[LLVMdev] Adding instruction to mips backend
dhallmannseder at hsu-hh.de
Mon Feb 8 05:37:15 PST 2010
There are no errors, but the new instruction isn't processed by the
backend. I have added support to SelectionDAG, but probably not enough.
The instruction I want to add is a load instruction. I need this new
load instruction because I want to distinguish it from the already
available load instruction. This is necessary because of the target
platform which uses this new load for special purposes. I think the
addition of the SelectionDAG is insufficient. Is there a detailed
description, how to insert all necessary information into the
SelectionDAG part ?
Am 2.2.2010 22:59, schrieb Jim Grosbach:
> What sorts of errors are you seeing? My first guess would be that you need to add support for the new instruction to the SelectionDAG machinery (see lib/CodeGen/SelectionDAG/*).
> What instruction are you looking to add?
> On Feb 1, 2010, at 3:11 AM, Daniel Hallmannseder wrote:
>> I've extended the LLVM IR with a new Instruction. This part works well.
>> But I also want to extend the MIPS backend with an associative machine
>> instruction, and in this part, I didn't succeed. I read the tutorials,
>> but I couldn't realize the code generation for the new LLVM IR
>> instruction. Which parts have to be modified ?
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
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