double-int.h (double_int_and): New.

	* double-int.h (double_int_and): New.
	* combine.c (try_combine): Clean up, use double_int_* and
	immed_double_int_const functions.

From-SVN: r159842

gcc/ChangeLog

+2010-05-25  Anatoly Sokolov  <aesok@post.ru>
+
+	* double-int.h (double_int_and): New.
+	* combine.c (try_combine): Clean up, use double_int_* and
+	immed_double_int_const functions.
+
 2010-05-25  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* configure.ac (gcc_cv_as_ld_jalr_reloc): Redirect grep stdout,

gcc/combine.c

@@ -2595,74 +2595,20 @@ try_combine (rtx i3, rtx i2, rtx i1, int *new_direct_jump_p)
 
       if (offset >= 0
 	  && (GET_MODE_BITSIZE (GET_MODE (SET_DEST (temp)))
-	      <= HOST_BITS_PER_WIDE_INT * 2))
+	      <= HOST_BITS_PER_DOUBLE_INT))
 	{
-	  HOST_WIDE_INT mhi, ohi, ihi;
-	  HOST_WIDE_INT mlo, olo, ilo;
+	  double_int m, o, i;
 	  rtx inner = SET_SRC (PATTERN (i3));
 	  rtx outer = SET_SRC (temp);
 
-	  if (CONST_INT_P (outer))
-	    {
-	      olo = INTVAL (outer);
-	      ohi = olo < 0 ? -1 : 0;
-	    }
-	  else
-	    {
-	      olo = CONST_DOUBLE_LOW (outer);
-	      ohi = CONST_DOUBLE_HIGH (outer);
-	    }
-
-	  if (CONST_INT_P (inner))
-	    {
-	      ilo = INTVAL (inner);
-	      ihi = ilo < 0 ? -1 : 0;
-	    }
-	  else
-	    {
-	      ilo = CONST_DOUBLE_LOW (inner);
-	      ihi = CONST_DOUBLE_HIGH (inner);
-	    }
-
-	  if (width < HOST_BITS_PER_WIDE_INT)
-	    {
-	      mlo = ((unsigned HOST_WIDE_INT) 1 << width) - 1;
-	      mhi = 0;
-	    }
-	  else if (width < HOST_BITS_PER_WIDE_INT * 2)
-	    {
-	      mhi = ((unsigned HOST_WIDE_INT) 1
-		     << (width - HOST_BITS_PER_WIDE_INT)) - 1;
-	      mlo = -1;
-	    }
-	  else
-	    {
-	      mlo = -1;
-	      mhi = -1;
-	    }
-
-	  ilo &= mlo;
-	  ihi &= mhi;
-
-	  if (offset >= HOST_BITS_PER_WIDE_INT)
-	    {
-	      mhi = mlo << (offset - HOST_BITS_PER_WIDE_INT);
-	      mlo = 0;
-	      ihi = ilo << (offset - HOST_BITS_PER_WIDE_INT);
-	      ilo = 0;
-	    }
-	  else if (offset > 0)
-	    {
-	      mhi = (mhi << offset) | ((unsigned HOST_WIDE_INT) mlo
-		     		       >> (HOST_BITS_PER_WIDE_INT - offset));
-	      mlo = mlo << offset;
-	      ihi = (ihi << offset) | ((unsigned HOST_WIDE_INT) ilo
-		     		       >> (HOST_BITS_PER_WIDE_INT - offset));
-	      ilo = ilo << offset;
-	    }
+	  o = rtx_to_double_int (outer);
+	  i = rtx_to_double_int (inner);
 
-	  olo = (olo & ~mlo) | ilo;
-	  ohi = (ohi & ~mhi) | ihi;
+	  m = double_int_mask (width);
+	  i = double_int_and (i, m);
+	  m = double_int_lshift (m, offset, HOST_BITS_PER_DOUBLE_INT, false);
+	  i = double_int_lshift (i, offset, HOST_BITS_PER_DOUBLE_INT, false);
+	  o = double_int_ior (double_int_and (o, double_int_not (m)), i);
 
 	  combine_merges++;
 	  subst_insn = i3;
@@ -2675,7 +2621,7 @@ try_combine (rtx i3, rtx i2, rtx i1, int *new_direct_jump_p)
 	     resulting insn the new pattern for I3.  Then skip to where we
 	     validate the pattern.  Everything was set up above.  */
 	  SUBST (SET_SRC (temp),
-		 immed_double_const (olo, ohi, GET_MODE (SET_DEST (temp))));
+		 immed_double_int_const (o, GET_MODE (SET_DEST (temp))));
 
 	  newpat = PATTERN (i2);
 

gcc/double-int.h

@@ -147,6 +147,16 @@ double_int_ior (double_int a, double_int b)
   return a;
 }
 
+/* Returns A & B.  */
+
+static inline double_int
+double_int_and (double_int a, double_int b)
+{
+  a.low &= b.low;
+  a.high &= b.high;
+  return a;
+}
+
 /* Shift operations.  */
 double_int double_int_lshift (double_int, HOST_WIDE_INT, unsigned int, bool);
 double_int double_int_rshift (double_int, HOST_WIDE_INT, unsigned int, bool);