[PATCH] D34796: upporting -f(no)-reorder-functions flag, clang side change

[Taewook Oh via Phabricator via cfe-commits]

twoh created this revision.

When profile data is given, .hot/.unlikely section prefix is
added to hot/cold functions for linker to improve code locality. GCC
controls this behavior with '-f(no)-reorder-functions' flag, while LLVM
uses opt tool option '-profile-guided-section-prefix=true/false'. This
patch is for LLVM to support the same driver flag with GCC. LLVM side
patch is https://reviews.llvm.org/D34795.


https://reviews.llvm.org/D34796

Files:
  include/clang/Driver/Options.td
  include/clang/Frontend/CodeGenOptions.def
  lib/CodeGen/BackendUtil.cpp
  lib/Driver/ToolChains/Clang.cpp
  lib/Frontend/CompilerInvocation.cpp
  test/CodeGen/Inputs/freorder-functions.prof
  test/CodeGen/freorder-functions.c
  test/Driver/function-sections.c

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