rga-pressure-bridge-stub

Status: shipped (Phase 8) — see CHANGELOG.

What it detects

Per ADR 0018 §4.3, this is an infrastructure investment, not a rule per se. Fires once per source compiled under the [experimental.target = rdna4] config gate, emitting a Severity::Note informational diagnostic that points the developer to the future tools/rga-bridge work item.

Why it matters on a GPU

The current vgpr-pressure-warning rule is an AST heuristic. AMD's RGA ("Live VGPR Analysis") produces ground-truth per-block VGPR counts after codegen. The bridge is queued for v0.10; this stub keeps the candidate alive in the rule catalog while the infrastructure is being built.

Options

none. Activated only under [experimental] target = "rdna4".

Fix availability

none — Informational note.

See also

• ADR 0018 §4.3
• AMD GPUOpen: Live VGPR Analysis with RGA