rtl.texi (REG_NOTES): Say that int_list can also be used.

gcc/
	* doc/rtl.texi (REG_NOTES): Say that int_list can also be used.
	(REG_BR_PROB): Say that the probability is stored in an int_list.
	* reg-notes.def: Update commentary to mention INT_LIST.
	* rtl.def (EXPR_LIST, INSN_LIST): Capitalize comments.
	(INT_LIST): New rtx.
	* rtl.h (add_int_reg_note, add_shallow_copy_of_reg_note): Declare.
	* rtlanal.c (int_reg_note_p): New function.
	(alloc_reg_note): Assert that the note does not have an int argument.
	(add_int_reg_note, add_shallow_copy_of_reg_note): New functions.
	* combine.c (distribute_notes): Use add_shallow_copy_of_rtx.
	* cse.c (cse_process_notes_1): Expect REG_EQUAL to be an EXPR_LIST
	rather than an INSN_LIST.  Handle INT_LIST.
	* ifcvt.c (cond_exec_process_insns): Take the probability as an int
	rather than an rtx.  Use gen_rtx_INT_LIST to create a REG_BR_PROB note.
	(cond_exec_process_if_block): Use XINT to extract REG_BR_PROB values.
	Manipulate them as ints rather than rtxes.
	* reg-stack.c (subst_asm_stack_regs): Only handle EXPR_LIST notes.
	* regmove.c (copy_src_to_dest): Likewise.
	* sched-vis.c (print_insn_with_notes): Handle INT_LIST.

	* config/i386/winnt.c (i386_pe_seh_unwind_emit): Sink pat assignment
	into the cases that need it.
	* config/arm/arm.c (arm_unwind_emit): Likewise.

	* asan.c (asan_clear_shadow): Use add_int_reg_note for REG_BR_PROB.
	* emit-rtl.c (try_split, emit_copy_of_insn_after): Likewise.
	* loop-doloop.c (add_test, doloop_modify): Likewise.
	* loop-unswitch.c (compare_and_jump_seq): Likewise.
	* optabs.c (emit_cmp_and_jump_insn_1): Likewise.
	* predict.c (combine_predictions_for_insn): Likewise.
	* print-rtl.c (print_rtx): Handle INT_LIST.
	* config/aarch64/aarch64.c (aarch64_emit_unlikely_jump): Likewise.
	* config/alpha/alpha.c (emit_unlikely_jump): Likewise.
	* config/arm/arm.c (emit_unlikely_jump): Likewise.
	* config/i386/i386.c (ix86_expand_split_stack_prologue): Likewise.
	(ix86_split_fp_branch, predict_jump): Likewise.
	* config/rs6000/rs6000.c (emit_unlikely_jump): Likewise.
	* config/sh/sh.c (expand_cbranchsi4): Likewise.
	* config/spu/spu.c (ea_load_store_inline): Likewise.

	* cfgbuild.c (compute_outgoing_frequencies): Use XINT to access the
	value of a REG_BR_PROB note.
	* cfgrtl.c (force_nonfallthru_and_redirect): Likewise.
	(update_br_prob_note, rtl_verify_edges, purge_dead_edges): Likewise.
	* emit-rtl.c (try_split): Likewise.
	* predict.c (br_prob_note_reliable_p): Likewise.
	(invert_br_probabilities, combine_predictions_for_insn): Likewise.
	* reorg.c (mostly_true_jump): Likewise.
	* config/bfin/bfin.c (cbranch_predicted_taken_p): Likewise.
	* config/frv/frv.c (frv_print_operand_jump_hint): Likewise.
	* config/i386/i386.c (ix86_print_operand): Likewise.
	* config/ia64/ia64.c (ia64_print_operand): Likewise.
	* config/mmix/mmix.c (mmix_print_operand): Likewise.
	* config/rs6000/rs6000.c (output_cbranch): Likewise.
	* config/s390/s390.c (s390_expand_tbegin): Likewise.
	* config/sh/sh.c (sh_print_operand, sh_adjust_cost): Likewise.
	* config/sparc/sparc.c (output_cbranch): Likewise.
	* config/spu/spu.c (get_branch_target): Likewise.
	* config/tilegx/tilegx.c (cbranch_predicted_p): Likewise.
	* config/tilepro/tilepro.c (cbranch_predicted_p): Likewise.

From-SVN: r202839

38 files changed, 213 insertions, 102 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b38c84bc57d..179a3798c6e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,66 @@
+2013-09-23  Richard Sandiford  <rdsandiford@googlemail.com>
+
+	* doc/rtl.texi (REG_NOTES): Say that int_list can also be used.
+	(REG_BR_PROB): Say that the probability is stored in an int_list.
+	* reg-notes.def: Update commentary to mention INT_LIST.
+	* rtl.def (EXPR_LIST, INSN_LIST): Capitalize comments.
+	(INT_LIST): New rtx.
+	* rtl.h (add_int_reg_note, add_shallow_copy_of_reg_note): Declare.
+	* rtlanal.c (int_reg_note_p): New function.
+	(alloc_reg_note): Assert that the note does not have an int argument.
+	(add_int_reg_note, add_shallow_copy_of_reg_note): New functions.
+	* combine.c (distribute_notes): Use add_shallow_copy_of_rtx.
+	* cse.c (cse_process_notes_1): Expect REG_EQUAL to be an EXPR_LIST
+	rather than an INSN_LIST.  Handle INT_LIST.
+	* ifcvt.c (cond_exec_process_insns): Take the probability as an int
+	rather than an rtx.  Use gen_rtx_INT_LIST to create a REG_BR_PROB note.
+	(cond_exec_process_if_block): Use XINT to extract REG_BR_PROB values.
+	Manipulate them as ints rather than rtxes.
+	* reg-stack.c (subst_asm_stack_regs): Only handle EXPR_LIST notes.
+	* regmove.c (copy_src_to_dest): Likewise.
+	* sched-vis.c (print_insn_with_notes): Handle INT_LIST.
+
+	* config/i386/winnt.c (i386_pe_seh_unwind_emit): Sink pat assignment
+	into the cases that need it.
+	* config/arm/arm.c (arm_unwind_emit): Likewise.
+
+	* asan.c (asan_clear_shadow): Use add_int_reg_note for REG_BR_PROB.
+	* emit-rtl.c (try_split, emit_copy_of_insn_after): Likewise.
+	* loop-doloop.c (add_test, doloop_modify): Likewise.
+	* loop-unswitch.c (compare_and_jump_seq): Likewise.
+	* optabs.c (emit_cmp_and_jump_insn_1): Likewise.
+	* predict.c (combine_predictions_for_insn): Likewise.
+	* print-rtl.c (print_rtx): Handle INT_LIST.
+	* config/aarch64/aarch64.c (aarch64_emit_unlikely_jump): Likewise.
+	* config/alpha/alpha.c (emit_unlikely_jump): Likewise.
+	* config/arm/arm.c (emit_unlikely_jump): Likewise.
+	* config/i386/i386.c (ix86_expand_split_stack_prologue): Likewise.
+	(ix86_split_fp_branch, predict_jump): Likewise.
+	* config/rs6000/rs6000.c (emit_unlikely_jump): Likewise.
+	* config/sh/sh.c (expand_cbranchsi4): Likewise.
+	* config/spu/spu.c (ea_load_store_inline): Likewise.
+
+	* cfgbuild.c (compute_outgoing_frequencies): Use XINT to access the
+	value of a REG_BR_PROB note.
+	* cfgrtl.c (force_nonfallthru_and_redirect): Likewise.
+	(update_br_prob_note, rtl_verify_edges, purge_dead_edges): Likewise.
+	* emit-rtl.c (try_split): Likewise.
+	* predict.c (br_prob_note_reliable_p): Likewise.
+	(invert_br_probabilities, combine_predictions_for_insn): Likewise.
+	* reorg.c (mostly_true_jump): Likewise.
+	* config/bfin/bfin.c (cbranch_predicted_taken_p): Likewise.
+	* config/frv/frv.c (frv_print_operand_jump_hint): Likewise.
+	* config/i386/i386.c (ix86_print_operand): Likewise.
+	* config/ia64/ia64.c (ia64_print_operand): Likewise.
+	* config/mmix/mmix.c (mmix_print_operand): Likewise.
+	* config/rs6000/rs6000.c (output_cbranch): Likewise.
+	* config/s390/s390.c (s390_expand_tbegin): Likewise.
+	* config/sh/sh.c (sh_print_operand, sh_adjust_cost): Likewise.
+	* config/sparc/sparc.c (output_cbranch): Likewise.
+	* config/spu/spu.c (get_branch_target): Likewise.
+	* config/tilegx/tilegx.c (cbranch_predicted_p): Likewise.
+	* config/tilepro/tilepro.c (cbranch_predicted_p): Likewise.
+
 2013-09-23  Jan Hubicka  <jh@suse.cz>
 
