upstream/emscripten/system/lib/llvm-libc/src/string/memset_explicit.cpp

//===-- Implementation of memset_explicit ---------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "src/string/memset_explicit.h"
#include "src/__support/common.h"
#include "src/__support/macros/config.h"
#include "src/string/memory_utils/inline_memset.h"

namespace LIBC_NAMESPACE_DECL {

[[gnu::noinline]] LLVM_LIBC_FUNCTION(void *, memset_explicit,
                                     (void *dst, int value, size_t count)) {
  // Use the inline memset function to set the memory.
  inline_memset(dst, static_cast<uint8_t>(value), count);
  // avoid dead store elimination
  // The asm itself should also be sufficient to behave as a compiler barrier.
  asm("" : : "r"(dst) : "memory");
  return dst;
}

} // namespace LIBC_NAMESPACE_DECL