llvm-capstone/clang/test/Layout/ms_struct-bitfields.c
John McCall 0d461693b6 Fix the layout of bitfields in ms_struct unions: their
alignment is ignored, and they always allocate a complete
storage unit.

Also, change the dumping of AST record layouts: use the more
readable C++-style dumping even in C, include bitfield offset
information in the dump, and don't print sizeof/alignof
information for fields of record type, since we don't do so
for bases or other kinds of field.

rdar://22275433

llvm-svn: 245514
2015-08-19 22:42:36 +00:00

49 lines
1.3 KiB
C

// RUN: %clang_cc1 -emit-llvm-only -triple armv7-apple-darwin -fdump-record-layouts %s 2>/dev/null \
// RUN: | FileCheck %s
// rdar://22275433
#pragma ms_struct on
union A {
unsigned long long x : 32;
unsigned long long y : 32;
} a;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | union A
// CHECK-NEXT: 0:0-31 | unsigned long long x
// CHECK-NEXT: 0:0-31 | unsigned long long y
// CHECK-NEXT: | [sizeof=8, align=1]
union B {
__attribute__((aligned(4)))
unsigned long long x : 32;
unsigned long long y : 32;
} b;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | union B
// CHECK-NEXT: 0:0-31 | unsigned long long x
// CHECK-NEXT: 0:0-31 | unsigned long long y
// CHECK-NEXT: | [sizeof=8, align=1]
union C {
unsigned long long : 0;
unsigned short y : 8;
} c;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | union C
// CHECK-NEXT: 0:- | unsigned long long
// CHECK-NEXT: 0:0-7 | unsigned short y
// CHECK-NEXT: | [sizeof=2, align=1]
union D {
unsigned long long : 0;
unsigned short : 0;
} d;
// CHECK:*** Dumping AST Record Layout
// CHECK-NEXT: 0 | union D
// CHECK-NEXT: 0:- | unsigned long long
// CHECK-NEXT: 0:- | unsigned short
// CHECK-NEXT: | [sizeof=1, align=1]