From: Richard Kenner <kenner@gcc.gnu.org>
Date: Fri, 9 Jun 1995 22:05:54 +0000 (-0400)
Subject: (cse_basic_block): Fix test for whether block ends with a barrier.
X-Git-Tag: misc/cutover-egcs-0~4042
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=146135d6db182282472ae6bf16b051128c0db85b;p=thirdparty%2Fgcc.git

(cse_basic_block): Fix test for whether block ends with a barrier.

Return next insn, not 0, if block ends in a barrier.

From-SVN: r9916
---

diff --git a/gcc/cse.c b/gcc/cse.c
index 9b3aa2ea342f..7f610cea7c55 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -8429,22 +8429,25 @@ cse_basic_block (from, to, next_branch, around_loop)
 	  && GET_CODE (to) == CODE_LABEL && --LABEL_NUSES (to) == to_usage)
 	{
 	  struct cse_basic_block_data val;
+	  rtx prev;
 
 	  insn = NEXT_INSN (to);
 
 	  if (LABEL_NUSES (to) == 0)
-	    delete_insn (to);
+	    insn = delete_insn (to);
 
-	  /* Find the end of the following block.  Note that we won't be
-	     following branches in this case.  If TO was the last insn
-	     in the function, we are done.  Similarly, if we deleted the
-	     insn after TO, it must have been because it was preceded by
-	     a BARRIER.  In that case, we are done with this block because it
-	     has no continuation.  */
-
-	  if (insn == 0 || INSN_DELETED_P (insn))
+	  /* If TO was the last insn in the function, we are done.  */
+	  if (insn == 0)
 	    return 0;
 
+	  /* If TO was preceded by a BARRIER we are done with this block
+	     because it has no continuation.  */
+	  prev = prev_nonnote_insn (to);
+	  if (prev && GET_CODE (prev) == BARRIER)
+	    return insn;
+
+	  /* Find the end of the following block.  Note that we won't be
+	     following branches in this case.  */
 	  to_usage = 0;
 	  val.path_size = 0;
 	  cse_end_of_basic_block (insn, &val, 0, 0, 0);