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VectorizeSIMD Java flag breaks villager/passive mob rendering

brucethemoose opened this issue ยท 1 comments

commented

What happened?

Villagers and passive mobs will turn invisible after some time (usually less than a minute), but only if the VectorizeSIMD flag is enabled.

Steps to reproduce the issue

  • Download the latest GraalVM EE Java 17 release. Its free, but requires registration here https://www.oracle.com/downloads/graalvm-downloads.html

  • Edit your settings to launch the game with GraalVM EE, with the following flags: -Dgraal.VectorizeSIMD=true -Dgraal.UsePriorityInlining=false

  • Launch Minecraft 1.18.2 or 1.19.x with sodium, fabric, and iris, using GraalVM EE 17

  • Create a peaceful, superflat, singleplayer world

  • Find a village. After some time (usually less than a minute), villagers and passive mobs will turn invisible.

  • This will not happen when Dgraal.VectorizeSIMD is set to false.

It doesn't seem to matter if shaders are even enabled or not, it happens either way. It does not happen with Sodium by itself, and it doesn't happen in any other Java distribution, including GraalVM CE.

Screenshots

Shaders are completely disabled in the top screenshot, and enabled (Complimentary V4) in the bottom.
Screenshot (9)
Screenshot (10)

Log output

https://mclo.gs/vNdU1Ls

Minecraft Version

1.19.1 and 1.18.2

Iris Version

1.2.6

Operating System

Windows 10 21H2

What is your GPU?

Nvidia Geforce RTX 2060

Additional context

Also documented on Oracle's Github page: oracle/graal#4775

Unlike my closed sodium issue, I have confirmed this does not happen in vanilla, or with just sodium + fabric.

commented

Closing this for now, as I managed to trigger it without Iris (and just Sodium).