[PATCH] D22181: Add runtime support for __cpu_model (__builtin_cpu_supports)

[Alina Sbirlea via llvm-commits]

asbirlea created this revision.
asbirlea added reviewers: llvm-commits, joerg, echristo, mehdi_amini.
Herald added a subscriber: mehdi_amini.

    This aims to add support for __cpu_model and address Bug 25510. It uses
    the code from lib/Support/Host.cpp for cpu detection, and creates
    __cpu_model with that info.

    Tested on OSX and built on Linux as well (though libgcc is the default).
    The use of "asm" required -std=gnu99, hence the cmake change. Corrections
    on better addressing this are welcome.

    Previously reverted, up for review again to iron out outstanding issues.

http://reviews.llvm.org/D22181

Files:
  lib/builtins/CMakeLists.txt
  lib/builtins/cpu_model.c
  test/builtins/Unit/cpu_model_test.c

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