2ac3e921e3
Change NGG GS emit vertex code to emit combined shared stores, also change the export vertex code to emit combined shared loads. This results in more optimal code generation, ie. fewer LDS instructions are generated. GS vertices are stored using an odd stride to minimize the chance of bank conflicts, which means that unfortunately we still can't use an alignment higher than 4 here, so the best we can get are some ds_read2_b32 instructions. Fossil DB stats on Navi 21 (formerly Sienna Cichlid): Totals from 135 (0.10% of 128653) affected shaders: VGPRs: 6416 -> 6512 (+1.50%) CodeSize: 529436 -> 503792 (-4.84%) MaxWaves: 2952 -> 2924 (-0.95%) Instrs: 93384 -> 90176 (-3.44%) Latency: 290283 -> 293611 (+1.15%); split: -0.36%, +1.50% InvThroughput: 81218 -> 82598 (+1.70%) Copies: 6603 -> 6606 (+0.05%) PreVGPRs: 5037 -> 5076 (+0.77%) Signed-off-by: Timur Kristóf <timur.kristof@gmail.com> Reviewed-by: Daniel Schürmann <daniel@schuermann.dev> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11425>
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