1 files changed, 71 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/opt/pr19650.C b/gcc/testsuite/g++.dg/opt/pr19650.C
new file mode 100644
index 000000000..1f495cb7d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/pr19650.C
@@ -0,0 +1,71 @@
+// { dg-options "-O1 -w -fpermissive" }
+// { dg-do run }
+// Tests the fold bug described in PR 19650.
+#include <stdio.h>
+#include <stdlib.h>
+#define test(a) ((a) ? 1 : 0)
+
+typedef int (*arg_cmp_func)();
+
+class Item_func 
+{
+public:
+    enum Functype { UNKNOWN_FUNC, EQ_FUNC, EQUAL_FUNC };
+    virtual enum Functype functype() const { return UNKNOWN_FUNC; }
+};
+
+class Item_bool_func2 : public Item_func
+{
+public:
+    virtual enum Functype functype() const { return EQUAL_FUNC; }
+};
+
+class Arg_comparator 
+{
+public:
+    Item_bool_func2 *owner;
+    arg_cmp_func func;
+    static arg_cmp_func comparator_matrix[4][2];
+
+    int Arg_comparator::set_compare_func(Item_bool_func2 *item, int type)
+    {
+        owner = item;
+
+        /****************** problematic line is here ************************/
+
+        func = comparator_matrix[type][test(owner->functype() == Item_func::EQUAL_FUNC)];
+        return 0;
+    }
+};
+
+int compare_string() { return 0; }
+int compare_e_string() { return 0; }
+int compare_real() { return 0; }
+int compare_e_real() { return 0; }
+int compare_int_signed() { return 0; }
+int compare_e_int() { return 0; }
+int compare_row() { return 0; }
+int compare_e_row() { return 0; }
+
+arg_cmp_func Arg_comparator::comparator_matrix[4][2] =
+    {{&compare_string,     &compare_e_string},
+     {&compare_real,       &compare_e_real},
+     {&compare_int_signed, &compare_e_int},
+     {&compare_row,        &compare_e_row}};
+
+void myfunc (const char*p, arg_cmp_func f1, arg_cmp_func f2) __attribute__((noinline));
+void myfunc (const char*p, arg_cmp_func f1, arg_cmp_func f2)
+{
+    if (f1!=f2)
+      abort ();
+}
+
+int main()
+{
+    Arg_comparator cmp;
+    Item_bool_func2 equal_func;
+
+    cmp.set_compare_func(&equal_func, 0);
+    myfunc("cmp.func is %p (expected %p)\n", cmp.func, &compare_e_string);
+}
+