Hello All, I am still working on a GCC backend for a custom processor. When running the compiler with following flags: gcc -O3 -S -c -fcprop-registers -frename-registers, I find out it does not optimize the allocation of the registers. The routine used is simple function, and what I see is that it allocates excess registers, in short, it does not optimize register usage. I would expect it: - performs register lifetime analysis - performs register renames as to minimize cost. Question is: I think I invoked the 2 optimizers. Could anybody point me to documentation on them ?. I think I am missing some target 'hooks', but I have no idea what it is. Best Regards, Henri.
