https://bugs.llvm.org/show_bug.cgi?id=39713
Bug ID: 39713
Summary: std::alignment_of<T>::value might be different from
alignof(T)
Product: libc++
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: sbe...@google.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
Simple repro:
#include <type_traits>
static_assert(alignof(long long) == std::alignment_of<long long>::value);
With compiler flags: -std=c++17 -m32 -stdlib=libc++
alignof(long long) == 4
std::alignment_of<long long>::value == 8
The problem is that std::alignment_of is using __alignof__ which gives a
different result than alignof in this particular case.
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