[all-commits] [llvm/llvm-project] 8f90a5: [llvm-exegesis] Guard __builtin_thread_pointer use...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8f90a5cc45db3267dbc512d512dcb9e4e9193c9c
      https://github.com/llvm/llvm-project/commit/8f90a5cc45db3267dbc512d512dcb9e4e9193c9c
  Author: Fangrui Song <i at maskray.me>
  Date:   2023-07-17 (Mon, 17 Jul 2023)

  Changed paths:
    M llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp

  Log Message:
  -----------
  [llvm-exegesis] Guard __builtin_thread_pointer use with __has_builtin

While Clang targets have supported __builtin_thread_pointer for a very
long time (e.g., 2007 for AArch32, 2015 for AArch64), for some GCC
ports, the support is very new (11.0 for x86[1], while we need to
support GCC 7), and many ports haven't implemented
__builtin_thread_pointer yet (m68k, powerpc, etc).

[1]: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96955