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[Bug regression/24956] Optimizer and uninitialised variables.



------- Comment #3 from s_a_white at email dot com  2005-11-20 14:15 -------
Sorry the summary may not be 100% correct, but it is related to the variable
never being directly assigned.

I do understand that using (i.e. assigning from an unintialised variable) will
give you random junk, etc.  However if you look at the example below you'll see
the variable becomes fully assigned (the result is always known given a
uint_least32_t being 32 bits).  And indeed the first printf does display the
correct answer.

However whats happened is that some of the code inside the if statement has
executed, which is should never have!

Please if this code is actually invalid... and indeed somehow the code inside
the if statement can legally be executed please could you reclose the bug and
drop me a note on why?  So far have never seen even highly optimising compilers
(e.g. TI c6x, etc) do this.


-- 

s_a_white at email dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|INVALID                     |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24956


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