3 files changed, 67 insertions, 0 deletions
diff --git a/tests/core/test_set_align.c b/tests/core/test_set_align.c
new file mode 100644
index 00000000..26158ef4
--- /dev/null
+++ b/tests/core/test_set_align.c
@@ -0,0 +1,50 @@
+
+#include <stdio.h>
+#include <emscripten.h>
+ 
+volatile char data[16];
+ 
+__attribute__((noinline)) void *get_aligned(int align)
+{
+  char *ptr = (char*)(((int)(data + 7)) & ~7); // Make 8-byte aligned
+  ptr += align; // Now 'align' aligned
+  return (void*)ptr;
+}
+ 
+int main()
+{
+  emscripten_align4_double *d4 = (emscripten_align4_double*)get_aligned(4);
+  *d4 = 17.0;
+  printf("addr: %d, value: %f\n", ((int)d4) % 8, *d4);
+
+  emscripten_align2_double *d2 = (emscripten_align2_double*)get_aligned(2);
+  *d2 = 18.0;
+  printf("addr: %d, value: %f\n", ((int)d2) % 8, *d2);
+
+  emscripten_align1_double *d1 = (emscripten_align1_double*)get_aligned(1);
+  *d1 = 19.0;
+  printf("addr: %d, value: %f\n", ((int)d1) % 8, *d1);
+
+  emscripten_align2_float *f2 = (emscripten_align2_float*)get_aligned(2);
+  *f2 = 20.0;
+  printf("addr: %d, value: %f\n", ((int)f2) % 4, *f2);
+
+  emscripten_align1_float *f1 = (emscripten_align1_float*)get_aligned(1);
+  *f1 = 21.0;
+  printf("addr: %d, value: %f\n", ((int)f1) % 4, *f1);
+
+  emscripten_align2_int *i2 = (emscripten_align2_int*)get_aligned(2);
+  *i2 = 22;
+  printf("addr: %d, value: %d\n", ((int)i2) % 4, *i2);
+
+  emscripten_align1_int *i1 = (emscripten_align1_int*)get_aligned(1);
+  *i1 = 23;
+  printf("addr: %d, value: %d\n", ((int)i1) % 4, *i1);
+
+  emscripten_align1_short *s1 = (emscripten_align1_short*)get_aligned(1);
+  *s1 = 24;
+  printf("addr: %d, value: %d\n", ((int)s1) % 4, (int)*s1);
+
+  return 0;
+}
+
diff --git a/tests/core/test_set_align.out b/tests/core/test_set_align.out
new file mode 100644
index 00000000..55e377b0
--- /dev/null
+++ b/tests/core/test_set_align.out
@@ -0,0 +1,8 @@
+addr: 4, value: 17.000000
+addr: 2, value: 18.000000
+addr: 1, value: 19.000000
+addr: 2, value: 20.000000
+addr: 1, value: 21.000000
+addr: 2, value: 22
+addr: 1, value: 23
+addr: 1, value: 24
diff --git a/tests/test_core.py b/tests/test_core.py
index 62a061e2..505a051b 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -1980,6 +1980,15 @@ too many setjmps in a function call, build with a higher value for MAX_SETJMPS''
 
     self.do_run_from_file(src, output)
 
+  def test_set_align(self):
+    if self.run_name == 'slow2asm': return self.skip('FIXME in slow2asm')
+
+    Settings.SAFE_HEAP = 1
+
+    test_path = path_from_root('tests', 'core', 'test_set_align')
+    src, output = (test_path + s for s in ('.c', '.out'))
+    self.do_run_from_file(src, output)
+
   def test_emscripten_api(self):
       #if Settings.MICRO_OPTS or Settings.RELOOP or Building.LLVM_OPTS: return self.skip('FIXME')