Update some EH tests that were violating the new EH model.

The landingpad instruction needs to be the first non-PHI instruction in the
unwind destination block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177650 91177308-0d34-0410-b5e6-96231b3b80d8
Avoid NEON SP-FP unless unsafe-math or Darwin

NEON is not IEEE 754 compliant, so we should avoid lowering single-precision
floating point operations with NEON unless unsafe-math is turned on. The
equivalent VFP instructions are IEEE 754 compliant, but in some cores they're
much slower, so some archs/OSs might still request it to be on by default,
such as Swift and Darwin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177651 91177308-0d34-0410-b5e6-96231b3b80d8