[Bug tree-optimization/59970] Bogus warnings at low optimization levels

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59970

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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          Component|middle-end                  |tree-optimization

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I don't think this is a GCC bug except for the unitialized predicates is not
working.  The reason why it fails for -Og is because jump threading is disabled
as you want to be able to step through the code.  -O1 must not decided jump
threading is profitable either.

For the unitialized predicates issue, it might be because switch statements are
not handled.