[llvm-dev] SDNode type UNDEF in new llvm-backend

[Tim Northover via llvm-dev]

On 16 May 2016 at 12:56, Markus Weinhardt via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> *** Final schedule ***
> SU(2): t3: i32 = undef
>
> SU(4): t4: i32,ch = load<Volatile LD4[%a]> t0, FrameIndex:i32<0>, undef:i32

It looks like no instruction selection has happened. By the time
"Final schedule" gets decided, these should all be your machine's
native instructions. Are you sure you've implemented
XYZISelDAGToDAG::Select properly?

Cheers.

Tim.