tree b4201afe672b4090ac1699d9190a28341428fa59
parent 36cbfbfce889642057bd007eac3569ea9f58e1e8
author Lang Hames <lhames@gmail.com> 1341536359 +0000
committer Lang Hames <lhames@gmail.com> 1341536359 +0000

Add -ffp-contract = { fast | on | off }   command line option support.

This flag sets the 'fp-contract' mode, which controls the formation of fused
floating point operations. Available modes are:

- Fast: Form fused operations anywhere. 
- On: Form fused operations where allowed by FP_CONTRACT. This is the default
      mode.
- Off: Don't form fused operations (in future this may be relaxed to forming
       fused operations where it can be proved that the result won't be
       affected).

Currently clang doesn't support the FP_CONTRACT pragma, so the 'On' and 'Off'
modes are equivalent.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159794 91177308-0d34-0410-b5e6-96231b3b80d8