search for: instrincs

...uccessfull? What problems did you have? * What parts of the LLVM backend code generator infrastructure would be usable for targeting a stack machine? e.g. Is it even possible to use TableGen to target a stack machine? * When/where/how do things like big integer (iXXXXX), phi nodes, llvm.* instrincs get lowered; e.g. does my target have to do that, or is it done generically? Ultimtely, I'm wondering if targeting a stack machine with the current LLVM infrastructure is going to be somewhat straightforward even if it's not totally optimal (desirable), or if it's going to be so pro...

...in lib/CodeGen/LLVMTargetMachine.cpp for a high-level overview of how CodeGen works. It might also be useful to look at LLVM handles x87 floating-point; the relevant code is in lib/Target/X86/X86FloatingPoint.cpp. > * When/where/how do things like big integer (iXXXXX), phi nodes, llvm.* > instrincs get lowered; e.g. does my target have to do that, or is it done > generically? Aribitrary-width integers, vectors, llvm.*, etc. are lowered generically by the Legalize infrastructure; the backend just has to say what it can and can't support. See lib/Target/X86/X86ISelLowering.cpp for an e...

...uccessfull? What problems did you have? * What parts of the LLVM backend code generator infrastructure would be usable for targeting a stack machine? e.g. Is it even possible to use TableGen to target a stack machine? * When/where/how do things like big integer (iXXXXX), phi nodes, llvm.* instrincs get lowered; e.g. does my target have to do that, or is it done generically? Ultimtely, I'm wondering if targeting a stack machine with the current LLVM infrastructure is going to be somewhat straightforward even if it's not totally optimal (desirable), or if it's going to be so pro...