Ask HN: Resources for GPU Compilers?

Hi folks, I've done some cpu compilers for x86, RISC-V, LLVM (mostly for fun and some for profit). I'm eager to learn more about GPU/TPU compilers and have been looking into Triton and XLA. What resources would be useful to learn HPC and/or gpu compilers in depth (or any adjacent areas)?

Any such books, courses etc will be much appreciated.