Ahmed Bougacha 0810814bcc [X86] Don't generate vbroadcasti128 for v4i64 splats from memory.
We used to erroneously match:
    (v4i64 shuffle (v2i64 load), <0,0,0,0>)

Whereas vbroadcasti128 is more like:
    (v4i64 shuffle (v2i64 load), <0,1,0,1>)

This problem doesn't exist for vbroadcastf128, which kept matching
the intrinsic after r231182.  We should perhaps re-introduce the
intrinsic here as well, but that's a separate issue still being
discussed.

While there, add some proper vbroadcastf128 tests.  We don't currently
match those, like for loading vbroadcastsd/ss on AVX (the reg-reg
broadcasts where added in AVX2).

Fixes PR23886.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240488 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-24 00:07:16 +00:00
2015-06-23 22:52:19 +00:00
2015-06-23 20:57:26 +00:00
2014-04-07 03:57:04 +00:00
2014-03-02 13:08:46 +00:00
2015-06-18 04:16:05 +00:00
2015-03-12 01:25:29 +00:00

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