Fix function to pointer conversion

This snippet is valid:
  void foo(void);
  ... foo + 42 ...
the function designator is converted to pointer to function
implicitely.  gen_op didn't do that and bailed out.

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/tcctest.c b/tests/tcctest.c
index 0b894aa..8aa50ab 100644
--- a/tests/tcctest.c
+++ b/tests/tcctest.c
@@ -1847,6 +1847,7 @@ void funcptr_test()
         int dummy;
         void (*func)(int);
     } st1;
+    long diff;
 
     printf("funcptr:\n");
     func = #
@@ -1862,6 +1863,12 @@ void funcptr_test()
     printf("sizeof2 = %d\n", sizeof funcptr_test);
     printf("sizeof3 = %d\n", sizeof(&funcptr_test));
     printf("sizeof4 = %d\n", sizeof &funcptr_test);
+    a = 0;
+    func = num + a;
+    diff = func - num;
+    func(42);
+    (func + diff)(42);
+    (num + a)(43);
 }
 
 void lloptest(long long a, long long b)