[PATCH] D20729: [mips] Compact branch policy setting

[Simon Dardis via cfe-commits]

sdardis created this revision.
sdardis added reviewers: dsanders, atanasyan.
sdardis added a subscriber: cfe-commits.
Herald added a reviewer: vkalintiris.
Herald added a subscriber: sdardis.

This patch adds the commandline option -mcompact-branches={never,optimal,always),
which controls how LLVM generates compact branches for MIPSR6 targets. By default,
the compact branch policy is 'optimal' where LLVM will generate the most
appropriate branch for any situation. The 'never' and 'always' policy will disable
or always generate compact branches wherever possible respectfully.

http://reviews.llvm.org/D20729

Files:
  docs/UsersManual.rst
  include/clang/Basic/DiagnosticDriverKinds.td
  include/clang/Basic/DiagnosticGroups.td
  include/clang/Driver/Options.td
  lib/Driver/Tools.cpp
  lib/Driver/Tools.h
  test/Driver/mips-features.c

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