[PATCH] D79644: [mlir][StandardToSPIRV] Add support for lowering index_cast to SPIR-V.

[Lei Zhang via Phabricator via llvm-commits]

antiagainst added a comment.

In D79644#2027720 <https://reviews.llvm.org/D79644#2027720>, @hanchung wrote:

> I think indices could be negative? so switch to using SConvert.


Yeah the semantics of std.index_cast requires sign extending : https://mlir.llvm.org/docs/Dialects/Standard/#stdindex_cast-indexcastop


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https://reviews.llvm.org/D79644