1 files changed, 15 insertions, 0 deletions
diff --git a/test/CodeGen/2008-01-07-UnusualIntSize.c b/test/CodeGen/2008-01-07-UnusualIntSize.c
new file mode 100644
index 000000000000..bf0ca5575a6a
--- /dev/null
+++ b/test/CodeGen/2008-01-07-UnusualIntSize.c
@@ -0,0 +1,15 @@
+// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
+// PR1721
+
+struct s {
+  unsigned long long u33: 33;
+} a, b;
+
+// This should have %0 and %1 truncated to 33 bits before any operation.
+// This can be done using i33 or an explicit and.
+_Bool test(void) {
+  // CHECK: and i64 %[[TMP1:[0-9]+]], 8589934591
+  // CHECK-NOT: and i64 [[TMP1]], 8589934591
+  // CHECK: and i64 %{{[0-9]}}, 8589934591
+  return a.u33 + b.u33 != 0;
+}