i386.c (ix86_build_const_vector): Rewrite using loop with RTVEC_ELT accessor.

	* config/i386/i386.c (ix86_build_const_vector): Rewrite using loop
	with RTVEC_ELT accessor.

From-SVN: r178124

gcc/ChangeLog

 2011-08-26  Uros Bizjak  <ubizjak@gmail.com>
 
+	* config/i386/i386.md (round<mode>2): New expander.
+	* config/i386/i386.c (enum ix86_builtins): Add
+	IX86_BUILTIN_ROUND{PS,PD}_AZ{,256}.
+	(struct builtin_description): Add __builtin_ia32_round{ps,pd}_az{,256}
+	descriptions.
+	(ix86_builtin_vectorized_function): Handle BUILT_IN_ROUND{,F} builtins.
+	(ix86_build_const_vector): Rewrite using loop with RTVEC_ELT accessor.
+
+2011-08-26  Uros Bizjak  <ubizjak@gmail.com>
+
 	PR middle-end/50083
 	* convert.c (convert_to_integer) <BUIT_IN_ROUND{,F,L}>: Convert
 	only when TARGET_C99_FUNCTIONS.

gcc/config/i386/i386.c

@@ -16512,52 +16512,29 @@ ix86_expand_convert_uns_sisf_sse (rtx target, rtx input)
 rtx
 ix86_build_const_vector (enum machine_mode mode, bool vect, rtx value)
 {
+  int i, n_elt;
   rtvec v;
+  enum machine_mode scalar_mode;
+
   switch (mode)
     {
     case V4SImode:
-      gcc_assert (vect);
-      v = gen_rtvec (4, value, value, value, value);
-      return gen_rtx_CONST_VECTOR (V4SImode, v);
-
     case V2DImode:
       gcc_assert (vect);
-      v = gen_rtvec (2, value, value);
-      return gen_rtx_CONST_VECTOR (V2DImode, v);
-
     case V8SFmode:
-      if (vect)
-	v = gen_rtvec (8, value, value, value, value,
-		       value, value, value, value);
-      else
-	v = gen_rtvec (8, value, CONST0_RTX (SFmode),
-		       CONST0_RTX (SFmode), CONST0_RTX (SFmode),
-		       CONST0_RTX (SFmode), CONST0_RTX (SFmode),
-		       CONST0_RTX (SFmode), CONST0_RTX (SFmode));
-      return gen_rtx_CONST_VECTOR (V8SFmode, v);
-
     case V4SFmode:
-      if (vect)
-	v = gen_rtvec (4, value, value, value, value);
-      else
-	v = gen_rtvec (4, value, CONST0_RTX (SFmode),
-		       CONST0_RTX (SFmode), CONST0_RTX (SFmode));
-      return gen_rtx_CONST_VECTOR (V4SFmode, v);
-
     case V4DFmode:
-      if (vect)
-	v = gen_rtvec (4, value, value, value, value);
-      else
-	v = gen_rtvec (4, value, CONST0_RTX (DFmode),
-		       CONST0_RTX (DFmode), CONST0_RTX (DFmode));
-      return gen_rtx_CONST_VECTOR (V4DFmode, v);
-
     case V2DFmode:
-      if (vect)
-	v = gen_rtvec (2, value, value);
-      else
-	v = gen_rtvec (2, value, CONST0_RTX (DFmode));
-      return gen_rtx_CONST_VECTOR (V2DFmode, v);
+      n_elt = GET_MODE_NUNITS (mode);
+      v = rtvec_alloc (n_elt);
+      scalar_mode = GET_MODE_INNER (mode);
+
+      RTVEC_ELT (v, 0) = value;
+
+      for (i = 1; i < n_elt; ++i)
+	RTVEC_ELT (v, i) = vect ? value : CONST0_RTX (scalar_mode);
+
+      return gen_rtx_CONST_VECTOR (mode, v);
 
     default:
       gcc_unreachable ();