 	* ipa-cp.c (ipa_get_indirect_edge_target_1): Add sanity check
diff --git a/gcc/asan.c b/gcc/asan.c
index 1397173b3f6..32f183775cd 100644
--- a/gcc/asan.c
+++ b/gcc/asan.c
@@ -908,7 +908,7 @@ asan_clear_shadow (rtx shadow_mem, HOST_WIDE_INT len)
   emit_cmp_and_jump_insns (addr, end, LT, NULL_RTX, Pmode, true, top_label);
   jump = get_last_insn ();
   gcc_assert (JUMP_P (jump));
-  add_reg_note (jump, REG_BR_PROB, GEN_INT (REG_BR_PROB_BASE * 80 / 100));
+  add_int_reg_note (jump, REG_BR_PROB, REG_BR_PROB_BASE * 80 / 100);
 }
 
 /* Insert code to protect stack vars.  The prologue sequence should be emitted
diff --git a/gcc/cfgbuild.c b/gcc/cfgbuild.c
index ac6aefb86df..a9ed5f14b17 100644
--- a/gcc/cfgbuild.c
+++ b/gcc/cfgbuild.c
@@ -542,7 +542,7 @@ compute_outgoing_frequencies (basic_block b)
 
       if (note)
 	{
-	  probability = INTVAL (XEXP (note, 0));
+	  probability = XINT (note, 0);
 	  e = BRANCH_EDGE (b);
 	  e->probability = probability;
 	  e->count = apply_probability (b->count, probability);
diff --git a/gcc/cfgrtl.c b/gcc/cfgrtl.c
index eb6b312d5c8..c82e480ee30 100644
--- a/gcc/cfgrtl.c
+++ b/gcc/cfgrtl.c
@@ -1480,7 +1480,7 @@ force_nonfallthru_and_redirect (edge e, basic_block target, rtx jump_label)
       note = find_reg_note (BB_END (e->src), REG_BR_PROB, NULL_RTX);
       if (note)
 	{
-	  int prob = INTVAL (XEXP (note, 0));
+	  int prob = XINT (note, 0);
 
 	  b->probability = prob;
           /* Update this to use GCOV_COMPUTE_SCALE.  */
@@ -2207,9 +2207,9 @@ update_br_prob_note (basic_block bb)
   if (!JUMP_P (BB_END (bb)))
     return;
   note = find_reg_note (BB_END (bb), REG_BR_PROB, NULL_RTX);
-  if (!note || INTVAL (XEXP (note, 0)) == BRANCH_EDGE (bb)->probability)
+  if (!note || XINT (note, 0) == BRANCH_EDGE (bb)->probability)
     return;
-  XEXP (note, 0) = GEN_INT (BRANCH_EDGE (bb)->probability);
+  XINT (note, 0) = BRANCH_EDGE (bb)->probability;
 }
 
 /* Get the last insn associated with block BB (that includes barriers and
@@ -2399,11 +2399,11 @@ rtl_verify_edges (void)
 	  && EDGE_COUNT (bb->succs) >= 2
 	  && any_condjump_p (BB_END (bb)))
 	{
-	  if (INTVAL (XEXP (note, 0)) != BRANCH_EDGE (bb)->probability
+	  if (XINT (note, 0) != BRANCH_EDGE (bb)->probability
 	      && profile_status != PROFILE_ABSENT)
 	    {
-	      error ("verify_flow_info: REG_BR_PROB does not match cfg %wi %i",
-		     INTVAL (XEXP (note, 0)), BRANCH_EDGE (bb)->probability);
+	      error ("verify_flow_info: REG_BR_PROB does not match cfg %i %i",
+		     XINT (note, 0), BRANCH_EDGE (bb)->probability);
 	      err = 1;
 	    }
 	}
@@ -3104,7 +3104,7 @@ purge_dead_edges (basic_block bb)
 
 	  b = BRANCH_EDGE (bb);
 	  f = FALLTHRU_EDGE (bb);
-	  b->probability = INTVAL (XEXP (note, 0));
+	  b->probability = XINT (note, 0);
 	  f->probability = REG_BR_PROB_BASE - b->probability;
           /* Update these to use GCOV_COMPUTE_SCALE.  */
 	  b->count = bb->count * b->probability / REG_BR_PROB_BASE;
@@ -3735,7 +3735,7 @@ fixup_reorder_chain (void)
 		  rtx note = find_reg_note (bb_end_insn, REG_BR_PROB, 0);
 
 		  if (note
-		      && INTVAL (XEXP (note, 0)) < REG_BR_PROB_BASE / 2
+		      && XINT (note, 0) < REG_BR_PROB_BASE / 2
 		      && invert_jump (bb_end_insn,
 				      (e_fall->dest == EXIT_BLOCK_PTR
 				       ? NULL_RTX
diff --git a/gcc/combine.c b/gcc/combine.c
index 335d3ddd6cd..248a6eeeaa9 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -13677,7 +13677,7 @@ distribute_notes (rtx notes, rtx from_insn, rtx i3, rtx i2, rtx elim_i2,
 	}
 
       if (place2)
-	add_reg_note (place2, REG_NOTE_KIND (note), XEXP (note, 0));
+	add_shallow_copy_of_reg_note (place2, note);
     }
 }
 
