* cse.c (delete_trivially_dead_insn): Don't iterate.

From-SVN: r94498

gcc/ChangeLog

+2005-01-31  Kazu Hirata  <kazu@cs.umass.edu>
+
+	* cse.c (delete_trivially_dead_insn): Don't iterate.
+
 2005-01-31  Andrew Pinski  <pinskia@physics.uc.edu>
 
 	* config/rs6000/rs6000.md (copysignsf3): New expand.

gcc/cse.c

@@ -7268,7 +7268,7 @@ delete_trivially_dead_insns (rtx insns, int nreg)
   int *counts;
   rtx insn, prev;
   int in_libcall = 0, dead_libcall = 0;
-  int ndead = 0, nlastdead, niterations = 0;
+  int ndead = 0;
 
   timevar_push (TV_DELETE_TRIVIALLY_DEAD);
   /* First count the number of times each register is used.  */
@@ -7276,10 +7276,6 @@ delete_trivially_dead_insns (rtx insns, int nreg)
   for (insn = next_real_insn (insns); insn; insn = next_real_insn (insn))
     count_reg_usage (insn, counts, 1);
 
-  do
-    {
-      nlastdead = ndead;
-      niterations++;
   /* Go from the last insn to the first and delete insns that only set unused
      registers or copy a register to itself.  As we delete an insn, remove
      usage counts for registers it uses.
@@ -7329,12 +7325,10 @@ delete_trivially_dead_insns (rtx insns, int nreg)
 	  dead_libcall = 0;
 	}
     }
-    }
-  while (ndead != nlastdead);
 
   if (dump_file && ndead)
-    fprintf (dump_file, "Deleted %i trivially dead insns; %i iterations\n",
-	     ndead, niterations);
+    fprintf (dump_file, "Deleted %i trivially dead insns\n",
+	     ndead);
   /* Clean up.  */
   free (counts);
   timevar_pop (TV_DELETE_TRIVIALLY_DEAD);