--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr53037-1.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,81 @@
+/* PR c/53037.  */
+/* { dg-do compile } */
+/* { dg-options "-O0" } */
+
+typedef unsigned long long __u64
+  __attribute__((aligned(4),warn_if_not_aligned(8)));
+
+struct foo1
+{
+  int i1;
+  int i2;
+  int i3;
+  __u64 x; /* { dg-warning "'x' offset 12 in 'struct foo1' isn't aligned to 8" } */
+}; /* { dg-warning "alignment 4 of 'struct foo1' is less than 8" } */
+
+struct foo2
+{
+  int i1;
+  int i2;
+  int i3;
+  __u64 x; /* { dg-warning "'x' offset 12 in 'struct foo2' isn't aligned to 8" } */
+} __attribute__((aligned(8)));
+
+struct foo3
+{
+  int i1;
+  int i3;
+  __u64 x;
+}; /* { dg-warning "alignment 4 of 'struct foo3' is less than 8" } */
+
+struct foo4
+{
+  int i1;
+  int i2;
+  __u64 x;
+} __attribute__((aligned(8)));
+
+struct foo5
+{
+  int i1;
+  int x __attribute__((warn_if_not_aligned(16))); /* { dg-warning "'x' offset 4 in 'struct foo5' isn't aligned to 16" } */
+}; /* { dg-warning "alignment 4 of 'struct foo5' is less than 16" } */
+
+struct foo6
+{
+  int i1;
+  int x __attribute__((warn_if_not_aligned(16))); /* { dg-warning "'x' offset 4 in 'struct foo6' isn't aligned to 16" } */
+} __attribute__((aligned(16)));
+
+struct foo7
+{
+  int i1;
+  int i2;
+  int i3;
+  int i4;
+  int x __attribute__((warn_if_not_aligned(16)));
+} __attribute__((aligned(16)));
+
+union bar1
+{
+  int i1;
+  __u64 x;
+}; /* { dg-warning "alignment 4 of 'union bar1' is less than 8" } */
+
+union bar2
+{
+  int i1;
+  __u64 x;
+} __attribute__((aligned(8)));
+
+union bar3
+{
+  int i1;
+  int x __attribute__((warn_if_not_aligned(16))); 
+}; /* { dg-warning "alignment 4 of 'union bar3' is less than 16" } */
+
+union bar4
+{
+  int i1;
+  int x __attribute__((warn_if_not_aligned(16)));
+} __attribute__((aligned(16)));