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index e8ae20ad3d2..6f4fe36e011 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -7162,10 +7162,10 @@ aarch64_emit_store_exclusive (enum machine_mode mode, rtx bval,
 static void
 aarch64_emit_unlikely_jump (rtx insn)
 {
-  rtx very_unlikely = GEN_INT (REG_BR_PROB_BASE / 100 - 1);
+  int very_unlikely = REG_BR_PROB_BASE / 100 - 1;
 
   insn = emit_jump_insn (insn);
-  add_reg_note (insn, REG_BR_PROB, very_unlikely);
+  add_int_reg_note (insn, REG_BR_PROB, very_unlikely);
 }
 
 /* Expand a compare and swap pattern.  */
diff --git a/gcc/config/alpha/alpha.c b/gcc/config/alpha/alpha.c
index a05c42ad4b7..095b8fc7305 100644
--- a/gcc/config/alpha/alpha.c
+++ b/gcc/config/alpha/alpha.c
@@ -4228,12 +4228,12 @@ alpha_expand_builtin_vector_binop (rtx (*gen) (rtx, rtx, rtx),
 static void
 emit_unlikely_jump (rtx cond, rtx label)
 {
-  rtx very_unlikely = GEN_INT (REG_BR_PROB_BASE / 100 - 1);
+  int very_unlikely = REG_BR_PROB_BASE / 100 - 1;
   rtx x;
 
   x = gen_rtx_IF_THEN_ELSE (VOIDmode, cond, label, pc_rtx);
   x = emit_jump_insn (gen_rtx_SET (VOIDmode, pc_rtx, x));
-  add_reg_note (x, REG_BR_PROB, very_unlikely);
+  add_int_reg_note (x, REG_BR_PROB, very_unlikely);
 }
 
 /* A subroutine of the atomic operation splitters.  Emit a load-locked
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 2166001a1ec..cc3eec767ae 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -26103,13 +26103,14 @@ arm_unwind_emit (FILE * asm_out_file, rtx insn)
 
   for (note = REG_NOTES (insn); note ; note = XEXP (note, 1))
     {
-      pat = XEXP (note, 0);
       switch (REG_NOTE_KIND (note))
 	{
 	case REG_FRAME_RELATED_EXPR:
+	  pat = XEXP (note, 0);
 	  goto found;
 
 	case REG_CFA_REGISTER:
+	  pat = XEXP (note, 0);
 	  if (pat == NULL)
 	    {
 	      pat = PATTERN (insn);
@@ -27028,10 +27029,10 @@ arm_emit_store_exclusive (enum machine_mode mode, rtx bval, rtx rval,
 static void
 emit_unlikely_jump (rtx insn)
 {
-  rtx very_unlikely = GEN_INT (REG_BR_PROB_BASE / 100 - 1);
+  int very_unlikely = REG_BR_PROB_BASE / 100 - 1;
 
   insn = emit_jump_insn (insn);
-  add_reg_note (insn, REG_BR_PROB, very_unlikely);
+  add_int_reg_note (insn, REG_BR_PROB, very_unlikely);
 }
 
 /* Expand a compare and swap pattern.  */
diff --git a/gcc/config/bfin/bfin.c b/gcc/config/bfin/bfin.c
index 18457f8f7b6..558f4c18bef 100644
--- a/gcc/config/bfin/bfin.c
+++ b/gcc/config/bfin/bfin.c
@@ -2438,7 +2438,7 @@ cbranch_predicted_taken_p (rtx insn)
 
   if (x)
     {
-      int pred_val = INTVAL (XEXP (x, 0));
+      int pred_val = XINT (x, 0);
 
       return pred_val >= REG_BR_PROB_BASE / 2;
     }
diff --git a/gcc/config/frv/frv.c b/gcc/config/frv/frv.c
index b0e8c91c93d..376a0bbe7a6 100644
--- a/gcc/config/frv/frv.c
+++ b/gcc/config/frv/frv.c
@@ -2643,7 +2643,7 @@ frv_print_operand_jump_hint (rtx insn)
   rtx note;
   rtx labelref;
   int ret;
-  HOST_WIDE_INT prob = -1;
+  int prob = -1;
   enum { UNKNOWN, BACKWARD, FORWARD } jump_type = UNKNOWN;
 
   gcc_assert (JUMP_P (insn));
@@ -2669,7 +2669,7 @@ frv_print_operand_jump_hint (rtx insn)
 
       else
 	{
-	  prob = INTVAL (XEXP (note, 0));
+	  prob = XINT (note, 0);
 	  ret = ((prob >= (REG_BR_PROB_BASE / 2))
 		 ? FRV_JUMP_LIKELY
 		 : FRV_JUMP_NOT_LIKELY);
@@ -2690,10 +2690,10 @@ frv_print_operand_jump_hint (rtx insn)
 	}
 
       fprintf (stderr,
-	       "%s: uid %ld, %s, probability = %ld, max prob. = %ld, hint = %d\n",
+	       "%s: uid %ld, %s, probability = %d, max prob. = %d, hint = %d\n",
 	       IDENTIFIER_POINTER (DECL_NAME (current_function_decl)),
-	       (long)INSN_UID (insn), direction, (long)prob,
-	       (long)REG_BR_PROB_BASE, ret);
+	       (long)INSN_UID (insn), direction, prob,
+	       REG_BR_PROB_BASE, ret);
     }
 #endif
 
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 0c10e7317ea..b4d40bc650c 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -11511,8 +11511,8 @@ ix86_expand_split_stack_prologue (void)
   JUMP_LABEL (jump_insn) = label;
 
   /* Mark the jump as very likely to be taken.  */
-  add_reg_note (jump_insn, REG_BR_PROB,
-		GEN_INT (REG_BR_PROB_BASE - REG_BR_PROB_BASE / 100));
+  add_int_reg_note (jump_insn, REG_BR_PROB,
+		    REG_BR_PROB_BASE - REG_BR_PROB_BASE / 100);
 
   if (split_stack_fn == NULL_RTX)
     split_stack_fn = gen_rtx_SYMBOL_REF (Pmode, "__morestack");
@@ -14808,7 +14808,7 @@ ix86_print_operand (FILE *file, rtx x, int code)
 	    x = find_reg_note (current_output_insn, REG_BR_PROB, 0);
 	    if (x)
 	      {
-		int pred_val = INTVAL (XEXP (x, 0));
+		int pred_val = XINT (x, 0);
 
 		if (pred_val < REG_BR_PROB_BASE * 45 / 100
 		    || pred_val > REG_BR_PROB_BASE * 55 / 100)
@@ -19454,7 +19454,7 @@ ix86_split_fp_branch (enum rtx_code code, rtx op1, rtx op2,
 		       gen_rtx_IF_THEN_ELSE (VOIDmode,
 					     condition, target1, target2)));
   if (split_branch_probability >= 0)
-    add_reg_note (i, REG_BR_PROB, GEN_INT (split_branch_probability));
+    add_int_reg_note (i, REG_BR_PROB, split_branch_probability);
 }
 
 void
@@ -21961,7 +21961,7 @@ predict_jump (int prob)
 {
   rtx insn = get_last_insn ();
   gcc_assert (JUMP_P (insn));
-  add_reg_note (insn, REG_BR_PROB, GEN_INT (prob));
+  add_int_reg_note (insn, REG_BR_PROB, prob);
 }
 
