FA-11449 / Compiler transformation correctness / Member archive

Dead-result elimination deletes a volatile read · case 04

Dead-result elimination deletes a volatile read.

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

Return retained instruction IDs in order. Instructions have (id, live, effect), where effect is pure, write, volatile or trap; only unused pure operations may be removed.

Why this case matters

A deterministic miniature compiler-pass model; inputs are explicit IR facts, not a production compiler.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
write	`[]`	`[4]`	Failed

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