Asyncify pass does not terminate on a large WASM module while other wasm-opt passes complete

[Rawan10101]

Environment

• Binaryen version: 130
• Emscripten: 6.0.2
• Platform: Ubuntu 22.04 (WSL2)
• Target: wasm32-emscripten

Problem

The Asyncify pass appears to never finish on a generated WASM module. While other wasm-opt passes complete successfully on the exact same module, but --asyncify never terminates or at least does not complete after an extended period while continuously consuming CPU.

Reproduction

The following command completes successfully:

wasm-opt nvim.wasm -O2 -o /tmp/out.wasm

The following command never finishes:

wasm-opt nvim.wasm --asyncify -o /tmp/out.wasm

I also observed the same behavior when invoked through Emscripten during linking with -sASYNCIFY=1.

Additional information

The module characteristics are approximately:

• Binary size: about 344 KB
• Functions: 7943
• Locals: 80012

Output from wasm-opt --metrics:

[exports]      : 55
[funcs]        : 7943
[globals]      : 8
[imports]      : 88
[memories]     : 1
[memory-data]  : 3029640
[tables]       : 1
[vars]         : 80012