1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/pr27671-1.c b/gcc/testsuite/gcc.c-torture/execute/pr27671-1.c
new file mode 100644
index 000000000..dd2982cc8
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr27671-1.c
@@ -0,0 +1,21 @@
+/* PR rtl-optimization/27671.
+   The combiner used to simplify "a ^ b == a" to "a" via
+   simplify_relational_operation_1 in simplify-rtx.c.  */
+
+extern void abort (void) __attribute__ ((noreturn));
+extern void exit (int) __attribute__ ((noreturn));
+
+static int __attribute__((noinline))
+foo (int a, int b)
+{
+  int c = a ^ b;
+  if (c == a)
+    abort ();
+}
+
+int
+main (void)
+{
+  foo (0, 1);
+  exit (0);
+}