On Wed, Mar 20, 2013 at 12:24 PM, Jakub Jelinek <ja...@redhat.com> wrote: > On Wed, Mar 20, 2013 at 12:20:27PM +0100, Richard Biener wrote: >> Walking the SSA def chain would also be possible - preferably from >> cfgexpand.c when we process the stmt. But you'll eventually lose >> debug info like for >> >> int i = 1; >> __builtin_foo (i); >> >> when we then never expand the SSA name def i_2 = 1 because we are >> never visiting its use ... > > If i is a user variable, then for -O0 we'd better create a memory slot for > it and expand the i = 1 store as store to that memory location.
Ok, we seem to do that... Richard. > Jakub
