Problem with induction variables optimization pass

Hello, I'm currently writing a gcc 4.4.5 backend for an 18 bit architecture. I have a c-project with some thousand lines of code. Without optimizations it compiles. But with -O1 and -O2 I encounter a problem in the induction variables optimization pass. The main issue is, that a temporary

Problem with reload generating direct memory accesses also GO_IF_LEGITIMATE_ADDRESS does not permit this

Hello, I'm currently writing a gcc backend for a microcontroller architecture which can only handle indirect memory accesses. In normal cases all works fine, but there is a special case where the reload pass (<- not sure) produces a direct memory access in -O2 optimization mode which causes the

Delay slot problem

Hello, I have some trouble dealing with delay slots. The problem is that our architecture can't handle branch instructions using registers which have been changed in the previous instruction. So a delay slot is needed. The difficult part is, that this delay slot is only needed if the same regist

How to force an indirect jump?

Hello gcc gurus, I have a problem with jumps. Our architecture can only handle 13bit direct jumps and 18 bit indirect jumps. Sometimes those 13bit are not enough and I want to give the user the possibility to force jumps to be indirect jumps. Somehow I was not able to find a way to do so. The m