1;; -fsanitize=thread requires the (potentially concurrent) counter updates to be atomic. 2; RUN: mkdir -p %t && cd %t 3; RUN: opt < %s -S -passes=insert-gcov-profiling -gcov-atomic-counter | FileCheck %s 4 5; CHECK-LABEL: void @empty() 6; CHECK-NEXT: entry: 7; CHECK-NEXT: %0 = atomicrmw add ptr @__llvm_gcov_ctr, i64 1 monotonic, align 8, !dbg [[DBG:![0-9]+]] 8; CHECK-NEXT: ret void, !dbg [[DBG]] 9 10define dso_local void @empty() !dbg !5 { 11entry: 12 ret void, !dbg !8 13} 14 15!llvm.dbg.cu = !{!0} 16!llvm.module.flags = !{!3, !4} 17 18!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, emissionKind: FullDebug, enums: !2) 19!1 = !DIFile(filename: "a.c", directory: "") 20!2 = !{} 21!3 = !{i32 7, !"Dwarf Version", i32 5} 22!4 = !{i32 2, !"Debug Info Version", i32 3} 23!5 = distinct !DISubprogram(name: "empty", scope: !1, file: !1, line: 1, type: !6, scopeLine: 1, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2) 24!6 = !DISubroutineType(types: !7) 25!7 = !{null} 26!8 = !DILocation(line: 2, column: 1, scope: !5) 27