Bootstrapped & regression-tested on x86_64-linux-gnu and aarch64-linux-gnu.
Also tested via config-list.mk.  Committed as preapproved.

Thanks,
Richard


gcc/
        * target-insns.def (jump): New targetm instruction pattern.
        * bb-reorder.c (get_uncond_jump_length): Use targetm.gen_jump
        instead of gen_jump.
        (fix_up_crossing_landing_pad): Likewise.
        (add_labels_and_missing_jumps): Likewise.
        (fix_crossing_conditional_branches): Likewise.
        * cfgrtl.c (try_redirect_by_replacing_jump): Likewise.
        (force_nonfallthru_and_redirect): Likewise.
        * cse.c (cse_insn): Likewise.
        * expmed.c (expand_divmod): Likewise.
        * expr.c (store_expr_with_bounds, expand_expr_real_2): Likewise.
        * haifa-sched.c (init_before_recovery): Likewise.
        (sched_create_recovery_edges): Likewise.
        * ifcvt.c (find_cond_trap): Likewise.
        * optabs.c (expand_doubleword_shift, expand_doubleword_clz): Likewise.
        (expand_float, expand_fix): Likewise.
        * stmt.c (emit_jump): Likewise.

Index: gcc/target-insns.def
===================================================================
--- gcc/target-insns.def        2015-06-30 21:56:48.294898184 +0100
+++ gcc/target-insns.def        2015-06-30 21:56:48.278898365 +0100
@@ -32,6 +32,7 @@
    Instructions should be documented in md.texi rather than here.  */
 DEF_TARGET_INSN (canonicalize_funcptr_for_compare, (rtx x0, rtx x1))
 DEF_TARGET_INSN (epilogue, (void))
+DEF_TARGET_INSN (jump, (rtx x0))
 DEF_TARGET_INSN (load_multiple, (rtx x0, rtx x1, rtx x2))
 DEF_TARGET_INSN (mem_signal_fence, (rtx x0))
 DEF_TARGET_INSN (mem_thread_fence, (rtx x0))
Index: gcc/bb-reorder.c
===================================================================
--- gcc/bb-reorder.c    2015-06-30 21:56:48.294898184 +0100
+++ gcc/bb-reorder.c    2015-06-30 21:56:48.290898228 +0100
@@ -1385,7 +1385,7 @@ get_uncond_jump_length (void)
 
   start_sequence ();
   rtx_code_label *label = emit_label (gen_label_rtx ());
-  rtx_insn *jump = emit_jump_insn (gen_jump (label));
+  rtx_insn *jump = emit_jump_insn (targetm.gen_jump (label));
   length = get_attr_min_length (jump);
   end_sequence ();
 
@@ -1420,7 +1420,7 @@ fix_up_crossing_landing_pad (eh_landing_
   post_bb = BLOCK_FOR_INSN (old_lp->landing_pad);
   post_bb = single_succ (post_bb);
   rtx_code_label *post_label = block_label (post_bb);
-  jump = emit_jump_insn (gen_jump (post_label));
+  jump = emit_jump_insn (targetm.gen_jump (post_label));
   JUMP_LABEL (jump) = post_label;
 
   /* Create new basic block to be dest for lp.  */
@@ -1766,7 +1766,7 @@ add_labels_and_missing_jumps (vec<edge>
       /* Make sure there's only one successor.  */
       gcc_assert (single_succ_p (src));
 
-      new_jump = emit_jump_insn_after (gen_jump (label), BB_END (src));
+      new_jump = emit_jump_insn_after (targetm.gen_jump (label), BB_END (src));
       BB_END (src) = new_jump;
       JUMP_LABEL (new_jump) = label;
       LABEL_NUSES (label) += 1;
@@ -2082,7 +2082,7 @@ fix_crossing_conditional_branches (void)
                  gcc_assert (GET_CODE (old_label) == LABEL_REF);
                  old_jump_target = old_jump_insn->jump_target ();
                  new_jump = as_a <rtx_jump_insn *>
-                               (emit_jump_insn (gen_jump (old_jump_target)));
+                   (emit_jump_insn (targetm.gen_jump (old_jump_target)));
                  new_jump->set_jump_target (old_jump_target);
 
                  last_bb = EXIT_BLOCK_PTR_FOR_FN (cfun)->prev_bb;
Index: gcc/cfgrtl.c
===================================================================
--- gcc/cfgrtl.c        2015-06-30 21:56:48.294898184 +0100
+++ gcc/cfgrtl.c        2015-06-30 21:56:48.290898228 +0100
@@ -1117,7 +1117,7 @@ try_redirect_by_replacing_jump (edge e,
       rtx label;
       rtx_jump_table_data *table;
 
