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