[PATCH] Improve DAG combine pass on certain IR vector patterns

[Chandler Carruth]

On Fri, Jan 16, 2015 at 2:22 PM, Fiona Glaser <fglaser at apple.com> wrote:

> Please use the same tetsing strategy as the
> vector-shuffle-{128,256,512}-*.ll test files. This has made it *much*
> easier to understand the feature sets tested and how we generate code for
> each operation.
>
>
> So, going by vector-shuffle-256, I should do something like:
>
> ; RUN: llc < %s -mcpu=x86-64 -mattr=+avx | FileCheck %s --check-prefix=ALL
> --check-prefix=AVX --check-prefix=AVX1
> ; RUN: llc < %s -mcpu=x86-64 -mattr=+avx2 | FileCheck %s
> --check-prefix=ALL --check-prefix=AVX --check-prefix=AVX2
>
> target triple = "x86_64-unknown-unknown”
>
> that?
>

That's my preference, yes.
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