pa.c (pa_output_move_double): Directly handle register indexed memory operand.

	* config/pa/pa.c (pa_output_move_double): Directly handle register
	indexed memory operand.  Simplify handling of scaled register indexed
	memory operands.

From-SVN: r221835

gcc/ChangeLog

+2015-04-02  John David Anglin  <danglin@gcc.gnu.org>
+
+	* config/pa/pa.c (pa_output_move_double): Directly handle register
+	indexed memory operand.  Simplify handling of scaled register indexed
+	memory operands.
+
 2015-04-02  Ilya Enkovich  <ilya.enkovich@intel.com>
 
 	PR driver/65444

gcc/config/pa/pa.c

@@ -2595,28 +2595,29 @@ pa_output_move_double (rtx *operands)
 	       && GET_CODE (XEXP (addr, 0)) == MULT)
 	{
 	  rtx xoperands[4];
-	  rtx high_reg = gen_rtx_SUBREG (SImode, operands[0], 0);
 
-	  if (!reg_overlap_mentioned_p (high_reg, addr))
-	    {
-	      xoperands[0] = high_reg;
-	      xoperands[1] = XEXP (addr, 1);
-	      xoperands[2] = XEXP (XEXP (addr, 0), 0);
-	      xoperands[3] = XEXP (XEXP (addr, 0), 1);
-	      output_asm_insn ("{sh%O3addl %2,%1,%0|shladd,l %2,%O3,%1,%0}",
-			       xoperands);
-	      return "ldw 4(%0),%R0\n\tldw 0(%0),%0";
-	    }
-	  else
-	    {
-	      xoperands[0] = high_reg;
-	      xoperands[1] = XEXP (addr, 1);
-	      xoperands[2] = XEXP (XEXP (addr, 0), 0);
-	      xoperands[3] = XEXP (XEXP (addr, 0), 1);
-	      output_asm_insn ("{sh%O3addl %2,%1,%R0|shladd,l %2,%O3,%1,%R0}",
-			       xoperands);
-	      return "ldw 0(%R0),%0\n\tldw 4(%R0),%R0";
-	    }
+	  /* Load address into left half of destination register.  */
+	  xoperands[0] = gen_rtx_SUBREG (SImode, operands[0], 0);
+	  xoperands[1] = XEXP (addr, 1);
+	  xoperands[2] = XEXP (XEXP (addr, 0), 0);
+	  xoperands[3] = XEXP (XEXP (addr, 0), 1);
+	  output_asm_insn ("{sh%O3addl %2,%1,%0|shladd,l %2,%O3,%1,%0}",
+			   xoperands);
+	  return "ldw 4(%0),%R0\n\tldw 0(%0),%0";
+	}
+      else if (GET_CODE (addr) == PLUS
+	       && REG_P (XEXP (addr, 0))
+	       && REG_P (XEXP (addr, 1)))
+	{
+	  rtx xoperands[3];
+
+	  /* Load address into left half of destination register.  */
+	  xoperands[0] = gen_rtx_SUBREG (SImode, operands[0], 0);
+	  xoperands[1] = XEXP (addr, 0);
+	  xoperands[2] = XEXP (addr, 1);
+	  output_asm_insn ("{addl|add,l} %1,%2,%0",
+			   xoperands);
+	  return "ldw 4(%0),%R0\n\tldw 0(%0),%0";
 	}
     }