, cfg);
}
Logger.EndPass(PassName.Dominance);
Logger.StartPass(PassName.SsaConstruction);
if ((options & CompilerOptions.SsaForm) != 0)
if (options.HasFlag(CompilerOptions.SsaForm))
{
Logger.StartPass(PassName.Dominance);
Dominance.FindDominators(cfg);
Dominance.FindDominanceFrontiers(cfg);
Logger.EndPass(PassName.Dominance);
Logger.StartPass(PassName.SsaConstruction);
Ssa.Construct(cfg);
Logger.EndPass(PassName.SsaConstruction, cfg);
}
else
{
Logger.StartPass(PassName.RegisterToLocal);
RegisterToLocal.Rename(cfg);
Logger.EndPass(PassName.RegisterToLocal, cfg);
}
Logger.EndPass(PassName.SsaConstruction, cfg);
CompilerContext cctx = new(cfg, argTypes, retType, options);
return CodeGenerator.Generate(cctx);
}
}