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      1 // RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
      2 // XFAIL: sparc
      3 // rdar://7536390
      4 
      5 typedef unsigned __INT32_TYPE__ uint32_t;
      6 
      7 unsigned t(uint32_t *ptr, uint32_t val) {
      8   // CHECK:      @t
      9   // CHECK: atomicrmw xchg i32* {{.*}} seq_cst
     10   return __sync_lock_test_and_set(ptr, val);
     11 }
     12