Re: [tree-ssa] [PATCH]: Loop invariant code motion for trees

[Daniel Berlin <dberlin at dberlin dot org>]

On Monday, August 25, 2003, at 2:50 PM, Andrew MacLeod wrote:

> On Mon, 2003-08-25 at 14:40, Daniel Berlin wrote:
> > On Monday, August 25, 2003, at 2:34 PM, Diego Novillo wrote:
> >
> > > > The changes are about 4 lines.
> > > > Want just a new tree-loop.c or a whole new patch?
> > > New patch, please.
> >
> > NP.
> > But now i get:
> >
> > cleanup.818_75 and cleanup.818_5399 conflict across an abnormal edge
> > /compilerstuff/gcc-ssa-loop-no-cfg/gcc/build/i686-pc-linux-gnu/
> > libstdc++-v3/include/bits/demangle.h: In
> >     member function `bool
> >
> > __gnu_cxx::demangler::session<Allocator>::
> > decode_type_with_postfix(std::basic_string<char,
> >     std::char_traits<char>, Allocator>&, std::basic_string<char,
> >     std::char_traits<char>, Allocator>&,
> >     __gnu_cxx::demangler::qualifier_list<Allocator>*) [with Allocator 
> > =
> >     std::allocator<char>]':
> > /compilerstuff/gcc-ssa-loop-no-cfg/gcc/build/i686-pc-linux-gnu/
> > libstdc++-v3/include/bits/demangle.h:1778: internal compiler error: in
> >     coalesce_abnormal_edges, at tree-ssa.c:1279
> >
> >
> > Andrew, what the heck have i done wrong here?
> > More importantly, what hoisting do i need to block to fix this?
> > All we did was:
>
> As a guess, Did you hoist it across an abnormal edge?
> or at least make it now live across an abnormal edge?  That'll do it 
> :-)

Possibly
:)
How can i tell given only the bb it's in, and the bb's it's going to be 
moved to?
>