[all-commits] [llvm/llvm-project] 9007f0: Revert "Allow system header to provide their own i...

[Amy Huang via All-commits]

  Branch: refs/heads/release/10.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 9007f06af0e009f41b876ae30e6b1ca96feee02e
      https://github.com/llvm/llvm-project/commit/9007f06af0e009f41b876ae30e6b1ca96feee02e
  Author: Amy Huang <akhuang at google.com>
  Date:   2020-01-17 (Fri, 17 Jan 2020)

  Changed paths:
    M clang/include/clang/AST/Decl.h
    M clang/lib/AST/Decl.cpp
    M clang/lib/CodeGen/CGExpr.cpp
    M clang/lib/CodeGen/CodeGenModule.cpp
    R clang/test/CodeGen/memcpy-nobuiltin.c
    R clang/test/CodeGen/memcpy-nobuiltin.inc

  Log Message:
  -----------
  Revert "Allow system header to provide their own implementation of some builtin"

This reverts commit 921f871ac438175ca8fcfcafdfcfac4d7ddf3905 because it
causes libc++ code to trigger __warn_memset_zero_len.

See https://reviews.llvm.org/D71082.

(cherry picked from commit 3d210ed3d1880c615776b07d1916edb400c245a6)