Dubious "'foo' might be used uninitialized in this function" message

[Nathan Sidwell]

Dmitry Antipov wrote:

> w.c: In function `f':
> w.c:5: warning: 'z' might be used uninitialized in this function
> 
> which is not true.
'tis true too, just here.
    return x + y + z;

read the documentation for -Wuninitialized, which will explain
why it can't get all the cases correct.

> Is it reasonable to learn GCC do more analysis in attempt to avoid
> warning in this case ? How is it complex ?

it gets as complex as the halting problem :)

nathan

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