flow.c (tidy_fallthru_edge): Don't delete the jump when it's a still-valid conditional jump.

* flow.c (tidy_fallthru_edge): Don't delete the jump when it's a still-valid conditional jump. From-SVN: r33468

flow.c (tidy_fallthru_edge): Don't delete the jump when it's a still-valid conditional jump.
* flow.c (tidy_fallthru_edge): Don't delete the jump when it's a still-valid conditional jump. From-SVN: r33468
56aba4a8 · Richard Henderson · Richard Henderson · 604617ba · 56aba4a8 · 56aba4a8
Commit 56aba4a8 authored Apr 26, 2000 by Richard Henderson Committed by Richard Henderson Apr 26, 2000
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gcc/ChangeLog
+5 -0

gcc/flow.c
+3 -1

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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
 2000-04-26  Richard Henderson  <rth@cygnus.com>

+	* flow.c (tidy_fallthru_edge): Don't delete the jump when it's
+	a still-valid conditional jump.
+
+2000-04-26  Richard Henderson  <rth@cygnus.com>
+
 	* jump.c (invert_jump): Always invert REG_BR_PROB.  Do it correctly.

 	* bb-reorder.c (reorder_basic_blocks): Don't run estimate_probability.

--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -2407,7 +2407,9 @@ tidy_fallthru_edge (e, b, c)
     If block B consisted only of this single jump, turn it into a deleted
     note.  */
  q = b->end;
-  if (GET_CODE (q) == JUMP_INSN)
+  if (GET_CODE (q) == JUMP_INSN
+      && (simplejump_p (q)
+	  || (b->succ == e && e->succ_next == NULL)))
    {
 #ifdef HAVE_cc0
      /* If this was a conditional jump, we need to also delete