[mlir][ArithToSPIRV] Fix invalid SPIRV and crashes when lowering integer ops on i1 (#189239) Several arith integer operations on i1 / vector<Ni1> types were either crashing or producing invalid SPIRV. The i1 type maps to spirv.bool in SPIRV, not to a SPIRV integer — so standard integer SPIRV ops (spirv.IAdd, spirv.UDiv, spirv.GLSMax, etc.) are illegal on it. Add dedicated boolean patterns for all affected arith integer ops, each with benefit=2 to take priority over the generic elementwise patterns. The semantics for i1 follow from treating true = 1 / false = 0 with two's complement wrapping: - addi, subi → spirv.LogicalNotEqual (XOR on bits) - muli, divui, divsi → spirv.LogicalAnd - remui, remsi, shli, shrui → spirv.LogicalAnd(a, spirv.LogicalNot(b)) (a & ~b) - shrsi → identity (arithmetic right shift of a 1-bit signed value is always the input) - maxui, minsi → spirv.LogicalOr (unsigned max / signed min treats true as larger) - maxsi, minui → spirv.LogicalAnd (signed max / unsigned min treats false as larger) Fixes #61162 Assisted-by: Claude Code
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