index

  - test index
  - impl. index in llvm
  - convert to loop counter from uint64_t -> int32_t
    to match how we use it in other backends

Change-Id: Iee371d67eddaace068906b861292eb5ed3d74c95
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/274135
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Herb Derby <herb@google.com>
2 files changed