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c5371836a5
when SSE4.1 is available. This removes a ton of domain crossing from blend code paths that were ending up in the floating point code path. This is just the tip of the iceberg though. The real switch is for integer blend lowering to more actively rely on this instruction being available so we don't hit shufps at all any longer. =] That will come in a follow-up patch. Another place where we need better support is for using PBLENDVB when doing so avoids the need to have two complementary PSHUFB masks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217767 91177308-0d34-0410-b5e6-96231b3b80d8
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