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PR tree-optimization/51074 * fold-const.c (vec_cst_ctor_to_array, fold_vec_perm): New functions. (fold_binary_loc): Handle VEC_EXTRACT_EVEN_EXPR, VEC_EXTRACT_ODD_EXPR, VEC_INTERLEAVE_HIGH_EXPR and VEC_INTERLEAVE_LOW_EXPR with VECTOR_CST or CONSTRUCTOR operands. (fold_ternary_loc): Handle VEC_PERM_EXPR with VECTOR_CST or CONSTRUCTOR operands. * tree-ssa-propagate.c (valid_gimple_rhs_p): Handle ternary expressions. * tree-vect-generic.c (lower_vec_perm): Mask sel_int elements to 0 .. 2 * elements - 1. From-SVN: r181297
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