PPU LLVM upgrade (v4-kusa)

[Nekotekina]

1. Added additional analyser layer which could possibly inflate cache size, but it didn't happen. Please report if you get unusually big executable cache with v4-kusa.
2. Added nounwind attribute to compiled function. It reduced their size significantly.
3. Compiled certain rare functions with "no branch tables" on per-instruction basis.
4. Optimized small blocks with 1-3 instructions, without a terminator: removed state checks for them.
5. Fixed some minor bugs and implemented rare instruction (ADD with overflow check).
6. Removed some silly global variables. Now compiled functions receive 7 parameters, such as mem ptr and some PPU regs.
7. Used GHC calling convention: it allows to pass a lot of arguments and saves no registers.
8. Implemented ppu_escape as very fast equivalent to longjmp, but only works with GHC CC gate.
9. Added unused yet greedy mode flag. It will compile every instruction plus it will allow breakpoints by injecting path buffer into every compiled entity, in order to enable fast breakpoints with PPU LLVM, and also as a last resort compatibility measure.

[Nekotekina]

Was only able to run simple programs, will likely crash on most games. Still investigating.

[Nekotekina]

I think it works now

[Nekotekina]

There is some slow progress.

[AniLeo]

Tested NieR Replicant and MotorStorm, seems to work fine, but needs checking with more games

[raveskirza]

B2S, SCV, Tekken 6 and TTT2 work fine with this PR

[digitaldude555]

Persona 5, Resistance 2 and NCAA 14 working fine.

[Nekotekina]

Not everything that was planned was implemented at once, but there is definitely some progress.
I managed to remove some legacy "variables" and move to GHC calling convention in line with SPU LLVM.
That's probably this for January.

[AniLeo]

Ok, will test this one as is, try to commit new non bugfix changes on a new PR so we can keep track of possible regressions correctly

[Nekotekina]

Just fixed an assertion on compilation.

[AniLeo]

Tested several games, working

• JoJo: All Star Battle
• NieR Replicant
• Persona 5
• Skate 3
• Yakuza 3

[Augusto7743]

The correct way to test is remove all PPU and SPU caches ? RSX shaders also ?

[RainbowCookie32]

No need to remove any. PPU cache version was bumped, so the old one won't be used, SPU and RSX aren't touched here as far as I know

[Augusto7743]

Thanks for your reply.
if old PPU cache wont' be used means that an new one will be created ...
I will test some games (Gran Turismo 5 Prologue, Ridge Racer 7 and others with issues) not removing any caches and after removing all caches.

[jpchow26]

Is this supposed to help with Daytona USA? I still see flickering textures with latest build 11707

[arcadee1977]

This update makes rpcs3 unable to use cheatebootpkg or modified eboot (cheats), which will lead to RPCS3 shutdown :(