[PATCH, i386, AVX] Fix typo in i386.c/standard_sse_constant_opcode ().

[Kirill Yukhin]

Hello,

`vpcmpeqd' insn is only available in AVX2, however
[1] added check for AVX instead. Looks like a typo.

Patch in the bottom fixes that.

Bootstrapped, regtest still run.
Is it ok for main trunk if pass?

gcc/
        * config/i386/i386.c (standard_sse_constant_opcode): Emit
        vpcmpeqd if AVX2 is enabled.

[1] - https://gcc.gnu.org/ml/gcc-cvs/2011-09/msg00318.html

--
Thanks, K

commit e30c86b06968416e7401a113b866ae353311aa10
Author: Kirill Yukhin <kirill.yuk...@intel.com>
Date:   Wed Mar 23 14:08:07 2016 +0300

    AVX2. Emit vpcmpeqd for const_m1 only if AVX2 is enabled.

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 1639704..7f5db75 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -10859,7 +10859,7 @@ standard_sse_constant_opcode (rtx_insn *insn, rtx x)
          || get_attr_mode (insn) == MODE_V8DF
          || get_attr_mode (insn) == MODE_V16SF)
        return "vpternlogd\t{$0xFF, %g0, %g0, %g0|%g0, %g0, %g0, 0xFF}";
-      if (TARGET_AVX)
+      if (TARGET_AVX2)
        return "vpcmpeqd\t%0, %0, %0";
       else
        return "pcmpeqd\t%0, %0";