1; RUN: opt -analyze -enable-new-pm=0 -scalar-evolution < %s | FileCheck %s
2; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
3
4; Make sure poison value tracking works in the presence of @llvm.dbg
5; intrinsics.  Unfortunately, I was not able to reduce this file
6; further while still keeping the debug info well formed.
7
8define void @foo(i32 %n, i32* %arr) !dbg !7 {
9; CHECK-LABEL: Classifying expressions for: @foo
10entry:
11  %cmp1 = icmp slt i32 0, %n, !dbg !12
12  br i1 %cmp1, label %for.body.lr.ph, label %for.end, !dbg !15
13
14for.body.lr.ph:                                   ; preds = %entry
15  br label %for.body, !dbg !15
16
17for.body:                                         ; preds = %for.inc, %for.body.lr.ph
18  %i.02 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
19  %add = add nsw i32 %i.02, 50, !dbg !16
20  call void @llvm.dbg.value(metadata i32 %add, i64 0, metadata !18, metadata !19), !dbg !20
21  %idxprom = sext i32 %add to i64, !dbg !21
22
23; CHECK:  %idxprom = sext i32 %add to i64
24; CHECK-NEXT:  -->  {50,+,1}<nuw><nsw><%for.body>
25
26  %arrayidx = getelementptr inbounds i32, i32* %arr, i64 %idxprom, !dbg !21
27  store i32 100, i32* %arrayidx, align 4, !dbg !22
28  br label %for.inc, !dbg !23
29
30for.inc:                                          ; preds = %for.body
31  %inc = add nsw i32 %i.02, 1, !dbg !24
32  %cmp = icmp slt i32 %inc, %n, !dbg !12
33  br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !dbg !15, !llvm.loop !25
34
35for.cond.for.end_crit_edge:                       ; preds = %for.inc
36  br label %for.end, !dbg !15
37
38for.end:                                          ; preds = %for.cond.for.end_crit_edge, %entry
39  ret void, !dbg !27
40}
41
42; Function Attrs: nounwind readnone
43declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
44
45!llvm.dbg.cu = !{!0}
46!llvm.module.flags = !{!3, !4, !5}
47!llvm.ident = !{!6}
48
49!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0  (llvm/trunk 271857)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
50!1 = !DIFile(filename: "x.c", directory: "/Users/sanjoy/Code/clang/build/debug+asserts-x86")
51!2 = !{}
52!3 = !{i32 2, !"Dwarf Version", i32 2}
53!4 = !{i32 2, !"Debug Info Version", i32 3}
54!5 = !{i32 1, !"PIC Level", i32 2}
55!6 = !{!"clang version 3.9.0  (llvm/trunk 271857)"}
56!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
57!8 = !DISubroutineType(types: !9)
58!9 = !{null, !10, !11}
59!10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
60!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, align: 64)
61!12 = !DILocation(line: 2, column: 24, scope: !13)
62!13 = distinct !DILexicalBlock(scope: !14, file: !1, line: 2, column: 6)
63!14 = distinct !DILexicalBlock(scope: !7, file: !1, line: 2, column: 6)
64!15 = !DILocation(line: 2, column: 6, scope: !14)
65!16 = !DILocation(line: 3, column: 14, scope: !17)
66!17 = distinct !DILexicalBlock(scope: !13, file: !1, line: 2, column: 34)
67!18 = !DILocalVariable(name: "k", scope: !17, file: !1, line: 3, type: !10)
68!19 = !DIExpression()
69!20 = !DILocation(line: 3, column: 8, scope: !17)
70!21 = !DILocation(line: 4, column: 4, scope: !17)
71!22 = !DILocation(line: 4, column: 11, scope: !17)
72!23 = !DILocation(line: 5, column: 6, scope: !17)
73!24 = !DILocation(line: 2, column: 30, scope: !13)
74!25 = distinct !{!25, !26}
75!26 = !DILocation(line: 2, column: 6, scope: !7)
76!27 = !DILocation(line: 6, column: 1, scope: !7)
77