FA-11457 / Compiler transformation correctness / Member archive
Phi lowering selects operands by block position · case 02
Phi lowering selects operands by block position.
Case contract
Given incoming (predecessor,value) pairs and a present predecessor label, return that edge value regardless of list order.
Why this case matters
A deterministic miniature compiler-pass model; inputs are explicit IR facts, not a production compiler.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| right edge | 2 | 3 | Failed |
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