[PATCH] [PPC64LE] Remove unnecessary swaps from lane-insensitive vector computations

[Bill Schmidt]

In http://reviews.llvm.org/D8565#151320, @echristo wrote:

> Quick Question: The testcases with the removed xxpermdi instruction checks - not being emitted at all, emitting fewer, useless to check anyhow, something else?


The tests check for total removal (xxswapd is an alternative mnemonic for this specific form of xxpermdi):

; CHECK-NOT: xxpermdi
; CHECK-NOT: xxswapd


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http://reviews.llvm.org/D8565

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