1 /// -fprofile-update=atomic (implied by -fsanitize=thread) requires the
2 /// (potentially concurrent) counter updates to be atomic.
3 // RUN: %clang_cc1 -no-opaque-pointers %s -triple x86_64 -emit-llvm -fprofile-update=atomic -ftest-coverage -fprofile-arcs \
4 // RUN:   -coverage-notes-file /dev/null -coverage-data-file /dev/null -o - | FileCheck %s
5 
6 // CHECK-LABEL: void @foo()
7 /// Two counters are incremented by __tsan_atomic64_fetch_add.
8 // CHECK:         atomicrmw add i64* {{.*}} @__llvm_gcov_ctr{{.*}} monotonic, align 8
9 // CHECK-NEXT:    atomicrmw sub i32*
10 
11 _Atomic(int) cnt;
12 void foo(void) { cnt--; }
13