clang/test/SemaCXX/warn-new-overaligned-3.cpp

   1 // RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -Wover-aligned %s -isystem %S/Inputs -verify
   2
   3 // This test ensures that we still get the warning even if we #include <new>
   4 // where the header here simulates <new>.
   5 #include <warn-new-overaligned-3.h>
   6
   7 namespace test1 {
   8 struct Test {
   9   template <typename T>
  10   struct SeparateCacheLines {
  11     T data;
  12   } __attribute__((aligned(256)));
  13
  14   SeparateCacheLines<int> high_contention_data[10];
  15 };
  16
  17 void helper() {
  18   Test t;
  19   new Test;  // expected-warning {{type 'Test' requires 256 bytes of alignment and the default allocator only guarantees}}
  20   new Test[10];  // expected-warning {{type 'Test' requires 256 bytes of alignment and the default allocator only guarantees}}
  21 }
  22 }
  23
  24 namespace test2 {
  25 struct helper { int i __attribute__((aligned(256))); };
  26
  27 struct Placement {
  28   Placement() {
  29     new (d) helper();
  30   }
  31   helper *d;
  32 };
  33 }