1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr34971.c b/gcc/testsuite/gcc.c-torture/execute/pr34971.c
new file mode 100644
index 000000000..3299aee22
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr34971.c
@@ -0,0 +1,22 @@
+struct foo
+{
+  unsigned long long b:40;
+} x;
+
+extern void abort (void);
+
+void test1(unsigned long long res)
+{
+  /* Build a rotate expression on a 40 bit argument.  */
+  if ((x.b<<8) + (x.b>>32) != res)
+    abort ();
+}
+
+int main()
+{
+  x.b = 0x0100000001;
+  test1(0x0000000101);
+  x.b = 0x0100000000;
+  test1(0x0000000001);
+  return 0;
+}