 /* Helper function for the string operations below.  Dest VARIABLE whether
diff --git a/gcc/config/i386/winnt.c b/gcc/config/i386/winnt.c
index 8cf6b3c527a..58e95a3790b 100644
--- a/gcc/config/i386/winnt.c
+++ b/gcc/config/i386/winnt.c
@@ -1178,10 +1178,10 @@ i386_pe_seh_unwind_emit (FILE *asm_out_file, rtx insn)
 
   for (note = REG_NOTES (insn); note ; note = XEXP (note, 1))
     {
-      pat = XEXP (note, 0);
       switch (REG_NOTE_KIND (note))
 	{
 	case REG_FRAME_RELATED_EXPR:
+	  pat = XEXP (note, 0);
 	  goto found;
 
 	case REG_CFA_DEF_CFA:
@@ -1195,6 +1195,7 @@ i386_pe_seh_unwind_emit (FILE *asm_out_file, rtx insn)
 	  gcc_unreachable ();
 
 	case REG_CFA_ADJUST_CFA:
+	  pat = XEXP (note, 0);
 	  if (pat == NULL)
 	    {
 	      pat = PATTERN (insn);
@@ -1206,6 +1207,7 @@ i386_pe_seh_unwind_emit (FILE *asm_out_file, rtx insn)
 	  break;
 
 	case REG_CFA_OFFSET:
+	  pat = XEXP (note, 0);
 	  if (pat == NULL)
 	    pat = single_set (insn);
 	  seh_cfa_offset (asm_out_file, seh, pat);
diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c
index e12b0809e7d..273cd39065f 100644
--- a/gcc/config/ia64/ia64.c
+++ b/gcc/config/ia64/ia64.c
@@ -5463,7 +5463,7 @@ ia64_print_operand (FILE * file, rtx x, int code)
 	x = find_reg_note (current_output_insn, REG_BR_PROB, 0);
 	if (x)
 	  {
-	    int pred_val = INTVAL (XEXP (x, 0));
+	    int pred_val = XINT (x, 0);
 
 	    /* Guess top and bottom 10% statically predicted.  */
 	    if (pred_val < REG_BR_PROB_BASE / 50
diff --git a/gcc/config/mmix/mmix.c b/gcc/config/mmix/mmix.c
index bd37067dfc4..34b4fea7503 100644
--- a/gcc/config/mmix/mmix.c
+++ b/gcc/config/mmix/mmix.c
@@ -1531,7 +1531,7 @@ mmix_print_operand (FILE *stream, rtx x, int code)
       if (TARGET_BRANCH_PREDICT)
 	{
 	  x = find_reg_note (current_output_insn, REG_BR_PROB, 0);
-	  if (x && INTVAL (XEXP (x, 0)) > REG_BR_PROB_BASE / 2)
+	  if (x && XINT (x, 0) > REG_BR_PROB_BASE / 2)
 	    putc ('P', stream);
 	}
       return;
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 7ff0af907d9..26fb05b1a66 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -17541,7 +17541,7 @@ output_cbranch (rtx op, const char *label, int reversed, rtx insn)
   if (note != NULL_RTX)
     {
       /* PROB is the difference from 50%.  */
-      int prob = INTVAL (XEXP (note, 0)) - REG_BR_PROB_BASE / 2;
+      int prob = XINT (note, 0) - REG_BR_PROB_BASE / 2;
 
       /* Only hint for highly probable/improbable branches on newer
 	 cpus as static prediction overrides processor dynamic
@@ -18147,12 +18147,12 @@ rs6000_emit_minmax (rtx dest, enum rtx_code code, rtx op0, rtx op1)
 static void
 emit_unlikely_jump (rtx cond, rtx label)
 {
-  rtx very_unlikely = GEN_INT (REG_BR_PROB_BASE / 100 - 1);
+  int very_unlikely = REG_BR_PROB_BASE / 100 - 1;
   rtx x;
 
   x = gen_rtx_IF_THEN_ELSE (VOIDmode, cond, label, pc_rtx);
   x = emit_jump_insn (gen_rtx_SET (VOIDmode, pc_rtx, x));
-  add_reg_note (x, REG_BR_PROB, very_unlikely);
+  add_int_reg_note (x, REG_BR_PROB, very_unlikely);
 }
 
 /* A subroutine of the atomic operation splitters.  Emit a load-locked
diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c
index 1ea52af0f2b..3bb70f48502 100644
--- a/gcc/config/s390/s390.c
+++ b/gcc/config/s390/s390.c
@@ -9589,7 +9589,7 @@ s390_expand_tbegin (rtx dest, rtx tdb, rtx retry, bool clobber_fprs_p)
   rtx retry_reg = gen_reg_rtx (SImode);
   rtx retry_label = NULL_RTX;
   rtx jump;
-  rtx very_unlikely = GEN_INT (REG_BR_PROB_BASE / 100 - 1);
+  int very_unlikely = REG_BR_PROB_BASE / 100 - 1;
 
   if (retry != NULL_RTX)
     {
@@ -9612,7 +9612,7 @@ s390_expand_tbegin (rtx dest, rtx tdb, rtx retry, bool clobber_fprs_p)
 
   JUMP_LABEL (jump) = abort_label;
   LABEL_NUSES (abort_label) = 1;
-  add_reg_note (jump, REG_BR_PROB, very_unlikely);
+  add_int_reg_note (jump, REG_BR_PROB, very_unlikely);
 
   /* Initialize CC return value.  */
   emit_move_insn (dest, const0_rtx);
@@ -9632,7 +9632,7 @@ s390_expand_tbegin (rtx dest, rtx tdb, rtx retry, bool clobber_fprs_p)
 			       gen_rtx_REG (CCRAWmode, CC_REGNUM),
 			       gen_rtx_CONST_INT (VOIDmode, CC1 | CC3)));
       LABEL_NUSES (leave_label) = 2;
-      add_reg_note (jump, REG_BR_PROB, very_unlikely);
+      add_int_reg_note (jump, REG_BR_PROB, very_unlikely);
 
       /* CC2 - transient failure. Perform retry with ppa.  */
       emit_move_insn (count, retry);
diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c
index 60f45452036..e603e740cd0 100644
--- a/gcc/config/sh/sh.c
+++ b/gcc/config/sh/sh.c
@@ -1146,7 +1146,7 @@ sh_print_operand (FILE *stream, rtx x, int code)
       {
 	rtx note = find_reg_note (current_output_insn, REG_BR_PROB, 0);
 
