On Sun, Sep 25, 2011 at 19:00, Richard Sandiford
wrote:
> There was some discussion a while back about whether we should propagate
> hard regs. But I think that was in the context of propagating a hard-reg
> SET_SRC. In this case, BLAH only mentions pseudos, and I think propagating
> for:
>
>
While working on a MIPS16 patch, I came across an ICE on code like:
(set (reg:DI 64) (unspec:DI BLAH))
(set (reg:SI PSEUDO) (reg:SI 64))
The problem was that fwprop.c:forward_propagate_and_simplify
tried to replace (reg:SI 64) with (unspec:DI BLAH), i.e. it tried
to replace an SImode valu
