remove insn scheduling (not supported with thumb)

1 files changed, 0 insertions, 53 deletions

diff --git a/gcc/local-alloc.c b/gcc/local-alloc.c
index 101f16d..1fbb20b 100755
--- a/gcc/local-alloc.c
+++ b/gcc/local-alloc.c
@@ -1389,51 +1389,8 @@ block_alloc (b)
       q = qty_order[i];
       if (qty_phys_reg[q] < 0)
 	{
-#ifdef INSN_SCHEDULING
-	  /* These values represent the adjusted lifetime of a qty so
-	     that it conflicts with qtys which appear near the start/end
-	     of this qty's lifetime.
-
-	     The purpose behind extending the lifetime of this qty is to
-	     discourage the register allocator from creating false
-	     dependencies.
- 
-	     The adjustment value is choosen to indicate that this qty
-	     conflicts with all the qtys in the instructions immediately
-	     before and after the lifetime of this qty.
-
-	     Experiments have shown that higher values tend to hurt
-	     overall code performance.
-
-	     If allocation using the extended lifetime fails we will try
-	     again with the qty's unadjusted lifetime.  */
-	  int fake_birth = MAX (0, qty_birth[q] - 2 + qty_birth[q] % 2);
-	  int fake_death = MIN (insn_number * 2 + 1,
-				qty_death[q] + 2 - qty_death[q] % 2);
-#endif
-
 	  if (N_REG_CLASSES > 1)
 	    {
-#ifdef INSN_SCHEDULING
-	      /* We try to avoid using hard registers allocated to qtys which
-		 are born immediately after this qty or die immediately before
-		 this qty.
-
-		 This optimization is only appropriate when we will run
-		 a scheduling pass after reload and we are not optimizing
-		 for code size.  */
-	      if (flag_schedule_insns_after_reload
-		  && !optimize_size
-		  && !SMALL_REGISTER_CLASSES)
-		{
-		
-		  qty_phys_reg[q] = find_free_reg (qty_min_class[q], 
-						   qty_mode[q], q, 0, 0,
-						   fake_birth, fake_death);
-		  if (qty_phys_reg[q] >= 0)
-		    continue;
-		}
-#endif
 	      qty_phys_reg[q] = find_free_reg (qty_min_class[q], 
 					       qty_mode[q], q, 0, 0,
 					       qty_birth[q], qty_death[q]);
@@ -1441,16 +1398,6 @@ block_alloc (b)
 		continue;
 	    }
 
-#ifdef INSN_SCHEDULING
-	  /* Similarly, avoid false dependencies.  */
-	  if (flag_schedule_insns_after_reload
-	      && !optimize_size
-	      && !SMALL_REGISTER_CLASSES
-	      && qty_alternate_class[q] != NO_REGS)
-	    qty_phys_reg[q] = find_free_reg (qty_alternate_class[q],
-					     qty_mode[q], q, 0, 0,
-					     fake_birth, fake_death);
-#endif
 	  if (qty_alternate_class[q] != NO_REGS)
 	    qty_phys_reg[q] = find_free_reg (qty_alternate_class[q],
 					     qty_mode[q], q, 0, 0,