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[AVX]: Support concatenate with zero vector.

From: "H.J. Lu" <hjl dot tools at gmail dot com>
To: "Gcc Patch List" <gcc-patches at gcc dot gnu dot org>
Date: Mon, 12 May 2008 14:00:10 -0700
Subject: [AVX]: Support concatenate with zero vector.

Hi,

I am checking this patch to support

(insn 10 9 11 3 x.c:17 (set (reg:V4DI 63)
        (vec_concat:V4DI (reg:V2DI 64)
            (const_vector:V2DI [
                    (const_int 0 [0x0])
                    (const_int 0 [0x0])
                ]))) -1 (nil))

H.J.
---
2008-05-12  H.J. Lu  <hongjiu.lu@intel.com>

        * config/i386/sse.md (*vec_concat<mode>_avx): Support
        concatenate with zero vector.

Attachment: c.txt
Description: Text document

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