Emit less garbage without opts, if it has no side effects #1141
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| for (ImVar var : analyzer.directlySetVariables(expr)) { | ||
| if (var.isGlobal()) { | ||
| return true; |
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The new side‑effect filter only treats writes to globals as effects, so any RHS expression that mutates a local (e.g., a statement‑block expression that does x = 1; 42 and is assigned to an otherwise unused variable) will now be dropped by removeGarbage. That changes semantics because the local update is observable later in the same function, even though it isn’t global. Consider flagging local writes as side effects when the target variable is later read, or conservatively treat any directlySetVariables hit as a side effect in this context.
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