spirv: Fix array length of buffers larger than INT32_MAX.
Like 90a8fb0355
.
fossil-db results:
All Skylake and newer Intel platforms had similar results. (Ice Lake shown)
Instructions in all programs: 141442369 -> 141442363 (-0.0%)
Instructions helped: 1
Cycles in all programs: 9099270231 -> 9099270187 (-0.0%)
Cycles helped: 1
Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17637>
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@ -2647,13 +2647,11 @@ vtn_handle_variables(struct vtn_builder *b, SpvOp opcode,
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/* array_length = max(buffer_size - offset, 0) / stride */
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/* array_length = max(buffer_size - offset, 0) / stride */
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nir_ssa_def *array_length =
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nir_ssa_def *array_length =
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nir_idiv(&b->nb,
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nir_udiv_imm(&b->nb,
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nir_imax(&b->nb,
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nir_usub_sat(&b->nb,
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nir_isub(&b->nb,
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buf_size,
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buf_size,
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nir_imm_int(&b->nb, offset)),
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nir_imm_int(&b->nb, offset)),
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stride);
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nir_imm_int(&b->nb, 0u)),
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nir_imm_int(&b->nb, stride));
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vtn_push_nir_ssa(b, w[2], array_length);
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vtn_push_nir_ssa(b, w[2], array_length);
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}
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}
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