[Bug middle-end/36296] wrong warning about potential uninitialized variable

[vincent at vinc17 dot org]

------- Comment #5 from vincent at vinc17 dot org  2008-05-22 11:23 -------
BTW, the i = i trick, which is guaranteed to be valid and no-op only *after* i
has been initialized doesn't avoid the warning in such a case. I don't know if
this would be a good feature (the main drawback I can see would be to miss
warnings when this is a result of macro expansion). For instance:

#include <assert.h>
int foo (int x)
{
  int y;
  assert (x == 0 || x == 1);
  if (x == 0)
    y = 1;
  else if (x == 1)
    y = 2;
  y = y;  /* to tell the compiler that y has been initialized */
  return y;
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36296