[LLVMdev] Duplicate Label in Generates ISel

[David Greene]

On Thursday 03 December 2009 13:39, David Greene wrote:
> I've got the following problem in the X86 selector generated by
> TableGen:
>
> llvm/lib/Target/X86/X86GenDAGISel.inc:91821: error: duplicate case value
> llvm/lib/Target/X86/X86GenDAGISel.inc:91442: error: previously used here
>
> This seems to happen because of a pattern I added for VEXTRACTF128 which
> uses extract_subreg:
>
> [(set DSTREGCLASS:$dst,
>       (DSTTYPE (extract_subreg
>                   (vector_shuffle
>                      (SRCTYPE undef),
>                      (SRCTYPE SRCREGCLASS:$src1),
>                      VEXTRACTF128_shuffle_mask:$src2),
>                   x86_subreg_128bit)))],
>
> def x86_subreg_128bit  : PatLeaf<(i32 1)>;

Whoops, I forgot to fill in types:

(outs VR128:$dst), (ins VR129:$src1, i32i8imm:$src2)

[(set DSTREGCLASS:$dst,
      (v4f32 (extract_subreg
                  (vector_shuffle
                     (v8f32 undef),
                     (v8f32 SRCREGCLASS:$src1),
                     VEXTRACTF128_shuffle_mask:$src2),
                  x86_subreg_128bit)))],

                             -Dave