[llvm-bugs] [Bug 238835] [mlir][SPIR-V] `convert-spirv-to-llvm` `spirv.BitFieldSExtract` performs a bit-width shift (LLVM poison) when `count = 0`; the SPIR-V spec defines the result as `0`

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Wed Nov 4 08:12:19 PST 2026

Previous message: [llvm-bugs] [Bug 238834] [mlir][SPIR-V] `convert-spirv-to-llvm` miscompiles `spirv.BitFieldInsert`: the `insert` operand is never masked to `count` bits (and `count = 0` returns the wrong value)
Next message: [llvm-bugs] [Bug 238836] [mlir][SPIR-V] `convert-spirv-to-llvm` `spirv.BitFieldUExtract` returns a poison-derived value for `offset = 0, count = W`; the SPIR-V spec result is `base` itself
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