[PATCH] Improve spillcost of literal pool loads

2014-12-02  Wilco Dijkstra  <wdijkstr@arm.com>

  gcc/
    ira-costs.c (scan_one_insn): Improve spill cost adjustment.

  gcc/testsuite
    gcc.target/aarch64/remat1.c: New testcase.

From-SVN: r218266

gcc/ChangeLog

+2014-12-02  Wilco Dijkstra  <wilco.dijkstra@arm.com>
+
+	* ira-costs.c (scan_one_insn): Improve spill cost adjustment.
+
 2014-12-02  Martin Jambor  <mjambor@suse.cz>
 
 	PR ipa/63814

gcc/ira-costs.c

@@ -1462,12 +1462,11 @@ scan_one_insn (rtx_insn *insn)
       && ((MEM_P (XEXP (note, 0))
 	   && !side_effects_p (SET_SRC (set)))
 	  || (CONSTANT_P (XEXP (note, 0))
-	      && targetm.legitimate_constant_p (GET_MODE (SET_DEST (set)),
-						XEXP (note, 0))
+	      && (! flag_pic || LEGITIMATE_PIC_OPERAND_P (XEXP (note, 0)))
 	      && REG_N_SETS (REGNO (SET_DEST (set))) == 1))
       && general_operand (SET_SRC (set), GET_MODE (SET_SRC (set))))
     {
-      enum reg_class cl = GENERAL_REGS;
+      enum reg_class cl = ALL_REGS;
       rtx reg = SET_DEST (set);
       int num = COST_INDEX (REGNO (reg));
 

gcc/testsuite/ChangeLog

+2014-12-02  Wilco Dijkstra  <wilco.dijkstra@arm.com>
+
+	* gcc.target/aarch64/remat1.c: New testcase.
+
 2014-12-01  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	PR rtl-optimization/59278