llvm-project/clang/test/SemaCXX/align-x86-abi7.cpp
Richard Smith 6822bd79ac PR26547: alignof should return ABI alignment, not preferred alignment
Summary:
- Add `UETT_PreferredAlignOf` to account for the difference between `__alignof` and `alignof`
- `AlignOfType` now returns ABI alignment instead of preferred alignment iff clang-abi-compat > 7, and one uses _Alignof or alignof

Patch by Nicole Mazzuca!

Differential Revision: https://reviews.llvm.org/D53207

llvm-svn: 345419
2018-10-26 19:26:45 +00:00

26 lines
829 B
C++

// RUN: %clang_cc1 -std=c++11 -triple i386-apple-darwin9 -fsyntax-only -verify -fclang-abi-compat=7 %s
// expected-no-diagnostics
using size_t = decltype(sizeof(0));
template <typename T, size_t Preferred>
struct check_alignment {
using type = T;
static type value;
static_assert(__alignof__(value) == Preferred, "__alignof__(value) != Preferred");
static_assert(__alignof__(type) == Preferred, "__alignof__(type) != Preferred");
static_assert(alignof(type) == Preferred, "alignof(type) != Preferred");
};
// PR3433
template struct check_alignment<double, 8>;
template struct check_alignment<long long, 8>;
template struct check_alignment<unsigned long long, 8>;
// PR6362
template struct check_alignment<double[3], 8>;
enum big_enum { x = 18446744073709551615ULL };
template struct check_alignment<big_enum, 8>;