1 ; RUN: opt < %s -instcombine -S | FileCheck %s
3 ; When removing the llvm.dbg.value intrinsic in the unreachable block
4 ; InstCombine would incorrectly return a false Modified status.
7 ; CHECK-NEXT: br label %cond.end
9 define i32 @foo() !dbg !7 {
11 br i1 false, label %cond.true, label %cond.end
14 call void @llvm.dbg.value(metadata i32 undef, metadata !12, metadata !DIExpression()), !dbg !13
21 declare void @llvm.dbg.value(metadata, metadata, metadata) #0
23 attributes #0 = { nounwind readnone speculatable willreturn }
26 !llvm.module.flags = !{!3, !4}
29 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
30 !1 = !DIFile(filename: "foo.c", directory: "/")
32 !3 = !{i32 7, !"Dwarf Version", i32 4}
33 !4 = !{i32 2, !"Debug Info Version", i32 3}
34 !6 = !{!"clang version 12.0.0"}
35 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
36 !8 = !DISubroutineType(types: !9)
38 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
40 !12 = !DILocalVariable(name: "bar", scope: !7, file: !1, line: 1, type: !10)
41 !13 = !DILocation(line: 0, scope: !7)