clang/test/SemaCXX/array-alignment.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2
   3 typedef char __attribute__((aligned(2))) AlignedChar;
   4 typedef AlignedChar arrayType0[4]; // expected-error {{size of array element}}
   5
   6 struct __attribute__((aligned(8))) AlignedStruct {
   7   int m0;
   8 };
   9
  10 struct __attribute__((packed)) PackedStruct {
  11   char m0;
  12   int i0;
  13 };
  14
  15 typedef PackedStruct AlignedPackedStruct __attribute__((aligned(4)));
  16 typedef AlignedPackedStruct arrayType1[4]; // expected-error {{(5 bytes) isn't a multiple of its alignment (4 bytes)}}
  17
  18 AlignedChar a0[1]; // expected-error {{size of array element}}
  19 AlignedStruct a1[1];
  20 AlignedPackedStruct a2[1]; // expected-error {{size of array element}}
  21
  22 struct S {
  23   AlignedChar m0[1]; // expected-error {{size of array element}}
  24   AlignedStruct m1[1];
  25   AlignedPackedStruct m2[1]; // expected-error {{size of array element}}
  26 };
  27
  28 void test(char *p) {
  29   auto p0 = (AlignedChar(*)[1])p;    // expected-error {{size of array element}}
  30   auto r0 = (AlignedChar(&)[1])(*p); // expected-error {{size of array element}}
  31   auto p1 = new AlignedChar[1];      // expected-error {{size of array element}}
  32   auto p2 = (AlignedStruct(*)[1])p;
  33   auto p3 = new AlignedStruct[1];
  34   auto p4 = (AlignedPackedStruct(*)[1])p; // expected-error {{size of array element}}
  35   auto p5 = new AlignedPackedStruct[1]; // expected-error {{size of array element}}
  36   auto p6 = new AlignedPackedStruct;
  37 }