1 // RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
2
foo(int x)3 void foo(int x)
4 {
5 _Atomic(int) i = 0;
6 _Atomic(short) j = 0;
7 // Check that multiply / divides on atomics produce a cmpxchg loop
8 i *= 2;
9 // CHECK: mul nsw i32
10 // CHECK: {{(cmpxchg i32*|i1 @__atomic_compare_exchange\(i32 4,)}}
11 i /= 2;
12 // CHECK: sdiv i32
13 // CHECK: {{(cmpxchg i32*|i1 @__atomic_compare_exchange\(i32 4, )}}
14 j /= x;
15 // CHECK: sdiv i32
16 // CHECK: {{(cmpxchg i16*|i1 @__atomic_compare_exchange\(i32 2, )}}
17
18 }
19