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557d4918ad
Vector indexing on matrixes generates several copy of the constant matrix, for instance vec=mat4[i][j] generates : vec=mat4[i].x; vec=(j==1)?mat4[i].y; vec=(j==2)?mat4[i].z; vec=(j==3)?mat4[i].w; In the case of constant matrixes, the mat4[i] expression generates copy of the 16 elements of the matrix 4 times ; indirect addressing also prevents some conservative CSE algorithms (like the one in LLVM) from factoring the mat4[i] expression. This patch will make the vec_index_to_cond pass generates : temp = mat4[i]; vec=temp.x; vec=(j==1)?temp.y; vec=(j==2)?temp.z; vec=(j==3)?temp.w; Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> |
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