[Bug middle-end/51994] [4.6/4.7 Regression] git-1.7.8.3 miscompiled due to negative bitpos from get_inner_reference

["ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51994

--- Comment #10 from Uros Bizjak <ubizjak at gmail dot com> 2012-01-25 14:41:39 UTC ---
(In reply to comment #7)
> Testcase that crashes on alpha:

Actually, the test in comment #7 exposed the problem, but was not 100% correct.

This one is:

--cut here--
#include <string.h>

extern void abort (void);

char __attribute__((noinline))
test (int a)
{
  char buf[16];
  char *output = buf;

  strcpy (&buf[0], "0123456789");

  output += a;
  output -= 1;

  return output[0];
}

int main ()
{
  if (test (2) != '1')
    abort ();

  return 0;
}
--cut here--