$ emcc -W small.c -o small.js; node small.js 5 $ wasm-opt small.wasm --spill-pointers -o small.wasm; node small.js 0 $ cat small.c #include "stdio.h" int a = 5; int main() { printf("%d\n", a); }

$ emcc -v emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.30 (cfe2bdfe2692457cb5f5770672f6e5ccb3ffc2f2) clang version 16.0.0 (https://github.com/llvm/llvm-project 800f0f1546b2352ba42a4777149afb13cb874fcd) Target: wasm32-unknown-emscripten Thread model: posix InstalledDir: /home/emsdk/upstream/bin $ wasm-opt --version wasm-opt version 111 (version_111-98-ga803a0830)