test/FrontendC/2010-01-13-MemBarrier.c

   1 // RUN: %llvmgcc %s -S -o - | FileCheck %s
   2 // XFAIL: sparc
   3 // rdar://7536390
   4
   5 unsigned t(unsigned *ptr, unsigned val) {
   6   // CHECK:      @t
   7   // CHECK:      call void @llvm.memory.barrier
   8   // CHECK-NEXT: call i32 @llvm.atomic.swap.i32
   9   // CHECK-NEXT: call void @llvm.memory.barrier
  10   return __sync_lock_test_and_set(ptr, val);
  11 }