Samuel Pitoiset
66426ce119
Instead of emitting 1.0 / x which includes a slow division that LLVM doesn't always optimize even if the metadata is correctly set. pipeline-db (VEG10/LLVM 9): Totals from affected shaders: SGPRS: 50384 -> 50312 (-0.14 %) VGPRS: 42572 -> 42696 (0.29 %) Spilled SGPRs: 1372 -> 1372 (0.00 %) Code Size: 5692040 -> 5691428 (-0.01 %) bytes Max Waves: 3954 -> 3951 (-0.08 %) pipeline-db (VEG10/LLVM 10): Totals from affected shaders: SGPRS: 78512 -> 78464 (-0.06 %) VGPRS: 62408 -> 62484 (0.12 %) Spilled SGPRs: 1502 -> 1502 (0.00 %) Code Size: 8106188 -> 8103372 (-0.03 %) bytes Max Waves: 7759 -> 7753 (-0.08 %) pipeline-db (VEGA10/LLVM 11 - 92744f62478): Totals from affected shaders: SGPRS: 112760 -> 113232 (0.42 %) VGPRS: 111132 -> 110568 (-0.51 %) Spilled SGPRs: 5870 -> 5940 (1.19 %) Spilled VGPRs: 650 -> 652 (0.31 %) Code Size: 11887232 -> 11561744 (-2.74 %) bytes Max Waves: 8964 -> 9015 (0.57 %) LLVM 11 (master) is more affected than previous versions, but based on the small impact with LLVM 9/10, I decided to emit it unconditionally. Cc: 20.0 <mesa-stable@lists.freedesktop.org> Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com> Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Reviewed-by: Marek Olšák <marek.olsak@amd.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4326>
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