Upstream-Status: Inappropriate [Backport]
From ad24dcb7c07f1f9d41cb6782ea14c6c1727c4cb0 Mon Sep 17 00:00:00 2001
From: uros <uros@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 21 Apr 2011 20:23:55 +0000
Subject: [PATCH 164/200] 	PR target/48708
 	* config/i386/i386.c (ix86_expand_vector_set) <V2DImode>: Generate
 	vec_extract and vec_concat for non-SSE4_1 targets.

testsuite/ChangeLog:

	PR target/48708
	* gcc.target/i386/pr48708.c: New test.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@172843 138bc75d-0d04-0410-961f-82ee72b054a4

index a524d77..6e4bb3b 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -31213,10 +31213,19 @@ ix86_expand_vector_set (bool mmx_ok, rtx target, rtx val, int elt)
       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;
new file mode 100644
index 0000000..355c2b2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr48708.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse2" } */
+
+#include <emmintrin.h>
+
+typedef long long T __attribute__((may_alias));
+struct S { __m128i d; };
+
+__m128i
+foo (long long *x, struct S *y, __m128i *z)
+{
+  struct S s = *y;
+  ((T *) &s.d)[0] = *x;
+  return _mm_cmpeq_epi16 (s.d, *z);
+}
-- 
1.7.0.4