[Mlir-commits] [mlir] [mlir][arith] doc updates for ub semantics, and int representations (PR #72932)

[Fehr Mathieu]

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@@ -385,8 +398,9 @@ def Arith_DivUIOp : Arith_IntBinaryOp<"divui", [ConditionallySpeculatable]> {
     the most significant, i.e. for `i16` given two's complement representation,
     `6 / -2 = 6 / (2^16 - 2) = 0`.
 
-    Note: the semantics of division by zero is TBD; do NOT assume any specific
-    behavior.
+    Division by zero is undefined behaviour. When applied to `vector` and 
+    `tensor` values, the result is undefined if _any_ elements are divided by 
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math-fehr wrote:

My understanding is that it's not the result that is undefined, but there is undefined behavior? (i.e., it may not execute the next instructions)

https://github.com/llvm/llvm-project/pull/72932