1 files changed, 44 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/g++.dg/torture/pr33887-1.C b/gcc-4.9/gcc/testsuite/g++.dg/torture/pr33887-1.C
new file mode 100644
index 000000000..2f17d9583
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/g++.dg/torture/pr33887-1.C
@@ -0,0 +1,44 @@
+/* { dg-do run } */
+
+extern "C" void abort (void);
+struct S { unsigned int i : 24; } x;
+void __attribute__((noinline)) test1()
+{
+  if (--x.i != 0x00ffffff)
+    abort ();
+  if (x.i != 0x00ffffff)
+    abort ();
+}
+void __attribute__((noinline)) test2()
+{
+  if (x.i-- != 0)
+    abort ();
+  if (x.i != 0x00ffffff)
+    abort ();
+}
+void __attribute__((noinline)) test3()
+{
+  if (++x.i != 0)
+    abort ();
+  if (x.i != 0)
+    abort ();
+}
+void __attribute__((noinline)) test4()
+{
+  if (x.i++ != 0x00ffffff)
+    abort ();
+  if (x.i != 0)
+    abort ();
+}
+int main()
+{
+  x.i = 0;
+  test1();
+  x.i = 0;
+  test2();
+  x.i = 0x00ffffff;
+  test3();
+  x.i = 0x00ffffff;
+  test4();
+  return 0;
+}