-	if (note && INTVAL (XEXP (note, 0)) * 2 < REG_BR_PROB_BASE)
+	if (note && XINT (note, 0) * 2 < REG_BR_PROB_BASE)
 	  fputs ("/u", stream);
 	break;
       }
@@ -2082,7 +2082,7 @@ expand_cbranchsi4 (rtx *operands, enum rtx_code comparison, int probability)
 					  operands[1], operands[2])));
   rtx jump = emit_jump_insn (branch_expander (operands[3]));
   if (probability >= 0)
-    add_reg_note (jump, REG_BR_PROB, GEN_INT (probability));
+    add_int_reg_note (jump, REG_BR_PROB, probability);
 }
 
 /* ??? How should we distribute probabilities when more than one branch
@@ -10741,8 +10741,7 @@ sh_adjust_cost (rtx insn, rtx link ATTRIBUTE_UNUSED, rtx dep_insn, int cost)
 	    {
 	      int orig_cost = cost;
 	      rtx note = find_reg_note (insn, REG_BR_PROB, 0);
-	      rtx target = ((! note
-			     || INTVAL (XEXP (note, 0)) * 2 < REG_BR_PROB_BASE)
+	      rtx target = ((!note || XINT (note, 0) * 2 < REG_BR_PROB_BASE)
 			    ? insn : JUMP_LABEL (insn));
 	      /* On the likely path, the branch costs 1, on the unlikely path,
 		 it costs 3.  */
diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c
index e5b4662512d..e9b2bcf5aac 100644
--- a/gcc/config/sparc/sparc.c
+++ b/gcc/config/sparc/sparc.c
@@ -7724,7 +7724,7 @@ output_cbranch (rtx op, rtx dest, int label, int reversed, int annul,
       if (*labelno && insn && (note = find_reg_note (insn, REG_BR_PROB, NULL_RTX)))
 	{
 	  strcpy (p,
-		  ((INTVAL (XEXP (note, 0)) >= REG_BR_PROB_BASE / 2) ^ far)
+		  ((XINT (note, 0) >= REG_BR_PROB_BASE / 2) ^ far)
 		  ? ",pt" : ",pn");
 	  p += 3;
 	  spaces -= 3;
@@ -8195,7 +8195,7 @@ output_v9branch (rtx op, rtx dest, int reg, int label, int reversed,
   if (insn && (note = find_reg_note (insn, REG_BR_PROB, NULL_RTX)))
     {
       strcpy (p,
-	      ((INTVAL (XEXP (note, 0)) >= REG_BR_PROB_BASE / 2) ^ far)
+	      ((XINT (note, 0) >= REG_BR_PROB_BASE / 2) ^ far)
 	      ? ",pt" : ",pn");
       p += 3;
     }
diff --git a/gcc/config/spu/spu.c b/gcc/config/spu/spu.c
index 6cbd3f82337..c32e48a6fc2 100644
--- a/gcc/config/spu/spu.c
+++ b/gcc/config/spu/spu.c
@@ -2197,7 +2197,7 @@ get_branch_target (rtx branch)
 	    {
 	      /* If the more probable case is not a fall through, then
 	         try a branch hint.  */
-	      HOST_WIDE_INT prob = INTVAL (XEXP (note, 0));
+	      int prob = XINT (note, 0);
 	      if (prob > (REG_BR_PROB_BASE * 6 / 10)
 		  && GET_CODE (XEXP (src, 1)) != PC)
 		lab = XEXP (src, 1);
@@ -4342,7 +4342,7 @@ ea_load_store_inline (rtx mem, bool is_store, rtx ea_addr, rtx data_addr)
 							    hit_ref, pc_rtx)));
   /* Say that this branch is very likely to happen.  */
   v = REG_BR_PROB_BASE - REG_BR_PROB_BASE / 100 - 1;
-  add_reg_note (insn, REG_BR_PROB, GEN_INT (v));
+  add_int_reg_note (insn, REG_BR_PROB, v);
 
   ea_load_store (mem, is_store, ea_addr, data_addr);
   cont_label = gen_label_rtx ();
diff --git a/gcc/config/tilegx/tilegx.c b/gcc/config/tilegx/tilegx.c
index beb1012cf2c..35d38c62502 100644
--- a/gcc/config/tilegx/tilegx.c
+++ b/gcc/config/tilegx/tilegx.c
@@ -2529,7 +2529,7 @@ cbranch_predicted_p (rtx insn)
 
   if (x)
     {
-      int pred_val = INTVAL (XEXP (x, 0));
+      int pred_val = XINT (x, 0);
 
       return pred_val >= REG_BR_PROB_BASE / 2;
     }
diff --git a/gcc/config/tilepro/tilepro.c b/gcc/config/tilepro/tilepro.c
index 59618e4384b..35384ef16f0 100644
--- a/gcc/config/tilepro/tilepro.c
+++ b/gcc/config/tilepro/tilepro.c
@@ -2411,7 +2411,7 @@ cbranch_predicted_p (rtx insn)
 
   if (x)
     {
-      int pred_val = INTVAL (XEXP (x, 0));
+      int pred_val = XINT (x, 0);
 
       return pred_val >= REG_BR_PROB_BASE / 2;
     }
diff --git a/gcc/cse.c b/gcc/cse.c
index 664a963f1ac..4b23de1ebe0 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -6068,9 +6068,12 @@ cse_process_notes_1 (rtx x, rtx object, bool *changed)
       return x;
 
     case EXPR_LIST:
-    case INSN_LIST:
       if (REG_NOTE_KIND (x) == REG_EQUAL)
 	XEXP (x, 0) = cse_process_notes (XEXP (x, 0), NULL_RTX, changed);
+      /* Fall through.  */
+
+    case INSN_LIST:
+    case INT_LIST:
       if (XEXP (x, 1))
 	XEXP (x, 1) = cse_process_notes (XEXP (x, 1), NULL_RTX, changed);
       return x;
diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi
index 1d6222382b8..84c0444ad9c 100644
--- a/gcc/doc/rtl.texi
+++ b/gcc/doc/rtl.texi
@@ -3732,8 +3732,8 @@ Def-use and use-def chains are now preferred.
 
 @findex REG_NOTES
 @item REG_NOTES (@var{i})
-A list (chain of @code{expr_list} and @code{insn_list} expressions)
-giving miscellaneous information about the insn.  It is often
+A list (chain of @code{expr_list}, @code{insn_list} and @code{int_list}
+expressions) giving miscellaneous information about the insn.  It is often
 information pertaining to the registers used in this insn.
 @end table
 
@@ -3752,10 +3752,10 @@ analysis pass adds a link to insns which store into registers values
 that are used for the first time in this insn.
 
