sdcc/support/regression/tests/bug-3240.c

   1 /*
   2    bug-3240.c. Stack register parameters were not correctly checked for having their address taken
   3    resulting in incorrect tail call optimization, thus calls where spilt local variables in the calle
   4    overwrote the spilt register parameter.
   5  */
   6
   7 #include <testfwk.h>
   8
   9 #include <string.h>
  10
  11 void bar(void);
  12
  13 int *p;
  14
  15 void foo(int a) __z88dk_callee
  16 {
  17         p = &a;
  18         bar();
  19 }
  20
  21 void check(char *buffer)
  22 {
  23         ASSERT (*p == 23);
  24         ASSERT (buffer[0] == 42);
  25 }
  26
  27 void bar(void)
  28 {
  29         char buffer[8];
  30         memset(buffer, 42, 8);
  31         check(buffer);
  32 }
  33
  34 void
  35 testBug (void)
  36 {
  37   foo(23);
  38   return;
  39 }
  40