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      1 ; RUN: opt -simplifycfg -S < %s | FileCheck %s
      2 ; Verify that we don't crash due an invalid !dbg location on the hoisted llvm.dbg.value
      3 
      4 define i64 @caller(i64* %ptr, i64 %flag) !dbg !10 {
      5 init:
      6   %v9 = icmp eq i64 %flag, 0
      7   br i1 %v9, label %a, label %b
      8 
      9 ; CHECK:  %vala = load i64, i64* %ptr
     10 ; CHECK-NEXT:  call void @llvm.dbg.value(metadata i64 %vala, metadata [[MD:![0-9]*]]
     11 ; CHECK-NEXT:  call void @llvm.dbg.value(metadata i64 %vala, metadata [[MD]]
     12 ; CHECK-NEXT:  %valbmasked = and i64 %vala, 1
     13 
     14 a:                                              ; preds = %init
     15   %vala = load i64, i64* %ptr, align 8
     16   call void @llvm.dbg.value(metadata i64 %vala, metadata !8, metadata !DIExpression()), !dbg !12
     17   br label %test.exit
     18 
     19 b:                                              ; preds = %init
     20   %valb = load i64, i64* %ptr, align 8
     21   call void @llvm.dbg.value(metadata i64 %valb, metadata !8, metadata !DIExpression()), !dbg !13
     22   %valbmasked = and i64 %valb, 1
     23   br label %test.exit
     24 
     25 test.exit:                                      ; preds = %a, %b
     26   %retv = phi i64 [ %vala, %a ], [ %valbmasked, %b ]
     27   ret i64 %retv
     28 }
     29 
     30 ; Function Attrs: nounwind readnone speculatable
     31 declare void @llvm.dbg.value(metadata, metadata, metadata) #0
     32 
     33 attributes #0 = { nounwind readnone speculatable }
     34 
     35 !llvm.module.flags = !{!0}
     36 !llvm.dbg.cu = !{!1}
     37 
     38 !0 = !{i32 2, !"Debug Info Version", i32 3}
     39 !1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !3)
     40 !2 = !DIFile(filename: "optbug", directory: "")
     41 !3 = !{}
     42 !4 = distinct !DISubprogram(name: "callee", scope: !2, file: !2, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: false, unit: !1, retainedNodes: !7)
     43 !5 = !DISubroutineType(types: !6)
     44 !6 = !{null}
     45 !7 = !{!8}
     46 !8 = !DILocalVariable(name: "var", scope: !4, file: !2, type: !9)
     47 !9 = !DIBasicType(name: "var_t", size: 64, encoding: DW_ATE_unsigned)
     48 !10 = distinct !DISubprogram(name: "caller", scope: !2, file: !2, line: 5, type: !5, isLocal: false, isDefinition: true, scopeLine: 5, isOptimized: false, unit: !1, retainedNodes: !3)
     49 !11 = distinct !DILocation(line: 6, scope: !10)
     50 !12 = !DILocation(line: 2, scope: !4, inlinedAt: !11)
     51 !13 = !DILocation(line: 3, scope: !4, inlinedAt: !11)
     52