cse.c (constant_pool_entries_regcost): New global variable to hold the register cost component of...

	* cse.c (constant_pool_entries_regcost): New global variable to
	hold the register cost component of constant_pool_entries_cost.
	(fold_rtx): Calculate constant_pool_entries_regcost at the same
	time as constant_pool_entries_cost.
	(cse_insn): Set both src_folded_cost and src_folded_regcost from
	constant_pool_entries_cost and constant_pool_entries_regcost.
	(cse_main): Initialize constant_pool_entries_regcost to zero.

	* optabs.c (expand_unop): Attach a REG_EQUAL note describing
	the semantics of the sequence of bit operations used to negate
	a floating-point value.
	(expand_abs_nojump): Likewise attach a REG_EQUAL note describing
	the semantics of the bit operations used to abs a floating point
	value.

From-SVN: r72326

1 files changed, 7 insertions, 1 deletions

diff --git a/gcc/cse.c b/gcc/cse.c
index 8683f4a..7cdc72f 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -569,6 +569,7 @@ static struct table_elt *last_jump_equiv_class;
    the insn.  */
 
 static int constant_pool_entries_cost;
+static int constant_pool_entries_regcost;
 
 /* This data describes a block that will be processed by cse_basic_block.  */
 
@@ -3529,7 +3530,10 @@ fold_rtx (rtx x, rtx insn)
 	    rtx new;
 
 	    if (CONSTANT_P (constant) && GET_CODE (constant) != CONST_INT)
-	      constant_pool_entries_cost = COST (constant);
+	      {
+		constant_pool_entries_cost = COST (constant);
+		constant_pool_entries_regcost = approx_reg_cost (constant);
+	      }
 
 	    /* If we are loading the full constant, we have an equivalence.  */
 	    if (offset == 0 && mode == const_mode)
@@ -5507,6 +5511,7 @@ cse_insn (rtx insn, rtx libcall_insn)
 	      src_folded_force_flag = 1;
 	      src_folded = trial;
 	      src_folded_cost = constant_pool_entries_cost;
+	      src_folded_regcost = constant_pool_entries_regcost;
 	    }
 	}
 
@@ -6939,6 +6944,7 @@ cse_main (rtx f, int nregs, int after_loop, FILE *file)
   cse_jumps_altered = 0;
   recorded_label_ref = 0;
   constant_pool_entries_cost = 0;
+  constant_pool_entries_regcost = 0;
   val.path_size = 0;
 
   init_recog ();