i386.c (construct_container): Rewrite processing BLKmode with X86_64_SSE_CLASS.

2009-02-12  H.J. Lu  <hongjiu.lu@intel.com>

	* config/i386/i386.c (construct_container): Rewrite processing
	BLKmode with X86_64_SSE_CLASS.

From-SVN: r144128

gcc/ChangeLog

+2009-02-12  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* config/i386/i386.c (construct_container): Rewrite processing
+	BLKmode with X86_64_SSE_CLASS.
+
 2009-02-12  Paolo Bonzini  <bonzini@gnu.org>
 
 	PR target/39152

gcc/config/i386/i386.c

@@ -5315,6 +5315,8 @@ construct_container (enum machine_mode mode, enum machine_mode orig_mode,
   /* Otherwise figure out the entries of the PARALLEL.  */
   for (i = 0; i < n; i++)
     {
+      int pos;
+
       switch (regclass[i])
         {
 	  case X86_64_NO_CLASS:
@@ -5351,24 +5353,36 @@ construct_container (enum machine_mode mode, enum machine_mode orig_mode,
 	    sse_regno++;
 	    break;
 	  case X86_64_SSE_CLASS:
-	    if (i < n - 1 && regclass[i + 1] == X86_64_SSEUP_CLASS)
+	    pos = i;
+	    switch (n)
+	      {
+	      case 1:
+		tmpmode = DImode;
+		break;
+	      case 2:
+		if (i == 0 && regclass[1] == X86_64_SSEUP_CLASS)
 		  {
-		if (regclass[i + 2] == X86_64_SSEUP_CLASS
-		    || regclass[i + 3] == X86_64_SSEUP_CLASS)
-		  tmpmode = OImode;
-		else
 		    tmpmode = TImode;
+		    i++;
 		  }
 		else
 		  tmpmode = DImode;
+		break;
+	      case 4:
+		gcc_assert (i == 0
+			    && regclass[1] == X86_64_SSEUP_CLASS
+			    && regclass[2] == X86_64_SSEUP_CLASS
+			    && regclass[3] == X86_64_SSEUP_CLASS);
+		tmpmode = OImode;
+		i += 3;
+		break;
+	      default:
+		gcc_unreachable ();
+	      }
 	    exp [nexps++] = gen_rtx_EXPR_LIST (VOIDmode,
 					       gen_rtx_REG (tmpmode,
 							    SSE_REGNO (sse_regno)),
-					       GEN_INT (i*8));
-	    if (tmpmode == OImode)
-	      i += 3;
-	    else if (tmpmode == TImode)
-	      i++;
+					       GEN_INT (pos*8));
 	    sse_regno++;
 	    break;
 	  default: