1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pr45017.c b/gcc/testsuite/gcc.dg/torture/pr45017.c
new file mode 100644
index 000000000..f2e02bcea
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr45017.c
@@ -0,0 +1,24 @@
+/* { dg-do run { target i?86-*-* x86_64-*-* } } */
+
+int tester(char *bytes)
+{
+  union {
+      struct {
+	  unsigned int r1:4;
+	  unsigned int r2:4;
+      } fmt;
+      char value[1];
+  } ovl;
+
+  ovl.value[0] = bytes[0];
+  return ovl.fmt.r1;
+}
+extern void abort (void);
+int main()
+{
+  char buff = 0x2f;
+  if (tester(&buff) != 0x0f)
+    abort ();
+  return 0;
+}
+