* cfgrtl.c (redirect_edge_and_branch): Abort if redirect_jump fails.

From-SVN: r45870

gcc/ChangeLog

+2001-09-28  Richard Henderson  <rth@redhat.com>
+
+	* cfgrtl.c (redirect_edge_and_branch): Abort if redirect_jump fails.
+
 2001-09-28  Rainer Orth  <ro@TechFak.Uni-Bielefeld.DE>
 
 	* config/i386/sol2.h (CPLUSPLUS_CPP_SPEC): Define.

gcc/cfgrtl.c

@@ -860,7 +860,10 @@ redirect_edge_and_branch (e, target)
       /* If the insn doesn't go where we think, we're confused.  */
       if (JUMP_LABEL (insn) != old_label)
 	abort ();
-      redirect_jump (insn, block_label (target), 0);
+      /* If the substitution doesn't succeed, die.  This can happen
+	 if the back end emitted unrecognizable instructions.  */
+      if (! redirect_jump (insn, block_label (target), 0))
+	abort ();
     }
 
   if (rtl_dump_file)