Function addLoadSetTestFunction

deps/v8/test/mjsunit/wasm/wasm-interpreter.js:861–901

(builder, name, copyFromReg)

  const new_value = 42;

  let addLoadSetTestFunction = function (builder, name, copyFromReg) {
    builder.addFunction(name, kSig_v_v)
      .addLocals(kWasmI32, 1)
      .addBody([
        // Create a shared slot.
        ...wasmI32Const(old_value),
        kExprLocalSet, 0,
        kExprLocalGet, 0,

        // Write a new value to memory
        ...wasmI32Const(memory_offset),
        ...wasmI32Const(new_value),
        kExprI32StoreMem, 0, 0,

        // Super-instruction: Load+Set.
        ...wasmI32Const(memory_offset)]
        .concat(copyFromReg ? [
          ...wasmI32Const(0),
          kExprI32Add
        ] : [])
        .concat([
          kExprI32LoadMem, 0, 0,
          kExprLocalSet, 0,

          // Verify that the set slot contains the new value and that the shared
          // slot contains the old value.
          ...wasmI32Const(old_value),
          kExprI32Ne,
          kExprIf, kWasmVoid,
            kExprUnreachable,
          kExprEnd,

          kExprLocalGet, 0,
          ...wasmI32Const(new_value),
          kExprI32Ne,
          kExprIf, kWasmVoid,
            kExprUnreachable,
          kExprEnd
        ]))
      .exportAs(name);
  }

  var builder = new WasmModuleBuilder();
  builder.addMemory(1, 1, false);