[PATCH] Fix PR18054

[Nadav Rotem]

LGTM. 

On Nov 26, 2013, at 11:46 AM, Michael Liao <michael.liao at intel.com> wrote:

> Kindly ping with patch reattached. - Michael
> 
> On Mon, 2013-11-25 at 01:29 -0800, Michael Liao wrote:
>> Hi All,
>> 
>> The attached patch fixed PR18054 which is caused by a bug in X86
>> sign_extend_inreg lowering. Extra checking the in-reg type is needed as
>> (vsext x) is only when x is a vector type of i8, i16, or i32. If x is a
>> vector type of i1, is not valid to use (vsext x) alone.
>> 
>> Thanks for review
>> - Michael
>> 
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> 
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