[PATCH] [X86] replace vinsertf128 intrinsics with generic shuffles

[Simon Pilgrim]

In http://reviews.llvm.org/D8086#136822, @probinson wrote:

> In http://reviews.llvm.org/D8086#136096, @craig.topper wrote:
>
> > I believe I was previously told that we had to keep auto-upgrade support for everything from 3.0 onwards (see comment from Chris in r154778 back in April 2012). Maybe they can go away at 4.0?
>
>
> I thought 4.1 (so 4.0 can read all 3.x input).


So the plan is for all of the auto-upgrade intrinsics to be dropped at once at 4.1? Would a deprecation warning be useful here (either now or at 4.0) or at least a description in the comments in AutoUpgrade.cpp?


http://reviews.llvm.org/D8086

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