 The @code{REG_NOTES} field of an insn is a chain similar to the
-@code{LOG_LINKS} field but it includes @code{expr_list} expressions in
-addition to @code{insn_list} expressions.  There are several kinds of
-register notes, which are distinguished by the machine mode, which in a
-register note is really understood as being an @code{enum reg_note}.
+@code{LOG_LINKS} field but it includes @code{expr_list} and @code{int_list}
+expressions in addition to @code{insn_list} expressions.  There are several
+kinds of register notes, which are distinguished by the machine mode, which
+in a register note is really understood as being an @code{enum reg_note}.
 The first operand @var{op} of the note is data whose meaning depends on
 the kind of note.
 
@@ -3956,16 +3956,16 @@ This indicates an anti dependence (a write after read dependence).
 @end table
 
 These notes describe information gathered from gcov profile data.  They
-are stored in the @code{REG_NOTES} field of an insn as an
-@code{expr_list}.
+are stored in the @code{REG_NOTES} field of an insn.
 
 @table @code
 @findex REG_BR_PROB
 @item REG_BR_PROB
 This is used to specify the ratio of branches to non-branches of a
-branch insn according to the profile data.  The value is stored as a
-value between 0 and REG_BR_PROB_BASE; larger values indicate a higher
-probability that the branch will be taken.
+branch insn according to the profile data.  The note is represented
+as an @code{int_list} expression whose integer value is between 0 and
+REG_BR_PROB_BASE.  Larger values indicate a higher probability that
+the branch will be taken.
 
 @findex REG_BR_PRED
 @item REG_BR_PRED
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 8a7b8a563d5..a7ac1276b54 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -3461,7 +3461,7 @@ try_split (rtx pat, rtx trial, int last)
 
   if (any_condjump_p (trial)
       && (note = find_reg_note (trial, REG_BR_PROB, 0)))
-    split_branch_probability = INTVAL (XEXP (note, 0));
+    split_branch_probability = XINT (note, 0);
   probability = split_branch_probability;
 
   seq = split_insns (pat, trial);
@@ -3512,7 +3512,7 @@ try_split (rtx pat, rtx trial, int last)
 		 is responsible for this step using
 		 split_branch_probability variable.  */
 	      gcc_assert (njumps == 1);
-	      add_reg_note (insn, REG_BR_PROB, GEN_INT (probability));
+	      add_int_reg_note (insn, REG_BR_PROB, probability);
 	    }
 	}
     }
@@ -5968,7 +5968,7 @@ emit_copy_of_insn_after (rtx insn, rtx after)
 	  add_reg_note (new_rtx, REG_NOTE_KIND (link),
 			copy_insn_1 (XEXP (link, 0)));
 	else
-	  add_reg_note (new_rtx, REG_NOTE_KIND (link), XEXP (link, 0));
+	  add_shallow_copy_of_reg_note (new_rtx, link);
       }
 
   INSN_CODE (new_rtx) = INSN_CODE (insn);
diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c
index ebc4f1c3e54..747fab9cabc 100644
--- a/gcc/ifcvt.c
+++ b/gcc/ifcvt.c
@@ -91,7 +91,7 @@ static rtx last_active_insn (basic_block, int);
 static rtx find_active_insn_before (basic_block, rtx);
 static rtx find_active_insn_after (basic_block, rtx);
 static basic_block block_fallthru (basic_block);
-static int cond_exec_process_insns (ce_if_block_t *, rtx, rtx, rtx, rtx, int);
+static int cond_exec_process_insns (ce_if_block_t *, rtx, rtx, rtx, int, int);
 static rtx cond_exec_get_condition (rtx);
 static rtx noce_get_condition (rtx, rtx *, bool);
 static int noce_operand_ok (const_rtx);
@@ -316,7 +316,7 @@ cond_exec_process_insns (ce_if_block_t *ce_info ATTRIBUTE_UNUSED,
 			 /* if block information */rtx start,
 			 /* first insn to look at */rtx end,
 			 /* last insn to look at */rtx test,
-			 /* conditional execution test */rtx prob_val,
+			 /* conditional execution test */int prob_val,
 			 /* probability of branch taken. */int mod_ok)
 {
   int must_be_last = FALSE;
@@ -387,10 +387,10 @@ cond_exec_process_insns (ce_if_block_t *ce_info ATTRIBUTE_UNUSED,
 
       validate_change (insn, &PATTERN (insn), pattern, 1);
 
-      if (CALL_P (insn) && prob_val)
+      if (CALL_P (insn) && prob_val >= 0)
 	validate_change (insn, &REG_NOTES (insn),
-			 alloc_EXPR_LIST (REG_BR_PROB, prob_val,
-					  REG_NOTES (insn)), 1);
+			 gen_rtx_INT_LIST ((enum machine_mode) REG_BR_PROB,
+					   prob_val, REG_NOTES (insn)), 1);
 
     insn_done:
       if (insn == end)
@@ -449,14 +449,15 @@ cond_exec_process_if_block (ce_if_block_t * ce_info,
   int then_mod_ok;		/* whether conditional mods are ok in THEN */
   rtx true_expr;		/* test for else block insns */
   rtx false_expr;		/* test for then block insns */
-  rtx true_prob_val;		/* probability of else block */
-  rtx false_prob_val;		/* probability of then block */
+  int true_prob_val;		/* probability of else block */
+  int false_prob_val;		/* probability of then block */
   rtx then_last_head = NULL_RTX;	/* Last match at the head of THEN */
   rtx else_last_head = NULL_RTX;	/* Last match at the head of ELSE */
   rtx then_first_tail = NULL_RTX;	/* First match at the tail of THEN */
   rtx else_first_tail = NULL_RTX;	/* First match at the tail of ELSE */
   int then_n_insns, else_n_insns, n_insns;
   enum rtx_code false_code;
+  rtx note;
 
   /* If test is comprised of && or || elements, and we've failed at handling
      all of them together, just use the last test if it is the special case of
@@ -588,14 +589,17 @@ cond_exec_process_if_block (ce_if_block_t * ce_info,
     goto fail;
 #endif
 
-  true_prob_val = find_reg_note (BB_END (test_bb), REG_BR_PROB, NULL_RTX);
-  if (true_prob_val)
+  note = find_reg_note (BB_END (test_bb), REG_BR_PROB, NULL_RTX);
+  if (note)
     {
-      true_prob_val = XEXP (true_prob_val, 0);
-      false_prob_val = GEN_INT (REG_BR_PROB_BASE - INTVAL (true_prob_val));
+      true_prob_val = XINT (note, 0);
+      false_prob_val = REG_BR_PROB_BASE - true_prob_val;
     }
   else
-    false_prob_val = NULL_RTX;
+    {
+      true_prob_val = -1;
+      false_prob_val = -1;
+    }
 
   /* If we have && or || tests, do them here.  These tests are in the adjacent
      blocks after the first block containing the test.  */
@@ -4113,15 +4117,14 @@ dead_or_predicable (basic_block test_bb, basic_block merge_bb,
 	 All that's left is making sure the insns involved can actually
 	 be predicated.  */
 
