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/// -fprofile-update=atomic (implied by -fsanitize=thread) requires the
/// (potentially concurrent) counter updates to be atomic.
// RUN: %clang_cc1 %s -triple x86_64 -emit-llvm -fprofile-update=atomic \
// RUN: -coverage-notes-file /dev/null -coverage-data-file /dev/null -o - | FileCheck %s
// CHECK-LABEL: void @foo()
/// Two counters are incremented by __tsan_atomic64_fetch_add.
// CHECK: atomicrmw add ptr @__llvm_gcov_ctr{{.*}} monotonic, align 8
// CHECK-NEXT: atomicrmw sub ptr
_Atomic(int) cnt;
void foo(void) { cnt--; }
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