rtlanal.c (label_is_jump_target_p): Return true for a matching REG_LABEL_TARGET.

	* rtlanal.c (label_is_jump_target_p): Return true for a matching
	REG_LABEL_TARGET.
	* reorg.c (fill_slots_from_thread): Correct last change to use
	NULL_RTX, not NULL.  Outside of REG_NOTES loop, increase and
	decrease LABEL_NUSES for JUMP_LABEL (trial), not XEXP (note, 0).
	* jump.c (mark_jump_label_1): Add comment for last change
	regarding JUMP_LABEL setting.
	* gcse.c (add_label_notes): Remove conditional that the label is
	mentioned in insn before adding regnote.
	* sched-rgn.c (is_cfg_nonregular): Don't return 1 for a
	single_set insn only feeding a label to a jump through a
	register that dies there.

From-SVN: r130398

1 files changed, 10 insertions, 12 deletions

diff --git a/gcc/gcse.c b/gcc/gcse.c
index 84c0994..db7e03c 100644
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -4614,18 +4614,16 @@ add_label_notes (rtx x, rtx insn)
 	 We no longer ignore such label references (see LABEL_REF handling in
 	 mark_jump_label for additional information).  */
 
-	if (reg_mentioned_p (XEXP (x, 0), insn))
-	  {
-	    /* There's no reason for current users to emit jump-insns
-	       with such a LABEL_REF, so we don't have to handle
-	       REG_LABEL_TARGET notes.  */
-	    gcc_assert (!JUMP_P (insn));
-	    REG_NOTES (insn)
-	      = gen_rtx_INSN_LIST (REG_LABEL_OPERAND, XEXP (x, 0),
-				   REG_NOTES (insn));
-	    if (LABEL_P (XEXP (x, 0)))
-	      LABEL_NUSES (XEXP (x, 0))++;
-	  }
+      /* There's no reason for current users to emit jump-insns with
+	 such a LABEL_REF, so we don't have to handle REG_LABEL_TARGET
+	 notes.  */
+      gcc_assert (!JUMP_P (insn));
+      REG_NOTES (insn)
+	= gen_rtx_INSN_LIST (REG_LABEL_OPERAND, XEXP (x, 0),
+			     REG_NOTES (insn));
+      if (LABEL_P (XEXP (x, 0)))
+	LABEL_NUSES (XEXP (x, 0))++;
+
       return;
     }