Function AssignmentExpression

tools/acorn-optimizer.mjs:1003–1031

(node, c)

      }
    },
    AssignmentExpression(node, c) {
      const target = node.left;
      const value = node.right;
      c(value);
      const heap = isHEAPAccess(target);
      const growHeap = isGrowHEAPAccess(target);
      if (heap) {
        // replace the heap access with LE_HEAP_STORE
        const idx = target.property;
        const helper = littleEndianHelper[heap];
        if (helper) {
          // "nameXX[idx] = value" -> "LE_HEAP_STORE_XX(idx*XX, value)"
          makeCallExpression(node, helper.store, [multiply(idx, helper.width), value]);
        }
      } else if (growHeap) {
        const idx = target.property;
        const helper = littleEndianHelper[growHeap];
        if (helper) {
          // "(growMemViews(),nameXX)[idx] = value" -> "LE_HEAP_STORE_XX((growMemViews(),idx*XX), value)"
          makeCallExpression(node, helper.store, [
            makeSequence(makeCallGrowMemViews(), multiply(idx, helper.width)),
            value,
          ]);
        }
      } else {
        // not accessing the HEAP
        c(target);
      }
    },
    CallExpression(node, c) {
      if (node.arguments) {
        for (var a of node.arguments) c(a);