Duncan Sands 17470bee5f Synthesize SSE3/AVX 128 bit horizontal add/sub instructions from
floating point add/sub of appropriate shuffle vectors.  Does not
synthesize the 256 bit AVX versions because they work differently.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140332 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-22 20:15:48 +00:00
..
2011-09-21 17:43:48 +00:00