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* tree-phinode.c (resize_phi_node): Abort when LEN is strictly greater than PHI_ARG_CAPACITY. (reserve_phi_args_for_new_edge): Initialize the new PHI argument to NULL_TREE. Increment PHI_NUM_ARGS. (add_phi_arg): Add a PHI argument to the slot given by E->dest_idx. (remove_phi_arg_num): Do not write to PHI_ARG_EDGE. * tree-flow-inline (phi_arg_from_edge): Return E->dest_idx. * tree-ssa.c (ssa_redirect_edge): Check for a missing PHI argument by looking at PHI_ARG_DEF. (verify_phi_args): Check for a missing PHI argument. Remove the check for duplicate PHI arguments. * tree.h (PHI_ARG_EDGE): Redefine in terms of EDGE_PRED. (phi_arg_d): Remove e. From-SVN: r91097
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