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      1 ; RUN: llc -stop-after=early-tailduplication < %s | FileCheck %s
      2 ;
      3 ; Check that DebugLoc attached to the branch instruction of
      4 ; 'while.cond1.preheader.lr.ph' survives after tailduplication pass.
      5 ;
      6 ; CHECK: [[DLOC:![0-9]+]] = !DILocation(line: 9, column: 5, scope: !{{[0-9]+}})
      7 ; CHECK: [[VREG:%[^ ]+]]:gr64 = COPY $rdi
      8 ; CHECK: TEST64rr [[VREG]], [[VREG]]
      9 ; CHECK-NEXT: JE_1 {{.+}}, debug-location [[DLOC]]
     10 ; CHECK-NEXT: JMP_1 {{.+}}, debug-location [[DLOC]]
     11 
     12 target triple = "x86_64-unknown-linux-gnu"
     13 
     14 %struct.Node = type { %struct.Node* }
     15 
     16 define i32 @foo(%struct.Node* readonly %node, %struct.Node* readnone %root) !dbg !6 {
     17 entry:
     18   %cmp = icmp eq %struct.Node* %node, %root, !dbg !8
     19   br i1 %cmp, label %while.end4, label %while.cond1.preheader.lr.ph, !dbg !10
     20 
     21 while.cond1.preheader.lr.ph:                      ; preds = %entry
     22   %tobool = icmp eq %struct.Node* %node, null
     23   br i1 %tobool, label %while.cond1.preheader.us.preheader, label %while.body2.preheader, !dbg !11
     24 
     25 while.body2.preheader:                            ; preds = %while.cond1.preheader.lr.ph
     26   br label %while.body2, !dbg !11
     27 
     28 while.cond1.preheader.us.preheader:               ; preds = %while.cond1.preheader.lr.ph
     29   br label %while.cond1.preheader.us, !dbg !10
     30 
     31 while.cond1.preheader.us:                         ; preds = %while.cond1.preheader.us.preheader, %while.cond1.preheader.us
     32   br label %while.cond1.preheader.us, !dbg !10
     33 
     34 while.body2:                                      ; preds = %while.body2.preheader, %while.body2
     35   br label %while.body2, !dbg !11
     36 
     37 while.end4:                                       ; preds = %entry
     38   ret i32 0, !dbg !12
     39 }
     40 
     41 !llvm.dbg.cu = !{!0}
     42 !llvm.module.flags = !{!3, !4}
     43 
     44 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: true, emissionKind: LineTablesOnly)
     45 !1 = !DIFile(filename: "foo.c", directory: "b/")
     46 !2 = !{}
     47 !3 = !{i32 2, !"Dwarf Version", i32 4}
     48 !4 = !{i32 2, !"Debug Info Version", i32 3}
     49 !5 = !{}
     50 !6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 5, type: !7, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
     51 !7 = !DISubroutineType(types: !2)
     52 !8 = !DILocation(line: 7, column: 15, scope: !9)
     53 !9 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 2)
     54 !10 = !DILocation(line: 7, column: 3, scope: !9)
     55 !11 = !DILocation(line: 9, column: 5, scope: !9)
     56 !12 = !DILocation(line: 14, column: 3, scope: !6)
     57