[llvm] [Xtensa] Implement lowering Mul/Div/Shift operations. (PR #99981)

[Sergei Barannikov via llvm-commits]

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+; RUN: llc -mtriple=xtensa -verify-machineinstrs < %s \
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s-barannikov wrote:

All the tests are missing "autogenerated by" annotation.


https://github.com/llvm/llvm-project/pull/99981