This is still a work in progress but most of the NEON instruction set
is supported.

llvm-svn: 73919

llvm-svn: 44382

llvm-svn: 44380

llvm-svn: 43164

llvm-svn: 41808

llvm-svn: 38513

llvm-svn: 36586

llvm-svn: 36273

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llvm-svn: 35229

llvm-svn: 35049

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llvm-svn: 35045

scavenging todo item, since it is now implemented.

llvm-svn: 35044

llvm-svn: 34755

llvm-svn: 34598

from README.
When no water available, use end of block if in range.  (More to do here.)

llvm-svn: 34563

llvm-svn: 34523

llvm-svn: 33778

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llvm-svn: 30996

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llvm-svn: 30802

llvm-svn: 30704

llvm-svn: 30581

llvm-svn: 29814