问builtin_memcpy警告在linux上而不是在windows上EN在试图复制大于" string“变量的字符串时，我知道为什...
While implementing C++20 constexpr char_traits copy()/move(), we can use Clang/LLVM’s support for __builtin_memcpy and __builtin_memmove, documented at https://clang.llvm.org/docs/LanguageExtensions.html#memory-builtins . These compiler builtins are usable in constant expressions; at ...
使用clang,如上编译之后,启动的时候,会发生memcpy的递归调用,从而发生栈溢出。 原因: 在src/glibc-compatibility/memcpy/memcpy_x86_64.cpp中,自定义的memcpy调用了__builtin_memcpy,而__builtin_memcpy被编译器优化为memcpy,从而产生循环调用。 stackoverflow相关问题 该问题只在指定TSAN + -O0时出现,修改为-O1,...
This is a correctness issue: When -fno-builtin is used, we must assume that we could be compiling the memcpy/memset implementations, so generating calls to them is problematic. Benchmark 1 (3 runs): ./release/bin/zig build -Doptimize=ReleaseFast -Dno-lib -Denable-llvm=false -Duse-llvm...