ms-aligned-array.c
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// RUN: %clang_cc1 -fno-rtti -emit-llvm-only -triple x86_64-pc-win32 -fms-extensions -fdump-record-layouts -fsyntax-only %s 2>/dev/null \
// RUN: | FileCheck %s -check-prefix CHECK
// Before PR45420, we would only find the alignment on this record. Afterwards,
// we can see the alignment on the typedef through the array type.
// FIXME: What about other type sugar, like _Atomic? This would only matter in a
// packed struct context.
struct __declspec(align(16)) AlignedStruct { int x; };
typedef int __declspec(align(16)) AlignedInt;
#define CHECK_SIZE(X, Align) \
_Static_assert(__alignof(struct X) == Align, "should be aligned");
#pragma pack(push, 2)
struct A {
struct AlignedStruct a[1];
};
CHECK_SIZE(A, 16);
struct B {
char b;
AlignedInt a[1];
};
CHECK_SIZE(B, 16);
struct C {
char b;
AlignedInt a[];
};
CHECK_SIZE(C, 16);
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct AlignedStruct
// CHECK-NEXT: 0 | int x
// CHECK-NEXT: | [sizeof=16, align=16]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct A
// CHECK-NEXT: 0 | struct AlignedStruct [1] a
// CHECK-NEXT: | [sizeof=16, align=16]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct B
// CHECK-NEXT: 0 | char b
// CHECK-NEXT: 16 | AlignedInt [1] a
// CHECK-NEXT: | [sizeof=32, align=16]
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct C
// CHECK-NEXT: 0 | char b
// CHECK-NEXT: 16 | AlignedInt [] a
// CHECK-NEXT: | [sizeof=16, align=16]
#pragma pack(pop)