-      rtx cond, prob_val;
+      rtx cond;
 
       cond = cond_exec_get_condition (jump);
       if (! cond)
 	return FALSE;
 
-      prob_val = find_reg_note (jump, REG_BR_PROB, NULL_RTX);
-      if (prob_val)
-	prob_val = XEXP (prob_val, 0);
+      rtx note = find_reg_note (jump, REG_BR_PROB, NULL_RTX);
+      int prob_val = (note ? XINT (note, 0) : -1);
 
       if (reversep)
 	{
@@ -4130,8 +4133,8 @@ dead_or_predicable (basic_block test_bb, basic_block merge_bb,
 	    return FALSE;
 	  cond = gen_rtx_fmt_ee (rev, GET_MODE (cond), XEXP (cond, 0),
 			         XEXP (cond, 1));
-	  if (prob_val)
-	    prob_val = GEN_INT (REG_BR_PROB_BASE - INTVAL (prob_val));
+	  if (prob_val >= 0)
+	    prob_val = REG_BR_PROB_BASE - prob_val;
 	}
 
       if (cond_exec_process_insns (NULL, head, end, cond, prob_val, 0)
diff --git a/gcc/loop-doloop.c b/gcc/loop-doloop.c
index b47901b69b7..3b86f841fc9 100644
--- a/gcc/loop-doloop.c
+++ b/gcc/loop-doloop.c
@@ -381,7 +381,7 @@ add_test (rtx cond, edge *e, basic_block dest)
   JUMP_LABEL (jump) = label;
 
   /* The jump is supposed to handle an unlikely special case.  */
-  add_reg_note (jump, REG_BR_PROB, const0_rtx);
+  add_int_reg_note (jump, REG_BR_PROB, 0);
 
   LABEL_NUSES (label)++;
 
@@ -594,8 +594,7 @@ doloop_modify (struct loop *loop, struct niter_desc *desc,
   if (true_prob_val)
     {
       /* Seems safer to use the branch probability.  */
-      add_reg_note (jump_insn, REG_BR_PROB,
-		    GEN_INT (desc->in_edge->probability));
+      add_int_reg_note (jump_insn, REG_BR_PROB, desc->in_edge->probability);
     }
 }
 
diff --git a/gcc/loop-unswitch.c b/gcc/loop-unswitch.c
index 213e74d515a..23057d8694b 100644
--- a/gcc/loop-unswitch.c
+++ b/gcc/loop-unswitch.c
@@ -126,7 +126,7 @@ compare_and_jump_seq (rtx op0, rtx op1, enum rtx_code comp, rtx label, int prob,
       JUMP_LABEL (jump) = label;
       LABEL_NUSES (label)++;
     }
-  add_reg_note (jump, REG_BR_PROB, GEN_INT (prob));
+  add_int_reg_note (jump, REG_BR_PROB, prob);
 
   seq = get_insns ();
   end_sequence ();
diff --git a/gcc/optabs.c b/gcc/optabs.c
index 1d0659e1361..3238885c187 100644
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -4288,7 +4288,7 @@ emit_cmp_and_jump_insn_1 (rtx test, enum machine_mode mode, rtx label, int prob)
       && JUMP_P (insn)
       && any_condjump_p (insn)
       && !find_reg_note (insn, REG_BR_PROB, 0))
-    add_reg_note (insn, REG_BR_PROB, GEN_INT (prob));
+    add_int_reg_note (insn, REG_BR_PROB, prob);
 }
 
 /* Generate code to compare X with Y so that the condition codes are
diff --git a/gcc/predict.c b/gcc/predict.c
index 3b275d0afdb..aa66ecdbbdb 100644
--- a/gcc/predict.c
+++ b/gcc/predict.c
@@ -528,7 +528,7 @@ bool
 br_prob_note_reliable_p (const_rtx note)
 {
   gcc_assert (REG_NOTE_KIND (note) == REG_BR_PROB);
-  return probability_reliable_p (INTVAL (XEXP (note, 0)));
+  return probability_reliable_p (XINT (note, 0));
 }
 
 static void
@@ -682,7 +682,7 @@ invert_br_probabilities (rtx insn)
 
   for (note = REG_NOTES (insn); note; note = XEXP (note, 1))
     if (REG_NOTE_KIND (note) == REG_BR_PROB)
-      XEXP (note, 0) = GEN_INT (REG_BR_PROB_BASE - INTVAL (XEXP (note, 0)));
+      XINT (note, 0) = REG_BR_PROB_BASE - XINT (note, 0);
     else if (REG_NOTE_KIND (note) == REG_BR_PRED)
       XEXP (XEXP (note, 0), 1)
 	= GEN_INT (REG_BR_PROB_BASE - INTVAL (XEXP (XEXP (note, 0), 1)));
@@ -836,7 +836,7 @@ combine_predictions_for_insn (rtx insn, basic_block bb)
 
   if (!prob_note)
     {
-      add_reg_note (insn, REG_BR_PROB, GEN_INT (combined_probability));
+      add_int_reg_note (insn, REG_BR_PROB, combined_probability);
 
       /* Save the prediction into CFG in case we are seeing non-degenerated
 	 conditional jump.  */
@@ -849,7 +849,7 @@ combine_predictions_for_insn (rtx insn, basic_block bb)
     }
   else if (!single_succ_p (bb))
     {
-      int prob = INTVAL (XEXP (prob_note, 0));
+      int prob = XINT (prob_note, 0);
 
       BRANCH_EDGE (bb)->probability = prob;
       FALLTHRU_EDGE (bb)->probability = REG_BR_PROB_BASE - prob;
diff --git a/gcc/print-rtl.c b/gcc/print-rtl.c
index d2bda9ec84c..a1ba0dcc71e 100644
--- a/gcc/print-rtl.c
+++ b/gcc/print-rtl.c
@@ -150,7 +150,8 @@ print_rtx (const_rtx in_rtx)
 
       /* Print REG_NOTE names for EXPR_LIST and INSN_LIST.  */
       if ((GET_CODE (in_rtx) == EXPR_LIST
-	   || GET_CODE (in_rtx) == INSN_LIST)
+	   || GET_CODE (in_rtx) == INSN_LIST
+	   || GET_CODE (in_rtx) == INT_LIST)
 	  && (int)GET_MODE (in_rtx) < REG_NOTE_MAX)
 	fprintf (outfile, ":%s",
 		 GET_REG_NOTE_NAME (GET_MODE (in_rtx)));
diff --git a/gcc/reg-notes.def b/gcc/reg-notes.def
index 3b1d27ca8a7..fd7e337c2d6 100644
--- a/gcc/reg-notes.def
+++ b/gcc/reg-notes.def
@@ -18,9 +18,9 @@ along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
 /* This file defines all the codes that may appear on individual
-   EXPR_LIST rtxes in the REG_NOTES chain of an insn.  The codes are
-   stored in the mode field of the EXPR_LIST.  Source files define
-   DEF_REG_NOTE appropriately before including this file.  */
+   EXPR_LIST, INSN_LIST and INT_LIST rtxes in the REG_NOTES chain of an insn.
+   The codes are stored in the mode field of the rtx.  Source files
+   define DEF_REG_NOTE appropriately before including this file.  */
 
