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    "result": "This postcondition quantifies over every operation in both programs in pre-order at any nesting depth, including the root module, using `input.operations` and `output.operations`; it never matches entities by identity, only by name, attribute presence, and count. It selects four sequences: the `llvm.intr.ctlz` operations and the `llvm.intr.cttz` operations, in each of the input and the output, that carry a key named `is_zero_poison` in their attributes/properties map whose boolean projection is true; operations with that key absent, or present but false, are excluded from the four selections. The first two assertions accept a program pair only when the output contains exactly as many true-`is_zero_poison` `llvm.intr.ctlz` operations as the input does, and likewise exactly as many true-`is_zero_poison` `llvm.intr.cttz` operations; any net increase or decrease in either count is rejected, while a deletion compensated by an unrelated addition of the same kind is accepted, since only cardinalities are compared and no operand, result, type, location, or containment correspondence is checked. The third assertion rejects any output operation named `math.ctlz` or `math.cttz` that has an `is_zero_poison` key at all, regardless of whether its value is true, false, or non-boolean; `math.ctlz`/`math.cttz` operations without that key are accepted without further constraint, and the input side is not examined by this assertion. Allowed value sources are limited to literal operation-name strings, the literal attribute key `\"is_zero_poison\"`, the total `in` membership test on the attribute map, the `.bool` projection, and `cardinality`; no helper definitions, symbol resolution, or segment decoding are used. The first two assertions are non-vacuous only when at least one side has a matching poison-flagged operation, and they pass trivially as `0 == 0` when neither program contains any; the third is vacuously satisfied whenever the output has no `math.ctlz` or `math.cttz` operations. Because the selections guard key presence with `in` before projecting, a missing `is_zero_poison` never errors, but an `is_zero_poison` attribute on an `llvm.intr.ctlz` or `llvm.intr.cttz` operation whose kind is not boolean makes `.bool` an evaluation error rather than a simple rejection. Nothing else about the two programs \u2014 other dialects, other `llvm.intr.*` operations, structure, or ordering \u2014 is constrained.",
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