[llvm-bugs] [Bug 50221] New: clang does not respect alignas

via llvm-bugs llvm-bugs at lists.llvm.org
Tue May 4 13:30:32 PDT 2021


https://bugs.llvm.org/show_bug.cgi?id=50221

            Bug ID: 50221
           Summary: clang does not respect alignas
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: vitalybuka at google.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

https://godbolt.org/z/b8nqodchG


#include <stdio.h>

struct alignas(4096) AAA {

int x;
struct alignas(4096) SizeClassInfo {
};

SizeClassInfo aa;
int y;
};


void* p;
int s = sizeof(AAA);

int main() {
    p = new AAA();
    printf("%p\n", p);
}

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