1 ; RUN: opt -passes=jump-threading -S %s -o - | FileCheck %s
2 define void @prepare_next_shadow() !dbg !7 {
4 br label %for.cond, !dbg !9
6 for.cond: ; preds = %for.inc, %entry
7 br label %shadow_to_ptr.exit, !dbg !10
9 shadow_to_ptr.exit: ; preds = %for.cond
10 %shr.i = lshr i64 0, 12, !dbg !11
11 %cmp.i = icmp ult i64 %shr.i, undef, !dbg !12
12 br i1 %cmp.i, label %cleanup.i, label %if.end.i60, !dbg !13
14 if.end.i60: ; preds = %shadow_to_ptr.exit
15 %sub.i = sub i64 %shr.i, undef, !dbg !14
16 %cmp3.i = icmp ugt i64 %sub.i, 32763, !dbg !15
17 %conv7.i = trunc i64 %sub.i to i32, !dbg !16
18 %spec.select.i = select i1 %cmp3.i, i32 -1, i32 %conv7.i, !dbg !17
19 ; Jump threading is going to fold the select in to the branch. Ensure debug
20 ; info is not lost, and is merged from the select and the branch.
21 ; CHECK-NOT: br i1 %cmp3.i, label %for.inc, label %ptr_to_shadow.exit
22 ; CHECK: br i1 %cmp3.i, label %for.inc, label %ptr_to_shadow.exit, !dbg [[DBG:![0-9]+]]
23 ; CHECK: [[DBG]] = !DILocation(line: 9, column: 1, scope: !{{.*}})
25 br label %ptr_to_shadow.exit, !dbg !17
27 cleanup.i: ; preds = %shadow_to_ptr.exit
28 br label %ptr_to_shadow.exit, !dbg !19
30 ptr_to_shadow.exit: ; preds = %cleanup.i, %if.end.i60
31 %call1861 = phi i32 [ %spec.select.i, %if.end.i60 ], [ -1, %cleanup.i ], !dbg !20
32 %cmp19 = icmp slt i32 %call1861, 0, !dbg !21
33 br i1 %cmp19, label %for.inc, label %if.end22, !dbg !22
35 if.end22: ; preds = %ptr_to_shadow.exit
38 for.inc: ; preds = %ptr_to_shadow.exit
39 br label %for.cond, !dbg !24
44 !llvm.debugify = !{!4, !5}
45 !llvm.module.flags = !{!6}
48 !1 = distinct !DICompileUnit(language: DW_LANG_C, file: !2, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !3)
49 !2 = !DIFile(filename: "jump_threading.ll", directory: "/")
53 !6 = !{i32 2, !"Debug Info Version", i32 3}
54 !7 = distinct !DISubprogram(name: "prepare_next_shadow", linkageName: "prepare_next_shadow", scope: null, file: !2, line: 1, type: !8, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !1, retainedNodes: !3)
55 !8 = !DISubroutineType(types: !3)
56 !9 = !DILocation(line: 1, column: 1, scope: !7)
57 !10 = !DILocation(line: 2, column: 1, scope: !7)
58 !11 = !DILocation(line: 3, column: 1, scope: !7)
59 !12 = !DILocation(line: 4, column: 1, scope: !7)
60 !13 = !DILocation(line: 5, column: 1, scope: !7)
61 !14 = !DILocation(line: 6, column: 1, scope: !7)
62 !15 = !DILocation(line: 7, column: 1, scope: !7)
63 !16 = !DILocation(line: 8, column: 1, scope: !7)
64 !17 = !DILocation(line: 9, column: 1, scope: !7)
65 !19 = !DILocation(line: 11, column: 1, scope: !7)
66 !20 = !DILocation(line: 12, column: 1, scope: !7)
67 !21 = !DILocation(line: 13, column: 1, scope: !7)
68 !22 = !DILocation(line: 14, column: 1, scope: !7)
69 !23 = !DILocation(line: 15, column: 1, scope: !7)
70 !24 = !DILocation(line: 16, column: 1, scope: !7)