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// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
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// rdar://7536390
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typedef unsigned __INT32_TYPE__ uint32_t;
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unsigned t(uint32_t *ptr, uint32_t val) {
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// CHECK: @t
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// CHECK: atomicrmw xchg i32* {{.*}} seq_cst
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return __sync_lock_test_and_set(ptr, val);
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}
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