[all-commits] [llvm/llvm-project] 09d402: Fix compatibility for __builtin_stdarg_start

[Joerg Sonnenberger via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 09d402185394fdbf1f60233a7f42a4a1108c2cd3
      https://github.com/llvm/llvm-project/commit/09d402185394fdbf1f60233a7f42a4a1108c2cd3
  Author: Joerg Sonnenberger <joerg at bec.de>
  Date:   2020-03-28 (Sat, 28 Mar 2020)

  Changed paths:
    M clang/include/clang/Basic/Builtins.def
    M clang/test/SemaCXX/vararg-non-pod.cpp

  Log Message:
  -----------
  Fix compatibility for __builtin_stdarg_start

The __builtin_stdarg_start is the legacy spelling of __builtin_va_start.
It should behave exactly the same, but for the last 9 years it would
behave subtly different for diagnostics. Follow the change from
29ad95b23217 to require custom type checking.