[LLVMdev] constantexpr problem

Duncan Sands baldrick at free.fr
Fri Sep 23 09:09:33 PDT 2011

Hi Tsingray,

>     I have got a problem when I used the use_empty() member function while I
> used a global variable. I erase all the instructions which will use a global
> variable. Then I called the use_empty() on that global variable. I got no empty
> because a constantexpr use the global variable. I wonder whether there is any
> way to erase the constantexpr which is useless to me but occupying the global
> variable.

if G is your global variable, do
to replace G with undef in all users of G.  You can then safely delete G.

Ciao, Duncan.

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