/// -fprofile-update=atomic 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--; } |