llvm-project

4f5d67b3 - [AArch64] "Support" debug info for SVE types on Windows. (#147865)

[AArch64] "Support" debug info for SVE types on Windows. (#147865) There isn't any way to encode a variable in an SVE register, and there isn't any way to encode a scalable offset, and as far as I know that's unlikely to change in the near future. So suppress any debug info which would require those encodings. This isn't ideal, but we need to ship something which doesn't crash. Alternatively, for Z registers, we could emit debug info assuming the vector length is 128 bits, but that seems like it would lead to unintuitive results. The change to AArch64FrameLowering is needed to avoid a crash. But we can't actually test that the returned offset is correct: LiveDebugValues performs the query, then discards the result.