-      emit_jump_insn_after_noloc (gen_jump (target_label), insn);
+      emit_jump_insn_after_noloc (targetm.gen_jump (target_label), insn);
       JUMP_LABEL (BB_END (src)) = target_label;
       LABEL_NUSES (target_label)++;
       if (dump_file)
@@ -1708,7 +1708,8 @@ force_nonfallthru_and_redirect (edge e,
   else
     {
       rtx_code_label *label = block_label (target);
-      emit_jump_insn_after_setloc (gen_jump (label), BB_END (jump_block), loc);
+      emit_jump_insn_after_setloc (targetm.gen_jump (label),
+                                  BB_END (jump_block), loc);
       JUMP_LABEL (BB_END (jump_block)) = label;
       LABEL_NUSES (label)++;
     }
Index: gcc/cse.c
===================================================================
--- gcc/cse.c   2015-06-30 21:56:48.294898184 +0100
+++ gcc/cse.c   2015-06-30 21:56:48.278898365 +0100
@@ -5483,7 +5483,8 @@ cse_insn (rtx_insn *insn)
              rtx_jump_insn *new_rtx;
              rtx note;
 
-             new_rtx = emit_jump_insn_before (gen_jump (XEXP (src, 0)), insn);
+             rtx_insn *seq = targetm.gen_jump (XEXP (src, 0));
+             new_rtx = emit_jump_insn_before (seq, insn);
              JUMP_LABEL (new_rtx) = XEXP (src, 0);
              LABEL_NUSES (XEXP (src, 0))++;
 
Index: gcc/expmed.c
===================================================================
--- gcc/expmed.c        2015-06-30 21:56:48.294898184 +0100
+++ gcc/expmed.c        2015-06-30 21:56:48.278898365 +0100
@@ -4539,11 +4539,11 @@ expand_divmod (int rem_flag, enum tree_c
                              quotient, 0, OPTAB_LIB_WIDEN);
          if (tem != quotient)
            emit_move_insn (quotient, tem);
-         emit_jump_insn (gen_jump (label5));
+         emit_jump_insn (targetm.gen_jump (label5));
          emit_barrier ();
          emit_label (label1);
          expand_inc (adjusted_op0, const1_rtx);
-         emit_jump_insn (gen_jump (label4));
+         emit_jump_insn (targetm.gen_jump (label4));
          emit_barrier ();
          emit_label (label2);
          do_cmp_and_jump (adjusted_op0, const0_rtx, GT, compute_mode, label3);
@@ -4551,7 +4551,7 @@ expand_divmod (int rem_flag, enum tree_c
                              quotient, 0, OPTAB_LIB_WIDEN);
          if (tem != quotient)
            emit_move_insn (quotient, tem);
-         emit_jump_insn (gen_jump (label5));
+         emit_jump_insn (targetm.gen_jump (label5));
          emit_barrier ();
          emit_label (label3);
          expand_dec (adjusted_op0, const1_rtx);
@@ -4645,7 +4645,7 @@ expand_divmod (int rem_flag, enum tree_c
              do_cmp_and_jump (adjusted_op0, const0_rtx, NE,
                               compute_mode, label1);
              emit_move_insn  (quotient, const0_rtx);
-             emit_jump_insn (gen_jump (label2));
+             emit_jump_insn (targetm.gen_jump (label2));
              emit_barrier ();
              emit_label (label1);
              expand_dec (adjusted_op0, const1_rtx);
@@ -4753,11 +4753,11 @@ expand_divmod (int rem_flag, enum tree_c
                                  quotient, 0, OPTAB_LIB_WIDEN);
              if (tem != quotient)
                emit_move_insn (quotient, tem);
-             emit_jump_insn (gen_jump (label5));
+             emit_jump_insn (targetm.gen_jump (label5));
              emit_barrier ();
              emit_label (label1);
              expand_dec (adjusted_op0, const1_rtx);
-             emit_jump_insn (gen_jump (label4));
+             emit_jump_insn (targetm.gen_jump (label4));
              emit_barrier ();
              emit_label (label2);
              do_cmp_and_jump (adjusted_op0, const0_rtx, LT,
@@ -4766,7 +4766,7 @@ expand_divmod (int rem_flag, enum tree_c
                                  quotient, 0, OPTAB_LIB_WIDEN);
              if (tem != quotient)
                emit_move_insn (quotient, tem);
-             emit_jump_insn (gen_jump (label5));
+             emit_jump_insn (targetm.gen_jump (label5));
              emit_barrier ();
              emit_label (label3);
              expand_inc (adjusted_op0, const1_rtx);
Index: gcc/expr.c
===================================================================
--- gcc/expr.c  2015-06-30 21:56:48.294898184 +0100
+++ gcc/expr.c  2015-06-30 21:56:48.286898272 +0100
@@ -5268,7 +5268,7 @@ store_expr_with_bounds (tree exp, rtx ta
       jumpifnot (TREE_OPERAND (exp, 0), lab1, -1);
       store_expr_with_bounds (TREE_OPERAND (exp, 1), target, call_param_p,
                              nontemporal, btarget);
-      emit_jump_insn (gen_jump (lab2));
+      emit_jump_insn (targetm.gen_jump (lab2));
       emit_barrier ();
       emit_label (lab1);
       store_expr_with_bounds (TREE_OPERAND (exp, 2), target, call_param_p,
@@ -9200,7 +9200,7 @@ #define REDUCE_BIT_FIELD(expr)    (reduce_b
                    modifier == EXPAND_STACK_PARM,
                    false);
 
