File: warn-new-overaligned-3.cpp

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (33 lines) | stat: -rw-r--r-- 888 bytes parent folder | download | duplicates (26) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
 
// RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -Wover-aligned %s -isystem %S/Inputs -verify

// This test ensures that we still get the warning even if we #include <new>
// where the header here simulates <new>.
#include <warn-new-overaligned-3.h>

namespace test1 {
struct Test {
  template <typename T>
  struct SeparateCacheLines {
    T data;
  } __attribute__((aligned(256)));

  SeparateCacheLines<int> high_contention_data[10];
};

void helper() {
  Test t;
  new Test;  // expected-warning {{type 'test1::Test' requires 256 bytes of alignment and the default allocator only guarantees}}
  new Test[10];  // expected-warning {{type 'test1::Test' requires 256 bytes of alignment and the default allocator only guarantees}}
}
}

namespace test2 {
struct helper { int i __attribute__((aligned(256))); };

struct Placement {
  Placement() {
    new (d) helper();
  }
  helper *d;
};
}