 /* Shorthand.  */
 #define REG_NOTE(NAME) DEF_REG_NOTE (REG_##NAME)
@@ -94,9 +94,9 @@ REG_NOTE (DEP_ANTI)
 REG_NOTE (DEP_CONTROL)
 
 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.  It has an
-   integer value.  For jumps, it is the probability that this is a
-   taken branch.  For calls, it is the probability that this call
-   won't return.  */
+   integer value (in an INT_LIST).  For jumps, it is the probability
+   that this is a taken branch.  For calls, it is the probability that
+   this call won't return.  */
 REG_NOTE (BR_PROB)
 
 /* Attached to a call insn; indicates that the call is malloc-like and
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c
index b3574e66d17..69c05b62ad4 100644
--- a/gcc/reg-stack.c
+++ b/gcc/reg-stack.c
@@ -2058,6 +2058,8 @@ subst_asm_stack_regs (rtx insn, stack_ptr regstack)
   n_notes = 0;
   for (note = REG_NOTES (insn); note; note = XEXP (note, 1))
     {
+      if (GET_CODE (note) != EXPR_LIST)
+	continue;
       rtx reg = XEXP (note, 0);
       rtx *loc = & XEXP (note, 0);
 
diff --git a/gcc/regmove.c b/gcc/regmove.c
index e579a7a234d..c8686d36aec 100644
--- a/gcc/regmove.c
+++ b/gcc/regmove.c
@@ -652,7 +652,7 @@ copy_src_to_dest (rtx insn, rtx src, rtx dest)
       for (link = REG_NOTES (insn); link != NULL_RTX; link = next)
 	{
 	  next = XEXP (link, 1);
-	  if (XEXP (link, 0) == src)
+	  if (GET_CODE (link) == EXPR_LIST && XEXP (link, 0) == src)
 	    {
 	      *p_move_notes = link;
 	      p_move_notes = &XEXP (link, 1);
diff --git a/gcc/reorg.c b/gcc/reorg.c
index d39cc7d8a4a..e65cbf7e54b 100644
--- a/gcc/reorg.c
+++ b/gcc/reorg.c
@@ -876,7 +876,7 @@ mostly_true_jump (rtx jump_insn)
   rtx note = find_reg_note (jump_insn, REG_BR_PROB, 0);
   if (note)
     {
-      int prob = INTVAL (XEXP (note, 0));
+      int prob = XINT (note, 0);
 
       if (prob >= REG_BR_PROB_BASE * 9 / 10)
 	return 2;
diff --git a/gcc/rtl.def b/gcc/rtl.def
index b4ce1b99f3f..15a997b8c25 100644
--- a/gcc/rtl.def
+++ b/gcc/rtl.def
@@ -95,13 +95,16 @@ DEF_RTL_EXPR(DEBUG_EXPR, "debug_expr", "0", RTX_OBJ)
    Expressions used in constructing lists.
    --------------------------------------------------------------------- */
 
-/* a linked list of expressions */
+/* A linked list of expressions.  */
 DEF_RTL_EXPR(EXPR_LIST, "expr_list", "ee", RTX_EXTRA)
 
-/* a linked list of instructions.
+/* A linked list of instructions.
    The insns are represented in print by their uids.  */
 DEF_RTL_EXPR(INSN_LIST, "insn_list", "ue", RTX_EXTRA)
 
+/* A linked list of integers.  */
+DEF_RTL_EXPR(INT_LIST, "int_list", "ie", RTX_EXTRA)
+
 /* SEQUENCE is used in late passes of the compiler to group insns for
    one reason or another.
 
diff --git a/gcc/rtl.h b/gcc/rtl.h
index b5bfdffebc1..f7e5cffa08d 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -2055,6 +2055,8 @@ extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
 extern void add_reg_note (rtx, enum reg_note, rtx);
+extern void add_int_reg_note (rtx, enum reg_note, int);
+extern void add_shallow_copy_of_reg_note (rtx, rtx);
 extern void remove_note (rtx, const_rtx);
 extern void remove_reg_equal_equiv_notes (rtx);
 extern void remove_reg_equal_equiv_notes_for_regno (unsigned int);
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index c15037e9645..554a44c4d9c 100644
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -1923,6 +1923,14 @@ find_regno_fusage (const_rtx insn, enum rtx_code code, unsigned int regno)
 }
 
 
+/* Return true if KIND is an integer REG_NOTE.  */
+
+static bool
+int_reg_note_p (enum reg_note kind)
+{
+  return kind == REG_BR_PROB;
+}
+
 /* Allocate a register note with kind KIND and datum DATUM.  LIST is
    stored as the pointer to the next register note.  */
 
@@ -1931,6 +1939,7 @@ alloc_reg_note (enum reg_note kind, rtx datum, rtx list)
 {
   rtx note;
 
+  gcc_checking_assert (!int_reg_note_p (kind));
   switch (kind)
     {
     case REG_CC_SETTER:
@@ -1961,6 +1970,27 @@ add_reg_note (rtx insn, enum reg_note kind, rtx datum)
   REG_NOTES (insn) = alloc_reg_note (kind, datum, REG_NOTES (insn));
 }
 
+/* Add an integer register note with kind KIND and datum DATUM to INSN.  */
+
+void
+add_int_reg_note (rtx insn, enum reg_note kind, int datum)
+{
+  gcc_checking_assert (int_reg_note_p (kind));
+  REG_NOTES (insn) = gen_rtx_INT_LIST ((enum machine_mode) kind,
+				       datum, REG_NOTES (insn));
+}
+
+/* Add a register note like NOTE to INSN.  */
+
+void
+add_shallow_copy_of_reg_note (rtx insn, rtx note)
+{
+  if (GET_CODE (note) == INT_LIST)
+    add_int_reg_note (insn, REG_NOTE_KIND (note), XINT (note, 0));
+  else
+    add_reg_note (insn, REG_NOTE_KIND (note), XEXP (note, 0));
+}
+
 /* Remove register note NOTE from the REG_NOTES of INSN.  */
 
 void
diff --git a/gcc/sched-vis.c b/gcc/sched-vis.c
index eb2410cbc4f..a965c4d54d6 100644
--- a/gcc/sched-vis.c
+++ b/gcc/sched-vis.c
@@ -751,7 +751,10 @@ print_insn_with_notes (pretty_printer *pp, const_rtx x)
       {
 	pp_printf (pp, "%s      %s ", print_rtx_head,
 		   GET_REG_NOTE_NAME (REG_NOTE_KIND (note)));
-	print_pattern (pp, XEXP (note, 0), 1);
+	if (GET_CODE (note) == INT_LIST)
+	  pp_printf (pp, "%d", XINT (note, 0));
+	else
+	  print_pattern (pp, XEXP (note, 0), 1);
 	pp_newline (pp);
       }
 }