clang/test/SemaCXX/alignment-of-derived-class.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++11
   2 // expected-no-diagnostics
   3
   4 // Test that the alignment of a empty direct base class is correctly
   5 // inherited by the derived class, and correctly not inherited on PS4/PS5.
   6
   7 struct A {
   8 } __attribute__ ((aligned(16)));
   9
  10 static_assert(__alignof(A) == 16, "A should be aligned to 16 bytes");
  11
  12 struct B1 : public A {
  13 };
  14
  15 #if defined(__SCE__)
  16 static_assert(__alignof(B1) == 1, "B1 should be aligned to 1 byte");
  17 #else
  18 static_assert(__alignof(B1) == 16, "B1 should be aligned to 16 bytes");
  19 #endif
  20
  21 struct B2 : public A {
  22 } __attribute__ ((aligned(2)));
  23
  24 #if defined(__SCE__)
  25 static_assert(__alignof(B2) == 2, "B2 should be aligned to 2 bytes");
  26 #else
  27 static_assert(__alignof(B2) == 16, "B2 should be aligned to 16 bytes");
  28 #endif
  29
  30 struct B3 : public A {
  31 } __attribute__ ((aligned(4)));
  32
  33 #if defined(__SCE__)
  34 static_assert(__alignof(B3) == 4, "B3 should be aligned to 4 bytes");
  35 #else
  36 static_assert(__alignof(B3) == 16, "B3 should be aligned to 16 bytes");
  37 #endif
  38
  39 struct B4 : public A {
  40 } __attribute__ ((aligned(8)));
  41
  42 #if defined(__SCE__)
  43 static_assert(__alignof(B4) == 8, "B4 should be aligned to 8 bytes");
  44 #else
  45 static_assert(__alignof(B4) == 16, "B4 should be aligned to 16 bytes");
  46 #endif
  47
  48 struct B5 : public A {
  49 } __attribute__ ((aligned(16)));
  50
  51 static_assert(__alignof(B5) == 16, "B5 should be aligned to 16 bytes");
  52
  53 struct B6 : public A {
  54 } __attribute__ ((aligned(32)));
  55
  56 static_assert(__alignof(B6) == 32, "B6 should be aligned to 32 bytes");
  57