tree b30e8e4628eee08e91a51c918b44fea901db868e
parent 47ad6ce1afad6b70927347dfa15e0f1dc76bf5bb
author Rafael Espindola <rafael.espindola@gmail.com> 1377122343 +0000
committer Rafael Espindola <rafael.espindola@gmail.com> 1377122343 +0000

Move -mfpmath handling to -cc1 and implement it for x86.

The original idea was to implement it all on the driver, but to do that the
driver needs to know the sse level and to do that it has to know the default
features of a cpu.

Benjamin Kramer pointed out that if one day we decide to implement support for
' __attribute__ ((__target__ ("arch=core2")))', then the frontend needs to
keep its knowledge of default features of a cpu.

To avoid duplicating which part of clang handles default cpu features,
it is probably better to handle -mfpmath in the frontend.

For ARM this patch is just a small improvement. Instead of a cpu list, we
check if neon is enabled, which allows us to reject things like

-mcpu=cortex-a9 -mfpu=vfp -mfpmath=neon

For X86, since LLVM doesn't support an independent ssefp feature, we just
make sure the selected -mfpmath matches the sse level.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188939 91177308-0d34-0410-b5e6-96231b3b80d8