binaryen-loader passes

loader options.js

          {
            loader: 'binaryen-loader',
            options: {
              optimization: {
                level: 2,
                shrinkLevel: 2
              },
              transformation: {
                // https://github.com/WebAssembly/binaryen/blob/master/src/passes/pass.cpp#L67-L126
                passes: [
                  // 'coalesce-locals', // don't use if coalesce-locals-learning is set
                  'coalesce-locals-learning',
                  // 'code-pushing',
                  // 'const-hoisting',
                  'code-folding',
                  'dce',
                  'duplicate-function-elimination',
                  // 'extract-function', // cause error
                  // 'flatten', // increase size
                  // 'fpcast-emu',
                  // 'func-metrics', // debug
                  // 'inlining', // don't use if inlining-optimizing is set
                  'inlining-optimizing',
                  // 'legalize-js-interface',
                  // 'local-cse',
                  // 'log-execution', // debug
                  // 'i64-to-i32-lowering',
                  // 'instrument-locals', // removing to much (TODO: need to be inspected)
                  // 'instrument-memory', // increase size
                  // 'memory-packing',
                  // 'merge-blocks', // increase size
                  // 'merge-locals', // increase size
                  // 'metrics', // debug
                  // 'nm', // debug
                  // 'optimize-instructions',
                  // 'pick-load-signs',
                  'post-emscripten',
                  // 'precompute',
                  // 'precompute-propagate',
                  //#region debug
                  // 'print',
                  // 'print-minified',
                  // 'print-full',
                  // 'print-call-graph',
                  //#endregion
                  // 'relooper-jump-threading',
                  // 'remove-non-js-ops', // not found
                  'remove-imports',
                  'remove-memory',
                  'remove-unused-brs',
                  'remove-unused-module-elements',
                  'remove-unused-nonfunction-module-elements',
                  'remove-unused-names',
                  // 'reorder-functions',
                  // 'reorder-locals',
                  // 'rereloop', // decrease size but cause unreachable (TODO: need to be inspected)
                  // 'rse',
                  // 'safe-heap', // increase size
                  // 'simplify-locals',
                  // 'simplify-locals-nonesting',
                  // 'simplify-locals-notee',
                  // 'simplify-locals-nostructure',
                  // 'simplify-locals-notee-nostructure',
                  // 'spill-pointers', // failed to find the stack pointer
                  // 'ssa',
                  // 'trap-mode-clamp',
                  // 'trap-mode-js',
                  // 'untee',
                  'vacuum'
                ]
              },
              debug: false
            }
          },