YunQiang Su 9739bb81ae MIPS: fix build from IR files, nan2008 and FpAbi ...

When we use llc or lld to compiler IR files, the features +nan2008 and +fpxx/+fp64 are not used.
Thus wrong format files are produced.

In IR files, the attributes are only set for function while not the whole compile units.
So we output `.nan 2008` and `.module fp=xx/64` before every function.

`isFPXXDefault`: for o32, the FPXX should always be the default, no matter about the vendors.
Of course some distributions with FP64 default enabled should be listed explicit.
Let's add them in future if we know about one.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D138179

2022-12-15 09:04:36 +00:00

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