I'm working with a target which has address registers which are shorter than an integer. Pmode is defined as PSImode, not SImode. There are a limited number of operations on the address registers, including pre/post-increment/decrement, but not generalized arithmetic.
I'm running into a number of problems. Instruction costs used in loops-ivopts are wildly inflated so loop invariants are not recognized and it looks like combine doesn't recognize that it can combine a memory access with an increment into a single instruction, possibly because of mode differences. Are there any architectures which have Pmode != INT? Is this the right way to describe this kind of architecture? There's a comment in the m32r description: The M32R doesn't have full 32 bit pointers, but making this PSImode has its own problems (you have to add extendpsisi2 and truncsipsi2). Try to avoid it. -- Michael Eager [EMAIL PROTECTED] 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077
