> X86 backend doesn't accept the new expression as valid address while > (zero_extend:DI) works just fine. This patches keeps ZERO_EXTEND > when zero-extending address to Pmode. It reduces number of lea from > 24173 to 21428 in x32 libgfortran.so. Does it make any senses?
I'd be inclined to have the x86 backend accept combine's canonicalized form rather than doing a patch such as this.
