test/CodeGen/atomic_ops.c


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// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s

void foo(int x)
{
  _Atomic(int) i = 0;
  _Atomic(short) j = 0;
  // Check that multiply / divides on atomics produce a cmpxchg loop
  i *= 2;
  // CHECK: mul nsw i32
  // CHECK: {{(cmpxchg i32*|i1 @__atomic_compare_exchange\(i32 4,)}}
  i /= 2;
  // CHECK: sdiv i32
  // CHECK: {{(cmpxchg i32*|i1 @__atomic_compare_exchange\(i32 4, )}}
  j /= x;
  // CHECK: sdiv i32
  // CHECK: {{(cmpxchg i16*|i1 @__atomic_compare_exchange\(i32 2, )}}

}