clang/test/CodeGen/SystemZ/sync-builtins-i128-8Al.c

   1 // RUN: %clang_cc1 -triple s390x-linux-gnu -O1 -emit-llvm %s -o - 2>&1 | FileCheck %s
   2 //
   3 // Test that an underaligned 16 byte __sync gives a warning.
   4
   5 #include <stdint.h>
   6
   7 __int128 Ptr __attribute__((aligned(8)));
   8
   9 __int128 f1() {
  10 // CHECK: warning: __sync builtin operation MUST have natural alignment (consider using __atomic). [-Wsync-alignment]
  11   return __sync_fetch_and_add(&Ptr, 1);
  12 }
  13
  14 __int128 f2() {
  15 // CHECK: warning: __sync builtin operation MUST have natural alignment (consider using __atomic). [-Wsync-alignment]
  16   return __sync_sub_and_fetch(&Ptr, 1);
  17 }
  18
  19 __int128 f3() {
  20 // CHECK: warning: __sync builtin operation MUST have natural alignment (consider using __atomic). [-Wsync-alignment]
  21   return __sync_val_compare_and_swap(&Ptr, 0, 1);
  22 }
  23
  24 void f4() {
  25 // CHECK: warning: __sync builtin operation MUST have natural alignment (consider using __atomic). [-Wsync-alignment]
  26   __sync_lock_release(&Ptr);
  27 }