"kernel coder" <[EMAIL PROTECTED]> writes: > thanks,There is a macro LEGITIMIZE_RELOAD_ADDRESS.Accroding to gcc internals > "It is a C compound statement that attempts to replace x, which is an > address that needs > reloading, with a valid memory address for an operand of mode mode. > win will be a > C statement label elsewhere in the code". > > I'm not been able to comprehend this macro.
LEGITIMIZE_RELOAD_ADDRESS is basically a hook into the reload pass to do machine specific optimizations. It is difficult to understand without a clear notion of what the reload pass does. > The explaination is saying > that it tries to replace the address with some suitable address.But > when will such a situation occur,any example will be helpful. You can find examples by doing a grep for LEGITIMIZE_RELOAD_ADDRESS in gcc/config/*/*.h. > And what > is reloading pass.According to gcc internals in this pass > pseudo-registers are replaced with hard registers and some are > assigned stack slots.Is there anything else which happens in this > phase. That's pretty much it. The details get rather complex. There is some discussion at http://gcc.gnu.org/wiki/reload. > Is above mentioned macro also has something to do with pass. Yes. Ian
