[LLVMdev] Assertion failed after my storeRegToStackSlot/loadFromStackSlot

[Dmitriy Limonov]

Hi Lang.

Thank you. I added pseudo-instructions for spill/reloads and expanded it 
in expandPostRAPseudo.

Regards,
Dmitriy.


04.03.2013 8:24, Lang Hames wrote:
> Hi Dmitriy,
>
> As you've seen our current spill code assumes that spill/reloads are 
> single instructions. I think the best way to work around this is to 
> introduce load/store pseudo-instructions and expand these after 
> register allocation.
>
> Cheers,
> Lang.
>
>
> On Sat, Feb 23, 2013 at 12:15 AM, Dmitriy Limonov <earl at excluzive.ws 
> <mailto:earl at excluzive.ws>> wrote:
>
>     Hi All.
>
>     I'm writing storeRegToStackSlot and loadFromStackSlot function for
>     my Target. This Target can store/load one byte (not all word) from
>     FrameIndex. If I need to store 16 bit register I will must to
>     split it to two instruction like this:
>
>     BuildMI(MBB, MI, dl, get(Z80::LD8xmr))
>       .addFrameIndex(FrameIndex).addImm(0)
>       .addReg(SrcReg, 0, Z80::subreg_lo);
>     BuildMI(MBB, MI, dl, get(Z80::LD8xmr))
>       .addFrameIndex(FrameIndex).addImm(1)
>       .addReg(SrcReg, getKillRegState(isKill), Z80::subreg_hi);
>
>     After this store I catch assertion failed: "Instruction not found
>     in maps", because only last of this instruction added in
>     Instruction maps.
>     How can I avoid assertion failed in this case?
>
>     Best regards, Dmitriy.
>
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