clang/test/CodeGenCXX/debug-info-struct-align.cpp

   1 //  Test for debug info related to DW_AT_alignment attribute in the struct type.
   2 // RUN: %clang_cc1 -dwarf-version=5 -debug-info-kind=standalone -S -emit-llvm %s -o - | FileCheck %s
   3
   4 // CHECK-DAG: DICompositeType(tag: DW_TAG_structure_type, name: "MyType", {{.*}}, align: 32
   5 // CHECK-DAG: DICompositeType(tag: DW_TAG_structure_type, name: "MyType1", {{.*}}, align: 8
   6 // CHECK-DAG: DICompositeType(tag: DW_TAG_structure_type, name: "MyType2", {{.*}}, align: 8
   7
   8 struct MyType {
   9   int m;
  10 } __attribute__((aligned(1)));
  11 MyType mt;
  12
  13 static_assert(alignof(MyType) == 4, "alignof MyType is wrong");
  14
  15 struct MyType1 {
  16   int m;
  17 } __attribute__((packed, aligned(1)));
  18 MyType1 mt1;
  19
  20 static_assert(alignof(MyType1) == 1, "alignof MyType1 is wrong");
  21
  22 struct MyType2 {
  23   __attribute__((packed)) int m;
  24 } __attribute__((aligned(1)));
  25 MyType2 mt2;
  26
  27 static_assert(alignof(MyType2) == 1, "alignof MyType2 is wrong");