Le vendredi 11 avril 2008 à 11:14 -0700, Jim Wilson a écrit : > Stelian Pop wrote: > > #define PREFERRED_RELOAD_CLASS(X, CLASS) \ > > ((CONSTANT_P(X)) ? EIGHT_REGS : \ > > (MEM_P(X)) ? EVEN_REGS : CLASS) > > > > #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \ > > ((CONSTANT_P(X)) ? EIGHT_REGS : \ > > (MEM_P(X)) ? EVEN_REGS : CLASS) > > I think most of your trouble is here. Suppose we are trying to reload a > constant into an even-reg. We call PREFERRED_RELOAD_CLASS, which says > to use eight_regs instead, and you get a fatal_insn error because you > didn't get the even-reg that the instruction needed. > > PREFERRED_RELOAD_CLASS must always return a class that is a strict > subset of the class that was passed in. > > So define another register class which is the intersection of eight regs > and even regs, and when we call PREFERRED_RELOAD_CLASS with a constant > and even regs, then return the eight/even intersection class.
Ah thanks, this does indeed seem to solve a lot of problems I had ! > Likewise in all of the other cases you are trying to handle. > > Fix this problem, and you probably don't need most of the other changes > you have made recently. I will still have the problems with the fact that my indirect addressing doesn't allow displacements, no ? (so I would need to implement LEGITIMIZE_RELOAD_ADDRESS, in which I'll need a special reserved register to compute the full address by adding the base and the displacement). Or do you imply that I won't need this anymore ? Thanks, -- Stelian Pop <[EMAIL PROTECTED]>
