1 files changed, 39 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pr37868.c b/gcc/testsuite/gcc.dg/torture/pr37868.c
new file mode 100644
index 000000000..1f89dff2f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr37868.c
@@ -0,0 +1,39 @@
+/* { dg-do run } */
+/* { dg-options "-fno-strict-aliasing" } */
+/* { dg-skip-if "unaligned access" { sparc*-*-* } "*" "" } */
+
+extern void abort (void);
+#if (__SIZEOF_INT__ <= 2)
+struct X {
+  unsigned char pad : 4;
+  unsigned int a : 16;
+  unsigned int b : 8;
+  unsigned int c : 6;
+} __attribute__((packed));
+#else
+struct X {
+  unsigned char pad : 4;
+  unsigned int a : 32;
+  unsigned int b : 24;
+  unsigned int c : 6;
+} __attribute__((packed));
+
+#endif
+
+
+int main (void)
+{
+  struct X x;
+  unsigned int bad_bits;
+
+  x.pad = -1;
+  x.a = -1;
+  x.b = -1;
+  x.c = -1;
+
+  bad_bits = ((unsigned int)-1) ^ *(1+(unsigned int *) &x);
+  if (bad_bits != 0)
+    abort ();
+  return 0;
+}
+