Fix a bug that APFloat::fusedMultiplyAdd() mistakenly evaluate "14.5f * -14.5f + 225.0f" to 225.0f.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181715 91177308-0d34-0410-b5e6-96231b3b80d8
[mips] Add option -mno-ldc1-sdc1.

This option is used when the user wants to avoid emitting double precision FP
loads and stores. Double precision FP loads and stores are expanded to single
precision instructions after register allocation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181718 91177308-0d34-0410-b5e6-96231b3b80d8
[objc-arc] Move the before optimization statistics gathering phase out of OptimizeIndividualCalls.

This makes the statistics gathering completely independent of the actual
optimization occuring, preventing any sort of bleeding over from occuring.

Additionally, it simplifies a switch statement in the non-statistic gathering case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181719 91177308-0d34-0410-b5e6-96231b3b80d8