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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
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