https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104632
--- Comment #2 from LIU Hao <lh_mouse at 126 dot com> --- I don't think it's a duplicate. This only happens when reading through a pointer by negative offsets. If I change the code to read by non-negative offsets, GCC is actually very happy about it: https://gcc.godbolt.org/z/sT9hzcndW ``` // In real code this was // `load_le32_backwards(::std::reverse_iterator<const unsigned char*> ptr) unsigned load_le32_backwards(const unsigned char* ptr) { unsigned word = ptr[3]; word = word << 8 | ptr[2]; word = word << 8 | ptr[1]; word = word << 8 | ptr[0]; return word; } ``` ``` load_le32_backwards(unsigned char const*): mov eax, DWORD PTR [rdi] ret ```
