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JAB-devandClaude Sonnet 5.5 6ccb8c052e fix(agc): refuse memory-writing 4_4_4_4 merges only where tests can reject pixels
The refusal of a merging shader that writes guest memory under late
tests fired in two cases where the early tests change nothing.

The first was a draw with no depth, stencil or depth-bounds test. Early
tests reject no pixel there, so every write the console makes still
happens. The target merge now carries whether the draw has such a
test, and the refusal applies only then. This adds one byte to the
version 40 merge fields of the recompile request.

The second was any GDS binding, including a shader that only reads GDS.
The refusal now looks for GDS writes, atomics, appends and consumes.

Tests: the depth and stencil decode checks the new flag, and the
static shader key depends on it. A counter-adding shader under late
tests compiles without a test and throws with one. A late-test merge
that reads GDS compiles, and one that adds to GDS throws.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
2026-10-20 19:09:49 +02:00
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