Boris Boesler <baembel@xxxxxx> writes: > Now I need a pass to insert the missing NOPs. The approach Ian > mentioned with the DFA-simulator does not work, because the simulator > detects structural hardware hazards only (see http://www.nabble.com/Re > %3A-Question-of-the-DFA-scheduler-p603486.html), which can not occur > in my processor. Or did the DFA change? I didn't suggest using the DFA simulator. I agree that that won't work. What I suggested was to insert the NOPs in the TARGET_ASM_FUNCTION_PROLOGUE hook. This is not a scheduling hook. It is target specific code that is run immediately before the assembly instructions are generated. It seems to me that I keep saying the same thing, and you keep saying that it won't work without explaining why. I won't reply again. Andrew's suggestion of using TARGET_MACHINE_DEPENDENT_REORG can also work. I don't like that approach as much in practice because it doesn't work in conjunction with delay slots. On some machines delay slots are a good way to model VLIW semantics, in which instructions can execute in parallel. Ian
