+/* Add COMP_RTX as a condition at end of COND_BB. FIRST_HEAD is
+ the conditional branch target, SECOND_HEAD should be the fall-thru
+ there is no need to handle this here the loop versioning code handles
+ this. the reason for SECON_HEAD is that it is needed for condition
+ in trees, and this should be of the same type since it is a hook. */
+static void
+rtl_lv_add_condition_to_bb (basic_block first_head ,
+ basic_block second_head ATTRIBUTE_UNUSED,
+ basic_block cond_bb, void *comp_rtx)
+{
+ rtx label, seq, jump;
+ rtx op0 = XEXP ((rtx)comp_rtx, 0);
+ rtx op1 = XEXP ((rtx)comp_rtx, 1);
+ enum rtx_code comp = GET_CODE ((rtx)comp_rtx);
+ enum machine_mode mode;
+
+
+ label = block_label (first_head);
+ mode = GET_MODE (op0);
+ if (mode == VOIDmode)
+ mode = GET_MODE (op1);
+
+ start_sequence ();
+ op0 = force_operand (op0, NULL_RTX);
+ op1 = force_operand (op1, NULL_RTX);
+ do_compare_rtx_and_jump (op0, op1, comp, 0,
+ mode, NULL_RTX, NULL_RTX, label);
+ jump = get_last_insn ();
+ JUMP_LABEL (jump) = label;
+ LABEL_NUSES (label)++;
+ seq = get_insns ();
+ end_sequence ();
+
+ /* Add the new cond , in the new head. */
+ emit_insn_after(seq, BB_END(cond_bb));
+}
+
+
+/* Given a block B with unconditional branch at its end, get the
+ store the return the branch edge and the fall-thru edge in
+ BRANCH_EDGE and FALLTHRU_EDGE respectively. */
+static void
+rtl_extract_cond_bb_edges (basic_block b, edge *branch_edge,
+ edge *fallthru_edge)
+{
+ edge e = EDGE_SUCC (b, 0);
+
+ if (e->flags & EDGE_FALLTHRU)
+ {
+ *fallthru_edge = e;
+ *branch_edge = EDGE_SUCC (b, 1);
+ }
+ else
+ {
+ *branch_edge = e;
+ *fallthru_edge = EDGE_SUCC (b, 1);
+ }
+}
+
+