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// Copyright 2014 The Emscripten Authors. All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License. Both these licenses can be
// found in the LICENSE file.
#include <stdio.h>
#define ALIGN(num_bytes) __attribute__((aligned(num_bytes)))
struct Aligned {
char ALIGN(4) a4;
char ALIGN(8) a8;
char ALIGN(16) a16;
char ALIGN(32) a32;
void Test(const void* p, int size) {
printf("align %d: %d\n", size, reinterpret_cast<size_t>(p) % size);
int main() {
Aligned a;
Test(&a.a4, 4);
Test(&a.a8, 8);
Test(&a.a16, 16);
Test(&a.a32, 32);
int p = reinterpret_cast<size_t>(&a);
printf("base align: %d, %d, %d, %d\n", p%4, p%8, p%16, p%32);
return 0;