1 ; RUN: opt -passes='module(sancov-module)' -sanitizer-coverage-trace-pc \
2 ; RUN: -sanitizer-coverage-level=3 %s -S -o - | FileCheck %s
4 ; The edge between %entry and %for.inc.i is a critical edge.
5 ; SanitizerCoveragePass must split this critical edge in order to track
6 ; coverage of this edge. SanitizerCoveragePass will also insert calls to
7 ; @__sanitizer_cov_trace_pc using the debug location from the predecessor's
8 ; branch. but, if the branch itself is missing debug info (say, by accident
9 ; due to a bug in an earlier transform), we would fail a verifier check that
10 ; verifies calls to functions with debug info themselves have debug info.
11 ; The definition of @__sanitizer_cov_trace_pc may be visible during LTO.
13 ; Of the below checks, we really only care that the calls to
14 ; @__sanitizer_cov_trace_pc retain !dbg metadata.
16 define void @update_shadow(i1 %c) !dbg !3 {
17 ; CHECK-LABEL: @update_shadow(
19 ; CHECK-NEXT: call void @__sanitizer_cov_trace_pc() #[[ATTR0:[0-9]+]], !dbg [[DBG6:![0-9]+]]
20 ; CHECK: entry.for.inc.i_crit_edge:
21 ; CHECK-NEXT: call void @__sanitizer_cov_trace_pc() #[[ATTR0]], !dbg [[DBG7:![0-9]+]]
23 ; CHECK-NEXT: call void @__sanitizer_cov_trace_pc() #[[ATTR0]], !dbg [[DBG8:![0-9]+]]
24 ; CHECK: [[DBG6]] = !DILocation(line: 192, scope: !3)
25 ; CHECK: [[DBG7]] = !DILocation(line: 0, scope: !3)
26 ; CHECK: [[DBG8]] = !DILocation(line: 129, column: 2, scope: !3)
28 br i1 %c, label %for.inc.i, label %if.end22.i
30 if.end22.i: ; preds = %entry
31 br label %for.inc.i, !dbg !8
33 for.inc.i: ; preds = %if.end22.i, %entry
37 define void @__sanitizer_cov_trace_pc() !dbg !7{
42 !llvm.module.flags = !{!2}
44 !0 = distinct !DICompileUnit(language: DW_LANG_C89, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, splitDebugInlining: false, nameTableKind: None)
45 !1 = !DIFile(filename: "kernel/cfi.c", directory: "")
46 !2 = !{i32 2, !"Debug Info Version", i32 3}
47 !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)
48 !4 = !DISubroutineType(types: !5)
50 !6 = !DILocation(line: 223, column: 1, scope: !3)
51 !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)
52 !8 = !DILocation(line: 129, column: 2, scope: !3)