[PATCH] FIx PR16026

[Nadav Rotem]

On Jun 5, 2013, at 11:17 AM, Michael Liao <michael.liao at intel.com> wrote:

> The patch doesn't disable that but try
> to simplify it by deferring when one of the operand of that build_vector
> has the pattern of (extract_vector_elt (shuffle_vector ..)).

The patch disables this optimization when one of the operands extract from a vector. I am not sure I understand the motivation. I understand that it helps your test case, but if this is a good change, why not apply it to concat_vector, or build_vector as well. Why only shuffle_vector ?  

Nadav
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