[Bug target/39232] apparent bizarre miscompilation on AVR

[regehr at cs dot utah dot edu]

------- Comment #3 from regehr at cs dot utah dot edu  2009-02-20 03:44 -------
Created an attachment (id=17335)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17335&action=view)
diff between broken and working assembly

This is a diff between the attachment compiled at -O0 and the same program but
with the declaration and initialization of l_46 commented out.  The first
problem (I claim) produces incorrect output, the second correct.  So this diff
has to show the problem.  

The change is to turn func_43() to this:

int32_t func_43 (int64_t p_44)
{
  int16_t l_45 = 1;
  //int16_t l_46 = 1;
  return l_45;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39232