1; RUN: opt -S -lcssa < %s | FileCheck %s
2
3target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
4target triple = "x86_64-unknown-linux-gnu"
5
6; Reproducer for PR39019.
7;
8; Verify that the llvm.dbg.value in the %for.cond.cleanup2 block is rewritten
9; to use the PHI node for %add that is created by LCSSA.
10
11; CHECK-LABEL: for.cond.cleanup2:
12; CHECK-NEXT: [[PN:%[^ ]*]] = phi i32 [ %add.lcssa, %for.cond.cleanup1 ]
13; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 [[PN]], metadata [[VAR:![0-9]+]], metadata !DIExpression())
14; CHECK-NEXT: call void @bar(i32 [[PN]])
15
16; CHECK-LABEL: for.body:
17; CHECK: %add = add nsw i32 0, 2
18; CHECK: call void @llvm.dbg.value(metadata i32 %add, metadata [[VAR]], metadata !DIExpression())
19
20; CHECK: [[VAR]] = !DILocalVariable(name: "sum",
21
22; Function Attrs: nounwind
23define void @foo() #0 !dbg !6 {
24entry:
25  br label %for.cond.preheader, !dbg !12
26
27for.cond.preheader:                               ; preds = %for.cond.cleanup1, %entry
28  br label %for.body, !dbg !12
29
30for.cond.cleanup2:                                ; preds = %for.cond.cleanup1
31  call void @llvm.dbg.value(metadata i32 %add, metadata !9, metadata !DIExpression()), !dbg !12
32  tail call void @bar(i32 %add) #0, !dbg !12
33  ret void, !dbg !12
34
35for.cond.cleanup1:                                ; preds = %for.body
36  br i1 false, label %for.cond.preheader, label %for.cond.cleanup2, !dbg !12
37
38for.body:                                         ; preds = %for.body, %for.cond.preheader
39  %add = add nsw i32 0, 2, !dbg !12
40  call void @llvm.dbg.value(metadata i32 %add, metadata !9, metadata !DIExpression()), !dbg !12
41  br i1 false, label %for.body, label %for.cond.cleanup1, !dbg !12
42}
43
44; Function Attrs: nounwind
45declare void @bar(i32) #0
46
47; Function Attrs: nounwind readnone speculatable
48declare void @llvm.dbg.value(metadata, metadata, metadata) #1
49
50attributes #0 = { nounwind }
51attributes #1 = { nounwind readnone speculatable }
52
53!llvm.dbg.cu = !{!0}
54!llvm.module.flags = !{!3, !4}
55!llvm.ident = !{!5}
56
57!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 8.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !2)
58!1 = !DIFile(filename: "foo.c", directory: "/")
59!2 = !{}
60!3 = !{i32 2, !"Dwarf Version", i32 4}
61!4 = !{i32 2, !"Debug Info Version", i32 3}
62!5 = !{!"clang version 8.0.0"}
63!6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 10, type: !7, isLocal: false, isDefinition: true, scopeLine: 10, isOptimized: true, unit: !0, retainedNodes: !8)
64!7 = !DISubroutineType(types: !2)
65!8 = !{!9}
66!9 = !DILocalVariable(name: "sum", scope: !10, file: !1, line: 11, type: !11)
67!10 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 0)
68!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
69!12 = !DILocation(line: 0, scope: !10)
70