On Fri, Sep 10, 2010 at 5:39 PM, Paulo J. Matos <pocma...@gmail.com> wrote:
> Hello,
>
> On my frontend pass, I am dealing with basic blocks and I am for:
> ,----
> | int f(int n)
> | {
> | switch(n)
> | {
> | case 0: f1("0"); break;
> | case 500: f2("500"); break;
> | case 1000: f3("1000"); break;
> | default: d(); break;
> | }
> | }
> `----
>
> transforming it into:
> ,----
> | int f(int n)
> | {
> | if(n < 500)
> | if(n == 0)
> | f1("0");
> | else
> | goto def;
> | else
> | if(n == 500)
> | f2("500");
> | else
> | if(n == 1000)
> | f3("1000");
> | else
> | goto def;
> |
> | return;
> |
> | def:
> | d();
> | return;
> | }
> `----
>
> The problem with this is that it contains nested ifs.
> Is there a way for me to insert this tree and ask GCC to rebuild the CFG
> or I need to build the correct CFG manually?
You need to build it manually.
Richard.
> Cheers,
> --
> PMatos
>
>
