[Bug target/48708] Invalid V2DI vector set insn generated

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48708

Uros Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2011.04.21 08:47:48
     Ever Confirmed|0                           |1

--- Comment #1 from Uros Bizjak <ubizjak at gmail dot com> 2011-04-21 08:47:48 
UTC ---
Patch in testing:

Index: i386.c
===================================================================
--- i386.c    (revision 172811)
+++ i386.c    (working copy)
@@ -31483,10 +31483,19 @@ ix86_expand_vector_set (bool mmx_ok, rtx
       break;

     case V2DImode:
-      use_vec_merge = TARGET_SSE4_1;
+      use_vec_merge = TARGET_SSE4_1 && TARGET_64BIT;
       if (use_vec_merge)
     break;

+      tmp = gen_reg_rtx (GET_MODE_INNER (mode));
+      ix86_expand_vector_extract (false, tmp, target, 1 - elt);
+      if (elt == 0)
+    tmp = gen_rtx_VEC_CONCAT (mode, tmp, val);
+      else
+    tmp = gen_rtx_VEC_CONCAT (mode, val, tmp);
+      emit_insn (gen_rtx_SET (VOIDmode, target, tmp));
+      return;
+
     case V2DFmode:
       {
     rtx op0, op1;