1 ; RUN: opt -S -loop-reduce %s | FileCheck %s
3 ;; Ensure that scev-based salvaging in LSR does not select an IV containing
6 target triple = "x86_64-unknown-linux-gnu"
8 define i16 @n(i1 %c1) !dbg !8 {
10 br i1 %c1, label %m, label %for.body
12 for.body: ; preds = %for.body, %entry
13 %iv = phi i16 [ %ivdec, %for.body ], [ 14, %entry ]
14 %ivdec = sub i16 %iv, 1
15 call void @llvm.dbg.value(metadata i16 %iv, metadata !21, metadata !DIExpression()), !dbg !19
18 m: ; preds = %m, %entry
19 %0 = phi i16 [ 3, %m ], [ 6, %entry ]
21 ; CHECK: call void @llvm.dbg.value(metadata i16 poison, metadata !{{[0-9]+}}, metadata !DIExpression()),
22 call void @llvm.dbg.value(metadata i16 %0, metadata !14, metadata !DIExpression()), !dbg !19
26 ; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
27 declare void @llvm.dbg.value(metadata, metadata, metadata)
30 !llvm.module.flags = !{!3, !4, !5, !6}
33 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 14.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, globals: !2, splitDebugInlining: false, nameTableKind: None)
34 !1 = !DIFile(filename: "reduced.c", directory: "/")
36 !3 = !{i32 7, !"Dwarf Version", i32 4}
37 !4 = !{i32 2, !"Debug Info Version", i32 3}
38 !5 = !{i32 1, !"wchar_size", i32 1}
39 !6 = !{i32 7, !"frame-pointer", i32 2}
40 !7 = !{!"clang version 14.0.0"}
41 !8 = distinct !DISubprogram(name: "n", scope: !1, file: !1, line: 18, type: !9, scopeLine: 18, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)
42 !9 = !DISubroutineType(types: !10)
44 !11 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
46 !13 = !DILabel(scope: !8, name: "m", file: !1, line: 22)
47 !14 = !DILocalVariable(name: "k", arg: 2, scope: !15, file: !1, line: 9, type: !11)
48 !15 = distinct !DISubprogram(name: "i", scope: !1, file: !1, line: 9, type: !16, scopeLine: 9, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !18)
49 !16 = !DISubroutineType(types: !17)
50 !17 = !{!11, !11, !11}
52 !19 = !DILocation(line: 0, scope: !15, inlinedAt: !20)
53 !20 = distinct !DILocation(line: 23, scope: !8)
54 !21 = !DILocalVariable(name: "x", arg: 2, scope: !15, file: !1, line: 1, type: !11)