1*fe7f5f91SVitaly Buka; RUN: opt -passes='module(sancov-module)' -sanitizer-coverage-trace-pc -sanitizer-coverage-level=3 %s -S -o - | FileCheck %s 24914c983SNick Desaulniers 34914c983SNick Desaulniers; The edge between %entry and %for.inc.i is a critical edge. 44c186707SVitaly Buka; SanitizerCoveragePass must split this critical edge in order to track 54c186707SVitaly Buka; coverage of this edge. SanitizerCoveragePass will also insert calls to 64914c983SNick Desaulniers; @__sanitizer_cov_trace_pc using the debug location from the predecessor's 74914c983SNick Desaulniers; branch. but, if the branch itself is missing debug info (say, by accident 84914c983SNick Desaulniers; due to a bug in an earlier transform), we would fail a verifier check that 94914c983SNick Desaulniers; verifies calls to functions with debug info themselves have debug info. 104914c983SNick Desaulniers; The definition of @__sanitizer_cov_trace_pc may be visible during LTO. 114914c983SNick Desaulniers 124914c983SNick Desaulniers; Of the below checks, we really only care that the calls to 134914c983SNick Desaulniers; @__sanitizer_cov_trace_pc retain !dbg metadata. 144914c983SNick Desaulniers 156c8b173bSFangrui Songdefine void @update_shadow(i1 %c) !dbg !3 { 164914c983SNick Desaulniers; CHECK-LABEL: @update_shadow( 174914c983SNick Desaulniers; CHECK-NEXT: entry: 184914c983SNick Desaulniers; CHECK-NEXT: call void @__sanitizer_cov_trace_pc() #[[ATTR0:[0-9]+]], !dbg [[DBG6:![0-9]+]] 194914c983SNick Desaulniers; CHECK: entry.for.inc.i_crit_edge: 204914c983SNick Desaulniers; CHECK-NEXT: call void @__sanitizer_cov_trace_pc() #[[ATTR0]], !dbg [[DBG7:![0-9]+]] 214914c983SNick Desaulniers; CHECK: if.end22.i: 224914c983SNick Desaulniers; CHECK-NEXT: call void @__sanitizer_cov_trace_pc() #[[ATTR0]], !dbg [[DBG8:![0-9]+]] 234914c983SNick Desaulniers; CHECK: [[DBG6]] = !DILocation(line: 192, scope: !3) 244914c983SNick Desaulniers; CHECK: [[DBG7]] = !DILocation(line: 0, scope: !3) 254914c983SNick Desaulniers; CHECK: [[DBG8]] = !DILocation(line: 129, column: 2, scope: !3) 264914c983SNick Desaulniersentry: 276c8b173bSFangrui Song br i1 %c, label %for.inc.i, label %if.end22.i 284914c983SNick Desaulniers 294914c983SNick Desaulniersif.end22.i: ; preds = %entry 304914c983SNick Desaulniers br label %for.inc.i, !dbg !8 314914c983SNick Desaulniers 324914c983SNick Desaulniersfor.inc.i: ; preds = %if.end22.i, %entry 334914c983SNick Desaulniers ret void, !dbg !6 344914c983SNick Desaulniers} 354914c983SNick Desaulniers 364914c983SNick Desaulniersdefine void @__sanitizer_cov_trace_pc() !dbg !7{ 374914c983SNick Desaulniers ret void 384914c983SNick Desaulniers} 394914c983SNick Desaulniers 404914c983SNick Desaulniers!llvm.dbg.cu = !{!0} 414914c983SNick Desaulniers!llvm.module.flags = !{!2} 424914c983SNick Desaulniers 434914c983SNick Desaulniers!0 = distinct !DICompileUnit(language: DW_LANG_C89, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, splitDebugInlining: false, nameTableKind: None) 444914c983SNick Desaulniers!1 = !DIFile(filename: "kernel/cfi.c", directory: "") 454914c983SNick Desaulniers!2 = !{i32 2, !"Debug Info Version", i32 3} 464914c983SNick Desaulniers!3 = distinct !DISubprogram(name: "update_shadow", scope: !1, file: !1, line: 190, type: !4, scopeLine: 192, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0) 474914c983SNick Desaulniers!4 = !DISubroutineType(types: !5) 484914c983SNick Desaulniers!5 = !{} 494914c983SNick Desaulniers!6 = !DILocation(line: 223, column: 1, scope: !3) 504914c983SNick Desaulniers!7 = distinct !DISubprogram(name: "__sanitizer_cov_trace_pc", scope: !1, file: !1, line: 200, type: !4, scopeLine: 200, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0) 514914c983SNick Desaulniers!8 = !DILocation(line: 129, column: 2, scope: !3) 52