i386-linux cross sh-elf breakage

[Richard Henderson]

On Tue, May 16, 2000 at 02:01:46PM -0500, Clinton Popetz wrote:
> But optimize_mode_switching is adding a (use) in the exit block.

What sort of use?  A naked (insn x x x (use foo)) or something
buried in another pattern.  The former would strike me as wrong.

> Richard, should recompute_reg_usage use UPDATE_LIFE_GLOBAL, or should we
> call update_life_info after optimize_mode_switching?

That said, optimize_mode_switching may very well need to redo
global life info anyway.  We may want to tweek when no_new_pseudos
gets set in that case too, so that we don't overwork wrt 
recompute_reg_usage.


r~