-       emit_jump_insn (gen_jump (lab1));
+       emit_jump_insn (targetm.gen_jump (lab1));
        emit_barrier ();
        emit_label (lab0);
        store_expr (treeop2, temp,
Index: gcc/haifa-sched.c
===================================================================
--- gcc/haifa-sched.c   2015-06-30 21:56:48.294898184 +0100
+++ gcc/haifa-sched.c   2015-06-30 21:56:48.290898228 +0100
@@ -8120,7 +8120,7 @@ init_before_recovery (basic_block *befor
                             EDGE_FALLTHRU);
 
       rtx_code_label *label = block_label (empty);
-      rtx_jump_insn *x = emit_jump_insn_after (gen_jump (label),
+      rtx_jump_insn *x = emit_jump_insn_after (targetm.gen_jump (label),
                                               BB_END (single));
       JUMP_LABEL (x) = label;
       LABEL_NUSES (label)++;
@@ -8198,7 +8198,8 @@ sched_create_recovery_edges (basic_block
 
   make_edge (first_bb, rec, edge_flags);
   rtx_code_label *label = block_label (second_bb);
-  rtx_jump_insn *jump = emit_jump_insn_after (gen_jump (label), BB_END (rec));
+  rtx_jump_insn *jump = emit_jump_insn_after (targetm.gen_jump (label),
+                                             BB_END (rec));
   JUMP_LABEL (jump) = label;
   LABEL_NUSES (label)++;
 
Index: gcc/ifcvt.c
===================================================================
--- gcc/ifcvt.c 2015-06-30 21:56:48.294898184 +0100
+++ gcc/ifcvt.c 2015-06-30 21:56:48.278898365 +0100
@@ -3824,10 +3824,9 @@ find_cond_trap (basic_block test_bb, edg
     single_succ_edge (test_bb)->flags |= EDGE_FALLTHRU;
   else if (trap_bb == then_bb)
     {
-      rtx lab;
-
-      lab = JUMP_LABEL (jump);
-      rtx_jump_insn *newjump = emit_jump_insn_after (gen_jump (lab), jump);
+      rtx lab = JUMP_LABEL (jump);
+      rtx_insn *seq = targetm.gen_jump (lab);
+      rtx_jump_insn *newjump = emit_jump_insn_after (seq, jump);
       LABEL_NUSES (lab) += 1;
       JUMP_LABEL (newjump) = lab;
       emit_barrier_after (newjump);
Index: gcc/optabs.c
===================================================================
--- gcc/optabs.c        2015-06-30 21:56:48.294898184 +0100
+++ gcc/optabs.c        2015-06-30 21:56:48.290898228 +0100
@@ -1110,7 +1110,7 @@ expand_doubleword_shift (machine_mode op
                               unsignedp, methods))
     return false;
 
-  emit_jump_insn (gen_jump (done_label));
+  emit_jump_insn (targetm.gen_jump (done_label));
   emit_barrier ();
   emit_label (subword_label);
 
@@ -2589,7 +2589,7 @@ expand_doubleword_clz (machine_mode mode
   if (temp != result)
     convert_move (result, temp, true);
 
-  emit_jump_insn (gen_jump (after_label));
+  emit_jump_insn (targetm.gen_jump (after_label));
   emit_barrier ();
 
   /* Else clz of the full value is clz of the low word plus the number
@@ -5088,7 +5088,7 @@ expand_float (rtx to, rtx from, int unsi
 
              /* The sign bit is not set.  Convert as signed.  */
              expand_float (target, from, 0);
-             emit_jump_insn (gen_jump (label));
+             emit_jump_insn (targetm.gen_jump (label));
              emit_barrier ();
 
              /* The sign bit is set.
@@ -5293,7 +5293,7 @@ expand_fix (rtx to, rtx from, int unsign
 
          /* If not, do the signed "fix" and branch around fixup code.  */
          expand_fix (to, from, 0);
-         emit_jump_insn (gen_jump (lab2));
+         emit_jump_insn (targetm.gen_jump (lab2));
          emit_barrier ();
 
          /* Otherwise, subtract 2**(N-1), convert to signed number,
Index: gcc/stmt.c
===================================================================
--- gcc/stmt.c  2015-06-30 21:56:48.294898184 +0100
+++ gcc/stmt.c  2015-06-30 21:56:48.278898365 +0100
@@ -172,7 +172,7 @@ jump_target_rtx (tree label)
 emit_jump (rtx label)
 {
   do_pending_stack_adjust ();
-  emit_jump_insn (gen_jump (label));
+  emit_jump_insn (targetm.gen_jump (label));
   emit_barrier ();
 }
 

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