[all-commits] [llvm/llvm-project] 4299c7: AArch64: add __builtin_arm_trap

[Tim Northover via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4299c727e4806aa55398ad23da48a401554cd432
      https://github.com/llvm/llvm-project/commit/4299c727e4806aa55398ad23da48a401554cd432
  Author: Tim Northover <tnorthover at apple.com>
  Date:   2024-03-14 (Thu, 14 Mar 2024)

  Changed paths:
    M clang/docs/LanguageExtensions.rst
    M clang/include/clang/Basic/BuiltinsAArch64.def
    M clang/lib/CodeGen/CGBuiltin.cpp
    M clang/test/CodeGen/builtins-arm64.c
    M clang/test/Sema/builtins-arm64.c

  Log Message:
  -----------
  AArch64: add __builtin_arm_trap

It's useful to provide an indicator code with the trap, which the generic
__builtin_trap can't do. asm("brk #N") is an option, but following that with a
__builtin_unreachable() leads to two traps when the compiler doesn't know the
block can't return. So compiler support like this is useful.



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