1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/update-threading.c b/gcc/testsuite/gcc.dg/tree-ssa/update-threading.c
new file mode 100644
index 000000000..58b26e615
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/update-threading.c
@@ -0,0 +1,24 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+typedef struct { unsigned short a; } A;
+
+extern void abort (void);
+extern void exit (int);
+
+void foo (unsigned int x)
+{
+  if (x != 0x800 && x != 0x810)
+    abort ();
+}
+
+int
+main (int argc, char **argv)
+{
+  int i;
+  for (i = 0; i < 2; ++i)
+    foo (((A) { ((!(i >> 4) ? 8 : 64 + (i >> 4)) << 8) + (i << 4) } ).a);
+  exit (0);
+}
+/* { dg-final { scan-tree-dump-times "Invalid sum" 0 "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */