[llvm] r351526 - [AVR] Rewrite the CBRRdK instruction as an alias of ANDIRdK

[Eli Friedman via llvm-commits]

On 1/17/2019 11:31 PM, Dylan McKay via llvm-commits wrote:
> Author: dylanmckay
> Date: Thu Jan 17 23:31:34 2019
> New Revision: 351526
>
> URL: http://llvm.org/viewvc/llvm-project?rev=351526&view=rev
> Log:
> [AVR] Rewrite the CBRRdK instruction as an alias of ANDIRdK
> +// imm_com8_XFORM - Return the complement of a t2_so_imm value
> +def imm_com8_XFORM : SDNodeXForm<imm, [{
> +  return CurDAG->getTargetConstant(~((uint8_t)N->getZExtValue()), SDLoc(N),
> +                                   MVT::i8);
> +}]>;

The comment refers to t2_so_imm?

> +
> +// imm_com8 - Match an immediate that is a complement
> +// of a 8-bit immediate.
> +// Note: this pattern doesn't require an encoder method and such, as it's
> +// only used on aliases (Pat<> and InstAlias<>). The actual encoding
> +// is handled by the destination instructions, which use t2_so_imm.

Also here, refers to t2_so_imm

-Eli

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