1 files changed, 31 insertions, 0 deletions
diff --git a/test/regression/2007-08-16-invalid-constant-value.c b/test/regression/2007-08-16-invalid-constant-value.c
new file mode 100644
index 00000000..ecb3283f
--- /dev/null
+++ b/test/regression/2007-08-16-invalid-constant-value.c
@@ -0,0 +1,31 @@
+// RUN: rm -f %t4.out %t4.err %t4.log
+// RUN: %llvmgcc %s -emit-llvm -O2 -c -o %t1.bc
+// RUN: llvm-as -f ../../Feature/_utils._ll -o %t2.bc
+// RUN: llvm-ld -disable-opt %t1.bc %t2.bc -o %t3
+// RUN: %klee %t3.bc
+
+#include <assert.h>
+
+#include "../Feature/utils.h"
+
+int main() {
+  unsigned char a;
+
+  klee_make_symbolic(&a, sizeof a);
+
+  // demand was firing here because an invalid constant
+  // value was being created when implied value did not
+  // subtract using the proper type (so overflowed into
+  // invalid bits)
+  if (util_make_concat2(a+0xCD,0xCD) == 0xABCD) { 
+    assert(!klee_is_symbolic(a));
+    printf("add constant case: %d\n", a);
+  }
+
+  if (util_make_concat2(0x0B-a,0xCD) == 0xABCD) { 
+    assert(!klee_is_symbolic(a));
+    printf("sub constant case: %d\n", a);
+  }
+
+  return 0;
+}