[PATCH] D23249: Refactor getMipsEFlags.

[Rui Ueyama via llvm-commits]

ruiu created this revision.
ruiu added a reviewer: atanasyan.
ruiu added a subscriber: llvm-commits.
Herald added a subscriber: sdardis.

Previously, we incrementally updated the reuslting flag as we check
file flags, so it was not very clear who is updating what flags.
This patch makes them pure functions -- that has no side effect and
don't update arguments to improve readability.

Now each function construct a patial result, and all resutls are then
bitwise-OR'ed to construct the final result.

This patch also creates a new file, Mips.cpp, to move all these
MIPS functions to a separate file.

https://reviews.llvm.org/D23249

Files:
  ELF/CMakeLists.txt
  ELF/Mips.cpp
  ELF/Writer.cpp
  ELF/Writer.h
  test/ELF/mips-elf-flags-err.s

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